FallGood time to go ~83°F highs

Things to do in Saint Louis in September

September is a good month to visit Saint Louis, with average highs around 83°F. Crisp air and changing leaves make parks and viewpoints shine.

Plan a September weekend Where else in September

Best picks for September

What's famous here, weighted toward what shines in September.

1Foliage walks

Gateway Arch National Park

Gateway Arch National Park is an American national park located in St. Louis, Missouri, near the starting point of the Lewis and Clark Expedition.

Missouri Botanical Garden

non-profit organization in the USA

3Foliage walks

Holidays in September 2027

Labour Day · Mon, Sep 6

Expect busier roads and pricier stays around these dates. See long weekends.

Also great in September in Missouri

Kansas City

Saint Louis in September: quick answers

Is September a good time to visit Saint Louis?

September is a good month to visit Saint Louis, with average highs around 83°F. Crisp air and changing leaves make parks and viewpoints shine.

What is the weather like in Saint Louis in September?

Average daytime highs are around 83°F, compared with 90°F in the warmest month. Check the forecast a week out; our planner favors indoor stops on rainy days.

What are the best things to do in Saint Louis in September?

Top picks for September: Gateway Arch National Park, Missouri Botanical Garden, Forest Park, Gateway Arch, Tower Grove Park.