Indianapolis vs St. Louis: which is better, month by month

St. Louis beats Indianapolis in 6 of 12 months — its lead peaks in December (59 vs 49) — while Indianapolis wins August to September; they are within 3 points in the other 4 months.

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.

Indianapolis

🇺🇸 United States · mild climate

Best month: September 89/100
Months won: 2 of 12

St. Louis

🇺🇸 United States · mild climate

Best month: May 87/100
Months won: 6 of 12

Indianapolis vs St. Louis — all 12 months

Month	Indianapolis	St. Louis	Winner	Gap
January	41Ffreezing, a little rain, clean air	50Dcold, a little rain, clean air	St. Louis	9
February	54Dcold, a little rain, clean air	62Ccold, a little rain, clean air	St. Louis	8
March	63Ccold, rainy, clean air	69Ccool, rainy, clean air	St. Louis	6
April	74Bnice, rainy, clean air	80Anice, rainy, clean air	St. Louis	6
May	88Anice, rainy, clean air	87Awarm, rainy	Tie	1
June	79Bhot, rainy	76Bsweltering, rainy	Tie	3
July	69Chot, rainy	66Csweltering, rainy	Tie	3
August	78Bhot, rainy	73Bsweltering, rainy	Indianapolis	5
September	89Awarm, a little rain, clean air	85Ahot, rainy, clean air	Indianapolis	4
October	82Anice, a little rain, clean air	84Anice, a little rain, clean air	Tie	2
November	64Ccold, a little rain, clean air	68Ccool, a little rain, clean air	St. Louis	4
December	49Fcold, a little rain, clean air	59Dcold, a little rain, clean air	St. Louis	10

A month is a tie when the two are within 3 points. The widest gap is December (49 vs 59). Tap a month for that month's temperature, rain, humidity and air quality side by side.