What is the weather like in Niagara Falls vs St. Louis in September?

In September, Niagara Falls averages 24°C high / 14°C low with about 68 mm of rain; St. Louis averages 29°C high / 15°C low with about 83 mm.

Niagara Falls vs St. Louis in September

Niagara Falls is the better pick in September — 92 vs 85 on SeasonMap's comfort score. Niagara Falls is nice, a little rain, clean air, while St. Louis is hot, rainy, clean air.

Niagara Falls vs St. Louis — September climate, side by side

	🇨🇦 Niagara Falls	🇺🇸 St. Louis
Comfort score	92/100 (S)	85/100 (A)
Feels-like high	23°C	30°C
Avg high / low	24° / 14°	29° / 15°
Rainfall	68 mm	83 mm
Rainy days	7	5
Humidity	74%	67%
Air quality (AQI)	49	50

Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.

Month by month

Niagara Falls vs St. Louis in September — FAQ

Is September better in Niagara Falls or St. Louis?: Niagara Falls is the better pick in September — 92 vs 85 on SeasonMap's comfort score. Niagara Falls is nice, a little rain, clean air, while St. Louis is hot, rainy, clean air.
What is the weather like in Niagara Falls vs St. Louis in September?: In September, Niagara Falls averages 24°C high / 14°C low with about 68 mm of rain; St. Louis averages 29°C high / 15°C low with about 83 mm.