Is September a good month to visit Saint-Louis?

September sits in the autumn period, so trip quality depends on your preferred weather, crowd levels, and pace.

What should I pack for Saint-Louis in September?

Average highs around 27.5C and lows near 16.7C. Pack flexible layers for changing daytime and evening temperatures.

What weather should I expect in Saint-Louis during September?

September typically averages around 22.1C, with about 87.5mm of rain across 8 days.

Saint-Louis, United States

Saint-Louis in September

Saint-Louis, United States

Visiting Saint-Louis in September means experiencing the autumn. During autumn, Saint-Louis offers crisp air, changing colours, and a cosy atmosphere.

SeasonAutumn

Travel StyleAdventure

Cost$

Weather in Saint-Louis in September

Average highs around 27.5C and lows near 16.7C. 87.5mm average precipitation and about 8 rainy days. September typically sits between August and October conditions, so it is useful for travelers wanting a balanced window in Saint-Louis. Pack flexible layers for changing daytime and evening temperatures.

Avg High27.5C

Avg Low16.7C

Rainy Days8

Precipitation87.5mm

Daylight12.4h/day

Sunshine10.4h/day

Wind14.4 km/h

UVmoderate

Humiditymoderate

Temperature

September brings autumn conditions in Saint-Louis, United States. The average temperature is about 22.1C, with lows near 16.7C and highs around 27.5C.

Sunshine Hours

Saint-Louis, United States usually gets around 10.4 hours of sunshine per day in September, with roughly 12.4 daylight hours available for sightseeing.