Istanbul vs Mumbai: which is better, month by month

Istanbul beats Mumbai in 7 of 12 months — its lead peaks in June (87 vs 38) — while Mumbai wins December to February; they are within 3 points in March and November.

Each place is scored under the lens that suits its type. Comfort is SeasonMap's 0–100 estimate from ERA5 climate normals, not a forecast.

Istanbul

🇹🇷 Turkey · mild climate

Best month: May 94/100
Months won: 7 of 12

Mumbai

🇮🇳 India · tropical climate

Best month: January 85/100
Months won: 3 of 12

Istanbul vs Mumbai — all 12 months

Month	Istanbul	Mumbai	Winner	Gap
January	59Dcold, rainy, muggy air	85Ahot, dry, poor air quality	Mumbai	26
February	66Ccold, a little rain, muggy air	82Asweltering, dry, poor air quality	Mumbai	16
March	72Bcool, a little rain, muggy air	75Bsweltering, dry, poor air quality	Tie	3
April	84Anice, a little rain, muggy air	67Csweltering, dry, poor air quality	Istanbul	17
May	94Snice, a little rain, muggy air	62Csweltering, a little rain, muggy air	Istanbul	32
June	87Ahot, dry	38Fsweltering, soaked, muggy air	Istanbul	49
July	78Bhot, a little rain	35Fsweltering, soaked, muggy air	Istanbul	43
August	77Bhot, dry, clean air	41Fsweltering, soaked, muggy air	Istanbul	36
September	86Awarm, a little rain	43Fsweltering, soaked, muggy air	Istanbul	43
October	88Anice, a little rain, clean air	58Dsweltering, rainy, poor air quality	Istanbul	30
November	74Bcool, rainy, clean air	71Bsweltering, dry, poor air quality	Tie	3
December	63Ccold, rainy, muggy air	79Bsweltering, dry, poor air quality	Mumbai	16

A month is a tie when the two are within 3 points. The widest gap is June (87 vs 38). Tap a month for that month's temperature, rain, humidity and air quality side by side.