Gateway Arch National Park vs Indianapolis: which is better, month by month

Gateway Arch National Park beats Indianapolis in 7 of 12 months — its lead peaks in January (65 vs 41) — while Indianapolis wins May to September.

Each place is scored under the lens that suits its type — they are different kinds of destination, so the scores are each place at its own best. Comfort is SeasonMap's 0–100 estimate from ERA5 climate normals, not a forecast.

Gateway Arch National Park

🇺🇸 United States · mild climate

Best month
April 87/100
Months won
7 of 12

Indianapolis

🇺🇸 United States · mild climate

Best month
September 89/100
Months won
5 of 12

Gateway Arch National Park vs Indianapolis — all 12 months

MonthGateway Arch National ParkIndianapolisWinnerGap
January65Ccold, a little rain, clean air41Ffreezing, a little rain, clean airGateway Arch National Park24
February73Bcold, a little rain, clean air54Dcold, a little rain, clean airGateway Arch National Park19
March77Bcool, rainy, clean air63Ccold, rainy, clean airGateway Arch National Park14
April87Anice, rainy, clean air74Bnice, rainy, clean airGateway Arch National Park13
May79Bwarm, rainy88Anice, rainy, clean airIndianapolis9
June66Csweltering, rainy79Bhot, rainyIndianapolis13
July57Dsweltering, rainy69Chot, rainyIndianapolis12
August66Csweltering, rainy78Bhot, rainyIndianapolis12
September81Ahot, rainy, clean air89Awarm, a little rain, clean airIndianapolis8
October87Anice, a little rain, clean air82Anice, a little rain, clean airGateway Arch National Park5
November78Bcool, a little rain, clean air64Ccold, a little rain, clean airGateway Arch National Park14
December71Bcold, a little rain, clean air49Fcold, a little rain, clean airGateway Arch National Park22

A month is a tie when the two are within 3 points. The widest gap is January (65 vs 41). Tap a month for that month's temperature, rain, humidity and air quality side by side.