FallPeak season ~78°F highs

Things to do in Great Falls in September

September is one of the best months to visit Great Falls, with average highs around 78°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

Lewis and Clark National Forest

US national forest in west central Montana, from 1907 to 2015, first established in 1897 as Lewis and Clarke Forest Reserve

2Foliage walks

Giant Springs State Park

spring in Montana, United States of America

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 Montana

Billings Missoula Bozeman

Great Falls in September: quick answers

Is September a good time to visit Great Falls?

September is one of the best months to visit Great Falls, with average highs around 78°F. Crisp air and changing leaves make parks and viewpoints shine.

What is the weather like in Great Falls in September?

Average daytime highs are around 78°F, compared with 81°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 Great Falls in September?

Top picks for September: Lewis and Clark National Forest, Giant Springs State Park, Benton Lake National Wildlife Refuge, Hewitt Lake National Wildlife Refuge, Black Coulee National Wildlife Refuge.