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

In September, St. Louis averages 29°C high / 15°C low with about 83 mm of rain; Toronto averages 23°C high / 14°C low with about 55 mm.

St. Louis vs Toronto in September

Toronto is the better pick in September — 93 vs 85 on SeasonMap's comfort score. Toronto is nice, a little rain, clean air, while St. Louis is hot, rainy, clean air.

St. Louis vs Toronto — September climate, side by side

	🇺🇸 St. Louis	🇨🇦 Toronto
Comfort score	85/100 (A)	93/100 (S)
Feels-like high	30°C	22°C
Avg high / low	29° / 15°	23° / 14°
Rainfall	83 mm	55 mm
Rainy days	5	7
Humidity	67%	74%
Air quality (AQI)	50	48

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

Month by month

St. Louis vs Toronto in September — FAQ

Is September better in St. Louis or Toronto?: Toronto is the better pick in September — 93 vs 85 on SeasonMap's comfort score. Toronto is nice, a little rain, clean air, while St. Louis is hot, rainy, clean air.
What is the weather like in St. Louis vs Toronto in September?: In September, St. Louis averages 29°C high / 15°C low with about 83 mm of rain; Toronto averages 23°C high / 14°C low with about 55 mm.