Fort Collins Weather in September

September in Fort Collins brings high temperatures, with daytime highs of 26°C (79°F) and nights around 9°C (48°F). The excellent weather makes it a solid choice for a visit.

Rainfall in Fort Collins in September

Past climate data indicates that roughly 7 days will see rain, totalling around 37 mm (1.5 in) for the month. Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.

Temperature in Fort Collins in September

September tends to be one of the excellent months in Fort Collins, with 26°C (79°F) in the afternoon and 9°C (48°F) overnight. Overall, the month follows a fairly predictable daily temperature pattern. At 9°C (48°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.

Sunshine in Fort Collins in September

Expect sunny days throughout the month, with an estimated 270 hours of sunshine. This makes it a pleasant time to visit Fort Collins.

So this is a great month to visit if you prefer dry days with pleasant temperatures.

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Check the conditions for any month of the year.

• January
• February
• March
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• May
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• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Fort Collins's climate page.

Fort Collins Temperature in September

Min Temperature 9°C (48°F)  

Max Temperature 26°C (79°F)  

Chance of Rain 23%  

Precipitation 37 mm (1.5 in)  

Rainy days 7 days  

Humidity 52% *  

Sunshine 270 hours *  

Percentage Sunshine 70% *  

* Data from: Cheyenne, the United States of America (68 KM, 42 Miles).

What to Wear in Fort Collins in September

Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Pack a light rain jacket or compact umbrella for occasional showers. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Fort Collins in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

10/10

Cycling

8/10

Walking

8/10

Barbeque

10/10

Camping

5/10

Outdoor sports

8/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Fort Collins's climate page.

More climate data for Fort Collins

Temperature Rainfall Sunshine Humidity

See the full Fort Collins climate overview or explore weather in the United States of America.