Smog hivernal, mois par mois dans le monde

Fumée de charbon et inversion thermique dans la vallée ; le problème, c’est l’air, pas le froid.

Cette page est un avertissement, pas une recommandation. Smog hivernal concerne 38 destinations sur SeasonMap ; les mois ci-dessous sont ceux où la période de risque est ouverte — la plupart des semaines passent sans histoire, et le score affiché à côté de chaque lieu reste le score climatique habituel, risque compris.

← Toutes les saisonsLe calendrier du monde

Quand ça a lieu

Nombre de destinations concernées (smog hivernal) ce mois-là. Les périodes bougent un peu chaque année.

Smog hivernal en janvier

  1. Dacca 🇧🇩 BangladeshDry-season air · 15 nov. – 28 févr.Brick kilns fire through the dry months, the construction dust never stops, and the city trades places with Delhi and Lahore at the top of the daily air rankings.93
  2. Kaohsiung 🇹🇼 TaïwanWinter air-quality season · 1 oct. – 31 mars (en général)The rain stops, the wind drops and the petrochemical belt on the north side has nowhere to go.87
  3. Bénarès 🇮🇳 IndePost-Diwali smog · 25 oct. – 10 févr. (en général)Stubble burning upwind, firecrackers and a cold air trap put the plains under a brown haze from Diwali onward.86
  4. Taichung 🇹🇼 TaïwanAutumn and winter haze · 15 oct. – 31 mars (en général)Once the summer winds drop, the mountains behind the city stop the air moving and central Taiwan's industry and power stations sit in it.86
  5. Agra 🇮🇳 IndeWinter smog season · 1 nov. – 31 janv. (en général)Cold still air over the Doab holds in field smoke, brick kilns and traffic, and the monument can vanish from the far end of its own garden before ten.82
  6. Lahore 🇵🇰 PakistanSmog season · 15 oct. – 31 janv. (en général)The province declares a smog season and acts on it: schools shut, offices go part-remote, brick kilns and building sites stop.74
  7. Islamabad 🇵🇰 PakistanWinter haze from the plains · 1 nov. – 15 janv. (en général)The Punjab smog does not stop at the motorway.69
  8. Chengdu 🇨🇳 ChineWinter smog · 15 nov. – 28 févr.The basin holds its own air all winter under an inversion.67
  9. Téhéran 🇮🇷 IranWinter inversion smog · 15 nov. – 28 févr. (en général)Cold air traps the traffic exhaust against the mountains for days at a time and the government closes schools and offices when it gets bad.64
  10. Tirana 🇦🇱 AlbanieWinter air pollution · 15 nov. – 28 févr.Old diesel cars in a basin ringed by hills, plus wood heating, and the winter readings climb well past what the city's reputation for mild weather suggests.63
  11. Shanghaï 🇨🇳 ChineWinter haze · 15 nov. – 28 févr. (en général)Still, cold weeks trap particulates over the delta and the skyline goes flat grey for days until a front clears it.62
  12. Turin 🇮🇹 ItaliePo valley smog season · 1 oct. – 31 marsThe city sits in a bowl with the Alps on three sides, and winter inversions trap particulates for days.62
  13. Milan 🇮🇹 ItaliePo valley smog season · 15 nov. – 28 févr. (en général)The valley sits under the Alps with nowhere for the air to go, so still cold weeks stack particulate up until the region bans the oldest cars.60
  14. Pingyao 🇨🇳 ChineHeating-season smog · 15 nov. – 15 mars (en général)Shanxi is China's coal province and the central heating goes on in the middle of November.59
  15. Plovdiv 🇧🇬 BulgarieWinter smog · 1 nov. – 10 mars (en général)Wood and coal stoves in the surrounding villages, plus an inversion that traps everything over the Thracian plain, give Plovdiv some of the worst winter particulate readings in the EU.58
  16. Xi'an 🇨🇳 ChineWinter smog · 15 nov. – 28 févr.The Guanzhong basin traps its air under the Qinling mountains all winter, and Xi'an posts some of the worst readings in the country.57
  17. Banja Luka 🇧🇦 Bosnie-HerzégovineWinter heating smog · 15 nov. – 28 févr. (en général)Solid-fuel heating plus a valley inversion parks the smoke over the city on still winter days, and January is reliably the worst of it.56
  18. Skopje 🇲🇰 Macédoine du NordWinter air pollution · 1 nov. – 28 févr.Household heating and traffic under a valley inversion make this one of the worst-affected capitals in Europe, and schools have been closed over it.55
  19. Ankara 🇹🇷 TurquieWinter inversion · 15 nov. – 28 févr. (en général)The city sits in a bowl and cold, still weather traps household heating smoke in it for days at a time.55
  20. Belgrade 🇷🇸 SerbieWinter smog · 1 nov. – 15 mars (en général)Household coal and wood, old cars and a windless inversion over the confluence put Belgrade near the top of the world air-quality tables on the worst January mornings.54
  21. Niš 🇷🇸 SerbieWinter heating smog · 1 déc. – 28 févr. (en général)The same basin that traps the summer heat traps coal smoke from December to February, and the readings go from ordinary to genuinely unhealthy.52
  22. Boise 🇺🇸 États-UnisWinter inversion · 15 nov. – 15 févr. (en général)Cold air pools in the U-shaped valley under a warm lid and the wood smoke and traffic exhaust stay with it, sometimes for weeks.51
  23. Novi Sad 🇷🇸 SerbieWinter air pollution · 15 nov. – 28 févr.Cold, still days over the Pannonian flat trap household heating smoke and the city regularly logs some of the worst readings in Europe.51
  24. Sofia 🇧🇬 BulgarieWinter smog · 1 nov. – 10 mars (en général)The city sits in a basin under Vitosha and the cold air does not move; wood and coal heating in the outer districts then fills it.49
  25. Stuttgart 🇩🇪 AllemagneValley inversion air · 15 nov. – 28 févr. (en général)The city centre sits in a steep bowl with almost no through wind, which is why it spent years as Germany's worst spot for traffic particulates and still traps its own air on still winter days.49

…et 10 de plus en janvier.

Au programme dans le monde en janvier →

Smog hivernal en février

  1. Kaohsiung 🇹🇼 TaïwanWinter air-quality season · 1 oct. – 31 mars (en général)The rain stops, the wind drops and the petrochemical belt on the north side has nowhere to go.90
  2. Bénarès 🇮🇳 IndePost-Diwali smog · 25 oct. – 10 févr. (en général)Stubble burning upwind, firecrackers and a cold air trap put the plains under a brown haze from Diwali onward.89
  3. Taichung 🇹🇼 TaïwanAutumn and winter haze · 15 oct. – 31 mars (en général)Once the summer winds drop, the mountains behind the city stop the air moving and central Taiwan's industry and power stations sit in it.88
  4. Dacca 🇧🇩 BangladeshDry-season air · 15 nov. – 28 févr.Brick kilns fire through the dry months, the construction dust never stops, and the city trades places with Delhi and Lahore at the top of the daily air rankings.84
  5. Tirana 🇦🇱 AlbanieWinter air pollution · 15 nov. – 28 févr.Old diesel cars in a basin ringed by hills, plus wood heating, and the winter readings climb well past what the city's reputation for mild weather suggests.75
  6. Chengdu 🇨🇳 ChineWinter smog · 15 nov. – 28 févr.The basin holds its own air all winter under an inversion.73
  7. Téhéran 🇮🇷 IranWinter inversion smog · 15 nov. – 28 févr. (en général)Cold air traps the traffic exhaust against the mountains for days at a time and the government closes schools and offices when it gets bad.70
  8. Plovdiv 🇧🇬 BulgarieWinter smog · 1 nov. – 10 mars (en général)Wood and coal stoves in the surrounding villages, plus an inversion that traps everything over the Thracian plain, give Plovdiv some of the worst winter particulate readings in the EU.68
  9. Xi'an 🇨🇳 ChineWinter smog · 15 nov. – 28 févr.The Guanzhong basin traps its air under the Qinling mountains all winter, and Xi'an posts some of the worst readings in the country.68
  10. Turin 🇮🇹 ItaliePo valley smog season · 1 oct. – 31 marsThe city sits in a bowl with the Alps on three sides, and winter inversions trap particulates for days.68
  11. Skopje 🇲🇰 Macédoine du NordWinter air pollution · 1 nov. – 28 févr.Household heating and traffic under a valley inversion make this one of the worst-affected capitals in Europe, and schools have been closed over it.68
  12. Belgrade 🇷🇸 SerbieWinter smog · 1 nov. – 15 mars (en général)Household coal and wood, old cars and a windless inversion over the confluence put Belgrade near the top of the world air-quality tables on the worst January mornings.67
  13. Niš 🇷🇸 SerbieWinter heating smog · 1 déc. – 28 févr. (en général)The same basin that traps the summer heat traps coal smoke from December to February, and the readings go from ordinary to genuinely unhealthy.67
  14. Shanghaï 🇨🇳 ChineWinter haze · 15 nov. – 28 févr. (en général)Still, cold weeks trap particulates over the delta and the skyline goes flat grey for days until a front clears it.66
  15. Milan 🇮🇹 ItaliePo valley smog season · 15 nov. – 28 févr. (en général)The valley sits under the Alps with nowhere for the air to go, so still cold weeks stack particulate up until the region bans the oldest cars.66
  16. Ankara 🇹🇷 TurquieWinter inversion · 15 nov. – 28 févr. (en général)The city sits in a bowl and cold, still weather traps household heating smoke in it for days at a time.66
  17. Novi Sad 🇷🇸 SerbieWinter air pollution · 15 nov. – 28 févr.Cold, still days over the Pannonian flat trap household heating smoke and the city regularly logs some of the worst readings in Europe.65
  18. Banja Luka 🇧🇦 Bosnie-HerzégovineWinter heating smog · 15 nov. – 28 févr. (en général)Solid-fuel heating plus a valley inversion parks the smoke over the city on still winter days, and January is reliably the worst of it.65
  19. Sofia 🇧🇬 BulgarieWinter smog · 1 nov. – 10 mars (en général)The city sits in a basin under Vitosha and the cold air does not move; wood and coal heating in the outer districts then fills it.64
  20. Pristina KosovoWinter air pollution · 1 nov. – 28 févr.Two lignite power stations sit just outside the city and household heating adds to them, and cold still nights trap the lot in the basin.64
  21. Pingyao 🇨🇳 ChineHeating-season smog · 15 nov. – 15 mars (en général)Shanxi is China's coal province and the central heating goes on in the middle of November.64
  22. Sarajevo 🇧🇦 Bosnie-HerzégovineValley inversion smog · 1 nov. – 28 févr.Cold air settles in the bowl of the valley and holds coal and wood smoke over the city for days at a time; the readings regularly rank among the world's worst.63
  23. Stuttgart 🇩🇪 AllemagneValley inversion air · 15 nov. – 28 févr. (en général)The city centre sits in a steep bowl with almost no through wind, which is why it spent years as Germany's worst spot for traffic particulates and still traps its own air on still winter days.62
  24. Boise 🇺🇸 États-UnisWinter inversion · 15 nov. – 15 févr. (en général)Cold air pools in the U-shaped valley under a warm lid and the wood smoke and traffic exhaust stay with it, sometimes for weeks.61
  25. Pékin 🇨🇳 ChineWinter smog days · 15 nov. – 28 févr. (en général)The heating season and a still, cold high can pin a grey lid over the city for days; it is far better than it was a decade ago, but the bad spells still come in runs of three or four days.59

…et 7 de plus en février.

Au programme dans le monde en février →

Smog hivernal en mars

  1. Kaohsiung 🇹🇼 TaïwanWinter air-quality season · 1 oct. – 31 mars (en général)The rain stops, the wind drops and the petrochemical belt on the north side has nowhere to go.80
  2. Taichung 🇹🇼 TaïwanAutumn and winter haze · 15 oct. – 31 mars (en général)Once the summer winds drop, the mountains behind the city stop the air moving and central Taiwan's industry and power stations sit in it.80
  3. Plovdiv 🇧🇬 BulgarieWinter smog · 1 nov. – 10 mars (en général)Wood and coal stoves in the surrounding villages, plus an inversion that traps everything over the Thracian plain, give Plovdiv some of the worst winter particulate readings in the EU.75
  4. Belgrade 🇷🇸 SerbieWinter smog · 1 nov. – 15 mars (en général)Household coal and wood, old cars and a windless inversion over the confluence put Belgrade near the top of the world air-quality tables on the worst January mornings.74
  5. Turin 🇮🇹 ItaliePo valley smog season · 1 oct. – 31 marsThe city sits in a bowl with the Alps on three sides, and winter inversions trap particulates for days.74
  6. Pingyao 🇨🇳 ChineHeating-season smog · 15 nov. – 15 mars (en général)Shanxi is China's coal province and the central heating goes on in the middle of November.71
  7. Sofia 🇧🇬 BulgarieWinter smog · 1 nov. – 10 mars (en général)The city sits in a basin under Vitosha and the cold air does not move; wood and coal heating in the outer districts then fills it.70
  8. Bichkek 🇰🇬 KirghizistanWinter smog · 1 nov. – 1 mars (en général)Coal stoves in the private housing around the city plus an inversion in the bowl put Bishkek near the top of the world air-quality lists on winter mornings.68
  9. Wrocław 🇵🇱 PologneWinter smog · 1 nov. – 10 mars (en général)Coal and wood stoves still heat a lot of the old tenement stock, and a windless freeze puts the readings into the range that makes national news.67
  10. Cracovie 🇵🇱 PologneWinter smog · 1 nov. – 15 mars (en général)Coal heating in the valley towns around the city and a cold inversion put the worst air of the year over Krakow between November and March.65
  11. Poznań 🇵🇱 PologneWinter smog · 10 nov. – 5 mars (en général)Solid-fuel stoves in the older districts and windless, freezing days push the air into the range Poland is known for.65
  12. Varsovie 🇵🇱 PologneWinter smog · 1 nov. – 15 mars (en général)Coal and wood heating in the surrounding towns plus a cold, still inversion give the city its worst air between November and March.64
  13. Łódź 🇵🇱 PologneWinter smog · 1 nov. – 15 mars (en général)Coal and wood stoves in the old tenement districts, plus still, cold air over a flat city, put the worst readings of the year here between November and March.64
  14. Zakopane 🇵🇱 PologneWinter smog · 15 nov. – 15 mars (en général)A resort at the foot of a national park with some of the worst winter air in Poland: coal stoves in the valley and no wind to move it.53

Au programme dans le monde en mars →

Smog hivernal en juin

  1. Pretoria 🇿🇦 Afrique du SudWinter haze in the valley · 1 juin – 31 août (en général)Cold air settles between the ridges and holds smoke from veld fires and household coal under it, so the horizon browns out for weeks.88
  2. Johannesbourg 🇿🇦 Afrique du SudWinter haze over the Highveld · 1 juin – 31 août (en général)Cold air traps smoke from veld fires, coal stoves and the industrial East Rand under an inversion, and the horizon goes brown for weeks.85
  3. Jakarta 🇮🇩 IndonésieDry-season smog · 15 juin – 15 oct. (en général)Traffic, coal plants along the coast and no rain to clear it: Jakarta regularly ranks among the world's most polluted major cities in these months.65

Au programme dans le monde en juin →

Smog hivernal en juillet

  1. Pretoria 🇿🇦 Afrique du SudWinter haze in the valley · 1 juin – 31 août (en général)Cold air settles between the ridges and holds smoke from veld fires and household coal under it, so the horizon browns out for weeks.88
  2. Johannesbourg 🇿🇦 Afrique du SudWinter haze over the Highveld · 1 juin – 31 août (en général)Cold air traps smoke from veld fires, coal stoves and the industrial East Rand under an inversion, and the horizon goes brown for weeks.85
  3. Jakarta 🇮🇩 IndonésieDry-season smog · 15 juin – 15 oct. (en général)Traffic, coal plants along the coast and no rain to clear it: Jakarta regularly ranks among the world's most polluted major cities in these months.69

Au programme dans le monde en juillet →

Smog hivernal en août

  1. Pretoria 🇿🇦 Afrique du SudWinter haze in the valley · 1 juin – 31 août (en général)Cold air settles between the ridges and holds smoke from veld fires and household coal under it, so the horizon browns out for weeks.93
  2. Johannesbourg 🇿🇦 Afrique du SudWinter haze over the Highveld · 1 juin – 31 août (en général)Cold air traps smoke from veld fires, coal stoves and the industrial East Rand under an inversion, and the horizon goes brown for weeks.91
  3. Jakarta 🇮🇩 IndonésieDry-season smog · 15 juin – 15 oct. (en général)Traffic, coal plants along the coast and no rain to clear it: Jakarta regularly ranks among the world's most polluted major cities in these months.70

Au programme dans le monde en août →

Smog hivernal en septembre

  1. Jakarta 🇮🇩 IndonésieDry-season smog · 15 juin – 15 oct. (en général)Traffic, coal plants along the coast and no rain to clear it: Jakarta regularly ranks among the world's most polluted major cities in these months.68

Au programme dans le monde en septembre →

Smog hivernal en octobre

  1. Turin 🇮🇹 ItaliePo valley smog season · 1 oct. – 31 marsThe city sits in a bowl with the Alps on three sides, and winter inversions trap particulates for days.78
  2. Lahore 🇵🇰 PakistanSmog season · 15 oct. – 31 janv. (en général)The province declares a smog season and acts on it: schools shut, offices go part-remote, brick kilns and building sites stop.72
  3. Bénarès 🇮🇳 IndePost-Diwali smog · 25 oct. – 10 févr. (en général)Stubble burning upwind, firecrackers and a cold air trap put the plains under a brown haze from Diwali onward.65
  4. Taichung 🇹🇼 TaïwanAutumn and winter haze · 15 oct. – 31 mars (en général)Once the summer winds drop, the mountains behind the city stop the air moving and central Taiwan's industry and power stations sit in it.64
  5. Jakarta 🇮🇩 IndonésieDry-season smog · 15 juin – 15 oct. (en général)Traffic, coal plants along the coast and no rain to clear it: Jakarta regularly ranks among the world's most polluted major cities in these months.61
  6. Kaohsiung 🇹🇼 TaïwanWinter air-quality season · 1 oct. – 31 mars (en général)The rain stops, the wind drops and the petrochemical belt on the north side has nowhere to go.60

Au programme dans le monde en octobre →

Smog hivernal en novembre

  1. Lahore 🇵🇰 PakistanSmog season · 15 oct. – 31 janv. (en général)The province declares a smog season and acts on it: schools shut, offices go part-remote, brick kilns and building sites stop.91
  2. Islamabad 🇵🇰 PakistanWinter haze from the plains · 1 nov. – 15 janv. (en général)The Punjab smog does not stop at the motorway.90
  3. Agra 🇮🇳 IndeWinter smog season · 1 nov. – 31 janv. (en général)Cold still air over the Doab holds in field smoke, brick kilns and traffic, and the monument can vanish from the far end of its own garden before ten.88
  4. Bénarès 🇮🇳 IndePost-Diwali smog · 25 oct. – 10 févr. (en général)Stubble burning upwind, firecrackers and a cold air trap put the plains under a brown haze from Diwali onward.82
  5. Shanghaï 🇨🇳 ChineWinter haze · 15 nov. – 28 févr. (en général)Still, cold weeks trap particulates over the delta and the skyline goes flat grey for days until a front clears it.78
  6. Chengdu 🇨🇳 ChineWinter smog · 15 nov. – 28 févr.The basin holds its own air all winter under an inversion.78
  7. Téhéran 🇮🇷 IranWinter inversion smog · 15 nov. – 28 févr. (en général)Cold air traps the traffic exhaust against the mountains for days at a time and the government closes schools and offices when it gets bad.78
  8. Pingyao 🇨🇳 ChineHeating-season smog · 15 nov. – 15 mars (en général)Shanxi is China's coal province and the central heating goes on in the middle of November.78
  9. Taichung 🇹🇼 TaïwanAutumn and winter haze · 15 oct. – 31 mars (en général)Once the summer winds drop, the mountains behind the city stop the air moving and central Taiwan's industry and power stations sit in it.77
  10. Dacca 🇧🇩 BangladeshDry-season air · 15 nov. – 28 févr.Brick kilns fire through the dry months, the construction dust never stops, and the city trades places with Delhi and Lahore at the top of the daily air rankings.75
  11. Ankara 🇹🇷 TurquieWinter inversion · 15 nov. – 28 févr. (en général)The city sits in a bowl and cold, still weather traps household heating smoke in it for days at a time.73
  12. Kaohsiung 🇹🇼 TaïwanWinter air-quality season · 1 oct. – 31 mars (en général)The rain stops, the wind drops and the petrochemical belt on the north side has nowhere to go.72
  13. Xi'an 🇨🇳 ChineWinter smog · 15 nov. – 28 févr.The Guanzhong basin traps its air under the Qinling mountains all winter, and Xi'an posts some of the worst readings in the country.71
  14. Plovdiv 🇧🇬 BulgarieWinter smog · 1 nov. – 10 mars (en général)Wood and coal stoves in the surrounding villages, plus an inversion that traps everything over the Thracian plain, give Plovdiv some of the worst winter particulate readings in the EU.70
  15. Tirana 🇦🇱 AlbanieWinter air pollution · 15 nov. – 28 févr.Old diesel cars in a basin ringed by hills, plus wood heating, and the winter readings climb well past what the city's reputation for mild weather suggests.70
  16. Pékin 🇨🇳 ChineWinter smog days · 15 nov. – 28 févr. (en général)The heating season and a still, cold high can pin a grey lid over the city for days; it is far better than it was a decade ago, but the bad spells still come in runs of three or four days.67
  17. Skopje 🇲🇰 Macédoine du NordWinter air pollution · 1 nov. – 28 févr.Household heating and traffic under a valley inversion make this one of the worst-affected capitals in Europe, and schools have been closed over it.67
  18. Sofia 🇧🇬 BulgarieWinter smog · 1 nov. – 10 mars (en général)The city sits in a basin under Vitosha and the cold air does not move; wood and coal heating in the outer districts then fills it.66
  19. Boise 🇺🇸 États-UnisWinter inversion · 15 nov. – 15 févr. (en général)Cold air pools in the U-shaped valley under a warm lid and the wood smoke and traffic exhaust stay with it, sometimes for weeks.66
  20. Belgrade 🇷🇸 SerbieWinter smog · 1 nov. – 15 mars (en général)Household coal and wood, old cars and a windless inversion over the confluence put Belgrade near the top of the world air-quality tables on the worst January mornings.65
  21. Turin 🇮🇹 ItaliePo valley smog season · 1 oct. – 31 marsThe city sits in a bowl with the Alps on three sides, and winter inversions trap particulates for days.65
  22. Novi Sad 🇷🇸 SerbieWinter air pollution · 15 nov. – 28 févr.Cold, still days over the Pannonian flat trap household heating smoke and the city regularly logs some of the worst readings in Europe.63
  23. Banja Luka 🇧🇦 Bosnie-HerzégovineWinter heating smog · 15 nov. – 28 févr. (en général)Solid-fuel heating plus a valley inversion parks the smoke over the city on still winter days, and January is reliably the worst of it.63
  24. Milan 🇮🇹 ItaliePo valley smog season · 15 nov. – 28 févr. (en général)The valley sits under the Alps with nowhere for the air to go, so still cold weeks stack particulate up until the region bans the oldest cars.62
  25. Bichkek 🇰🇬 KirghizistanWinter smog · 1 nov. – 1 mars (en général)Coal stoves in the private housing around the city plus an inversion in the bowl put Bishkek near the top of the world air-quality lists on winter mornings.62

…et 9 de plus en novembre.

Au programme dans le monde en novembre →

Smog hivernal en décembre

  1. Bénarès 🇮🇳 IndePost-Diwali smog · 25 oct. – 10 févr. (en général)Stubble burning upwind, firecrackers and a cold air trap put the plains under a brown haze from Diwali onward.92
  2. Taichung 🇹🇼 TaïwanAutumn and winter haze · 15 oct. – 31 mars (en général)Once the summer winds drop, the mountains behind the city stop the air moving and central Taiwan's industry and power stations sit in it.90
  3. Dacca 🇧🇩 BangladeshDry-season air · 15 nov. – 28 févr.Brick kilns fire through the dry months, the construction dust never stops, and the city trades places with Delhi and Lahore at the top of the daily air rankings.87
  4. Agra 🇮🇳 IndeWinter smog season · 1 nov. – 31 janv. (en général)Cold still air over the Doab holds in field smoke, brick kilns and traffic, and the monument can vanish from the far end of its own garden before ten.86
  5. Kaohsiung 🇹🇼 TaïwanWinter air-quality season · 1 oct. – 31 mars (en général)The rain stops, the wind drops and the petrochemical belt on the north side has nowhere to go.84
  6. Lahore 🇵🇰 PakistanSmog season · 15 oct. – 31 janv. (en général)The province declares a smog season and acts on it: schools shut, offices go part-remote, brick kilns and building sites stop.83
  7. Islamabad 🇵🇰 PakistanWinter haze from the plains · 1 nov. – 15 janv. (en général)The Punjab smog does not stop at the motorway.80
  8. Chengdu 🇨🇳 ChineWinter smog · 15 nov. – 28 févr.The basin holds its own air all winter under an inversion.69
  9. Shanghaï 🇨🇳 ChineWinter haze · 15 nov. – 28 févr. (en général)Still, cold weeks trap particulates over the delta and the skyline goes flat grey for days until a front clears it.68
  10. Téhéran 🇮🇷 IranWinter inversion smog · 15 nov. – 28 févr. (en général)Cold air traps the traffic exhaust against the mountains for days at a time and the government closes schools and offices when it gets bad.68
  11. Tirana 🇦🇱 AlbanieWinter air pollution · 15 nov. – 28 févr.Old diesel cars in a basin ringed by hills, plus wood heating, and the winter readings climb well past what the city's reputation for mild weather suggests.67
  12. Pingyao 🇨🇳 ChineHeating-season smog · 15 nov. – 15 mars (en général)Shanxi is China's coal province and the central heating goes on in the middle of November.66
  13. Xi'an 🇨🇳 ChineWinter smog · 15 nov. – 28 févr.The Guanzhong basin traps its air under the Qinling mountains all winter, and Xi'an posts some of the worst readings in the country.63
  14. Plovdiv 🇧🇬 BulgarieWinter smog · 1 nov. – 10 mars (en général)Wood and coal stoves in the surrounding villages, plus an inversion that traps everything over the Thracian plain, give Plovdiv some of the worst winter particulate readings in the EU.61
  15. Turin 🇮🇹 ItaliePo valley smog season · 1 oct. – 31 marsThe city sits in a bowl with the Alps on three sides, and winter inversions trap particulates for days.60
  16. Ankara 🇹🇷 TurquieWinter inversion · 15 nov. – 28 févr. (en général)The city sits in a bowl and cold, still weather traps household heating smoke in it for days at a time.60
  17. Skopje 🇲🇰 Macédoine du NordWinter air pollution · 1 nov. – 28 févr.Household heating and traffic under a valley inversion make this one of the worst-affected capitals in Europe, and schools have been closed over it.59
  18. Milan 🇮🇹 ItaliePo valley smog season · 15 nov. – 28 févr. (en général)The valley sits under the Alps with nowhere for the air to go, so still cold weeks stack particulate up until the region bans the oldest cars.57
  19. Belgrade 🇷🇸 SerbieWinter smog · 1 nov. – 15 mars (en général)Household coal and wood, old cars and a windless inversion over the confluence put Belgrade near the top of the world air-quality tables on the worst January mornings.57
  20. Banja Luka 🇧🇦 Bosnie-HerzégovineWinter heating smog · 15 nov. – 28 févr. (en général)Solid-fuel heating plus a valley inversion parks the smoke over the city on still winter days, and January is reliably the worst of it.57
  21. Niš 🇷🇸 SerbieWinter heating smog · 1 déc. – 28 févr. (en général)The same basin that traps the summer heat traps coal smoke from December to February, and the readings go from ordinary to genuinely unhealthy.57
  22. Sofia 🇧🇬 BulgarieWinter smog · 1 nov. – 10 mars (en général)The city sits in a basin under Vitosha and the cold air does not move; wood and coal heating in the outer districts then fills it.55
  23. Stuttgart 🇩🇪 AllemagneValley inversion air · 15 nov. – 28 févr. (en général)The city centre sits in a steep bowl with almost no through wind, which is why it spent years as Germany's worst spot for traffic particulates and still traps its own air on still winter days.53
  24. Novi Sad 🇷🇸 SerbieWinter air pollution · 15 nov. – 28 févr.Cold, still days over the Pannonian flat trap household heating smoke and the city regularly logs some of the worst readings in Europe.53
  25. Pristina KosovoWinter air pollution · 1 nov. – 28 févr.Two lignite power stations sit just outside the city and household heating adds to them, and cold still nights trap the lot in the basin.52

…et 10 de plus en décembre.

Au programme dans le monde en décembre →

Smog hivernal, mois par mois dans le monde | SeasonMap