Weather in Boulder: September
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Average day temperature: | 68.7°F |
| Average night temperature: | 50.1°F | |
 |
Number of sunny days: | 21 days |
| Day length: | 11.8 - 13.1 hours | |
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Number of rainy days: | 1 day |
| Precipitation totals: | 0.7 in. | |
| more information | ||
14 days
forecast
forecast
| Boulder |
weather in
October
October
| Boulder |
Air temperature in September, °F
Show year:
2024
2023
2022
The highest day temperature during September of 2024 was 88°F. At the same time the lowest night temperature was 46°F. Day and night temperature averages during September were 76.6°F and 58.3°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 Boulder in September is 0.7 in. Other months of the year show relatively similar values.
Wind speed in September, mph
The average wind speed value in September is 6.6 mph It makes September one of the least windy months of the year.
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: 9.5.
Best time for vacation in Boulder
Boulder on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Boulder
Local time: 11:51
November 21, thursday
1200
52°F
W
4 mph
4 mph
1500
55°F
NW
2 mph
2 mph
1800
46°F
E
7 mph
7 mph
2100
43°F
E
10 mph
10 mph
November 22, friday
0000
39°F
E
10 mph
10 mph
0300
37°F
E
9 mph
9 mph
0600
39°F
E
7 mph
7 mph
0900
48°F
E
5 mph
5 mph
