Fort Collins
FallPeak season ~78°F highs
Things to do in Fort Collins in September
September is one of the best months to visit Fort Collins, with average highs around 78°F. Crisp air and changing leaves make parks and viewpoints shine.
Best picks for September
What's famous here, weighted toward what shines in September.
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
Fort Collins in September: quick answers
Is September a good time to visit Fort Collins?
September is one of the best months to visit Fort Collins, with average highs around 78°F. Crisp air and changing leaves make parks and viewpoints shine.
What is the weather like in Fort Collins in September?
Average daytime highs are around 78°F, compared with 87°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 Fort Collins in September?
Top picks for September: Rocky Mountain National Park, Rocky Mountain National Park, Lindenmeier Overlook, Pawnee National Grassland, Arapaho National Recreation Area.
