Air quality in September: cleanest & most polluted destinations
Where the air is cleanest — and worst — to travel in September, ranked by the monthly-mean US Air Quality Index (AQI) across 600+ destinations. Lower is better: 0–50 is good, 100+ starts to bite, 150+ is unhealthy. Tap any place for its full September weather and air-quality breakdown.
Worst air quality in September
- 1Kuwait City, KuwaitVery unhealthy276AQI
- 2Damascus, SyriaVery unhealthy218AQI
- 3Jakarta, IndonesiaUnhealthy165AQI
- 4Manama, BahrainUnhealthy160AQI
- 5Riyadh, Saudi ArabiaUnhealthy156AQI
- 6Beijing, ChinaUnhealthy155AQI
- 7Hotan, ChinaUnhealthy for sensitive groups149AQI
- 8Chengdu, ChinaUnhealthy for sensitive groups140AQI
- 9Doha, QatarUnhealthy for sensitive groups136AQI
- 10Lahore, PakistanUnhealthy for sensitive groups135AQI
- 11Dubai, United Arab EmiratesUnhealthy for sensitive groups135AQI
- 12Baghdad, IraqUnhealthy for sensitive groups133AQI
- 13Ürümqi, ChinaUnhealthy for sensitive groups128AQI
- 14Delhi, IndiaUnhealthy for sensitive groups126AQI
- 15Abu Dhabi, United Arab EmiratesUnhealthy for sensitive groups125AQI
Cleanest air in September
- 1Honiara, Solomon IslandsGood17AQI
- 2Kona, United StatesGood17AQI
- 3La Fortuna, Costa RicaGood17AQI
- 4Malabo, Equatorial GuineaGood17AQI
- 5Pohnpei, MicronesiaGood18AQI
- 6Anchorage, United StatesGood19AQI
- 7Hawaii Volcanoes National Park, United StatesGood19AQI
- 8Hilo, United StatesGood19AQI
- 9Majuro, Marshall IslandsGood19AQI
- 10Kobuk Valley National Park, United StatesGood20AQI
- 11Nadi, FijiGood20AQI
- 12Kauai, United StatesGood22AQI
- 13Pai, ThailandGood22AQI
- 14Chuuk, MicronesiaGood23AQI
- 15Denali National Park, United StatesGood23AQI