Weather in Boulder in Autumn
| September | October | November | ||||
| Average day temperature: | ||||||
| Average day temperature: | 69.5°F | 57.2°F | 44.6°F | |||
| Average night temperature: | ||||||
| Average night temperature: | 50.8°F | 40.3°F | 29.6°F | |||
| Number of sunny days: | ||||||
| Number of sunny days: | 20 days | 20 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: | 0.8 in. | 0.5 in. | 0.6 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: 04:09
September 19, saturday
0600
55°F
E
6 mph
6 mph
0900
68°F
SW
3 mph
3 mph
1200
75°F
W
11 mph
11 mph
1500
70°F
NE
7 mph
7 mph
1800
61°F
W
2 mph
2 mph
2100
54°F
E
7 mph
7 mph
September 20, sunday
0000
52°F
E
4 mph
4 mph
0300
52°F
E
7 mph
7 mph
