Fort Collins
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Current – 10-day forecastForecast

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.

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).

Fort Collins Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Fort Collins - and find the best time to visit.

Best Places in the United States of America in September

Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in September →

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

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

Fort Collins 3-Day Forecast

Popular in September

Where to go in September - average daytime high across popular destinations.

Bucket list

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