FallPeak season ~80°F highs

Things to do in Denver in September

September is one of the best months to visit Denver, with average highs around 80°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

Arapaho National Forest

national forest in north-central Colorado, United States

2Fall colors

Loveland Pass

mountain pass in north-central Colorado, United States

Denver Art Museum

museum in Denver, Colorado, United States

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 Colorado

Colorado Springs Montrose Fort Collins Pueblo

Denver in September: quick answers

Is September a good time to visit Denver?

September is one of the best months to visit Denver, with average highs around 80°F. Crisp air and changing leaves make parks and viewpoints shine.

What is the weather like in Denver in September?

Average daytime highs are around 80°F, compared with 91°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 Denver in September?

Top picks for September: Arapaho National Forest, Loveland Pass, Denver Art Museum, Dinosaur Ridge Visitor Center, Union Station.