Weather in Fort Collins: September
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Average day temperature: | 80.0°F |
| Average night temperature: | 55.6°F | |
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Number of sunny days: | 22 days |
| Day length: | 11.8 - 13.1 hours | |
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Number of rainy days: | 1 day |
| Precipitation totals: | 0.4 in. | |
| more information | ||
14 days
forecast
forecast
| Fort Collins |
weather in
October
October
| Fort Collins |
Air temperature in September, °F
Show year:
2025
2024
2023
The highest day temperature during September of 2025 was 88°F. At the same time the lowest night temperature was 45°F. Daily and nightly averages during September were 76.2°F and 53.7°F.
Sunny, partly cloudy and cloudy days
Mostly all days in September are sunny but cloudy days are also possible.
Precipitation total in September, in.
Precipitation total value in Fort Collins in September is 0.4 in. Other months of the year show relatively similar values.
Wind speed in September, mph
The average wind speed value in September is 5.5 mph
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in September is: 9.7.
Best time for vacation in Fort Collins
Fort Collins on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Fort Collins
Local time: 19:32
December 14, sunday
2100
39°F
E
5 mph
5 mph
December 15, monday
0000
34°F
SE
6 mph
6 mph
0300
30°F
E
5 mph
5 mph
0600
32°F
E
6 mph
6 mph
0900
36°F
SE
5 mph
5 mph
1200
52°F
NW
1 mph
1 mph
1500
59°F
N
3 mph
3 mph
1800
52°F
E
2 mph
2 mph
