Weather in Boulder in Autumn
| September | October | November | ||||
| Average day temperature: | ||||||
| Average day temperature: | 68.7°F | 56.0°F | 42.6°F | |||
| Average night temperature: | ||||||
| Average night temperature: | 50.1°F | 38.8°F | 27.6°F | |||
| Number of sunny days: | ||||||
| Number of sunny days: | 21 days | 21 days | 19 days | |||
| Day length: | ||||||
| Day length: | 11.8 - 13.1 h. | 10.5 - 11.8 h. | 9.6 - 10.5 h. | |||
| Number of rainy days: | ||||||
| Number of rainy days: | 1 day | 0 days | 0 days | |||
| Precipitation totals: | ||||||
| Precipitation totals: | 0.7 in. | 0.5 in. | 0.7 in. | |||
Day & Night air temperature, °F
Precipitation total, in.
Sunny, partly cloudy and cloudy days
Wind speed, mph
Average sunny hours
Sunny hours are calculated based on the average daily number of hours while sunlight can reach the ground. It depends on day length and cloudiness during the day.
Best time for vacation in Boulder
Boulder on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Boulder
Local time: 01:16
December 22, sunday
0300
46°F
E
13 mph
13 mph
0600
46°F
E
14 mph
14 mph
0900
46°F
E
12 mph
12 mph
1200
54°F
E
7 mph
7 mph
1500
54°F
E
6 mph
6 mph
1800
50°F
E
9 mph
9 mph
2100
46°F
E
10 mph
10 mph
December 23, monday
0000
43°F
E
10 mph
10 mph
