Niagara Falls vs St. Louis: which is better, month by month

St. Louis beats Niagara Falls in 7 of 12 months — its lead peaks in February (62 vs 45) — while Niagara Falls wins June to September; they are within 3 points in May.

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.

Niagara Falls

🇨🇦 Canada · mild climate

Best month: September 92/100
Months won: 4 of 12

St. Louis

🇺🇸 United States · mild climate

Best month: May 87/100
Months won: 7 of 12

Niagara Falls vs St. Louis — all 12 months

Month	Niagara Falls	St. Louis	Winner	Gap
January	37Ffreezing, a little rain, clean air	50Dcold, a little rain, clean air	St. Louis	13
February	45Ffreezing, a little rain, clean air	62Ccold, a little rain, clean air	St. Louis	17
March	57Dcold, a little rain, clean air	69Ccool, rainy, clean air	St. Louis	12
April	68Ccold, rainy, clean air	80Anice, rainy, clean air	St. Louis	12
May	85Anice, a little rain	87Awarm, rainy	Tie	2
June	89Awarm, a little rain	76Bsweltering, rainy	Niagara Falls	13
July	77Bhot, rainy	66Csweltering, rainy	Niagara Falls	11
August	82Ahot, rainy	73Bsweltering, rainy	Niagara Falls	9
September	92Snice, a little rain, clean air	85Ahot, rainy, clean air	Niagara Falls	7
October	73Bcool, rainy, clean air	84Anice, a little rain, clean air	St. Louis	11
November	59Dcold, a little rain, clean air	68Ccool, a little rain, clean air	St. Louis	9
December	43Ffreezing, a little rain, clean air	59Dcold, a little rain, clean air	St. Louis	16

A month is a tie when the two are within 3 points. The widest gap is February (45 vs 62). Tap a month for that month's temperature, rain, humidity and air quality side by side.