Weather in Boulder in Autumn
| September | October | November | ||||
| Average day temperature: | 68.7°F | 56.0°F | 42.6°F | |||
| Average night temperature: | 50.1°F | 38.8°F | 27.6°F | |||
| Number of sunny days: | 21 days | 21 days | 19 days | |||
| Day length: | 11.8 - 13.1 h. | 10.5 - 11.8 h. | 9.6 - 10.5 h. | |||
| Number of rainy days: | 1 day | 0 days | 0 days | |||
| Precipitation totals: | 0.7 in. | 0.5 in. | 0.7 in. | |||
Day & Night air temperature, °F
September
October
November
0
11
22
33
44
55
66
77
88
42.6
56.0
68.7
27.6
38.8
50.1
| Day temperature | Night temperature |
Precipitation total, in.
September
October
November
0.0
0.1
0.3
0.4
0.5
0.6
0.8
0.9
0.7
0.5
0.7
Sunny, partly cloudy and cloudy days
September
October
November
0
5
10
15
20
25
30
35
4
2
3
7
8
7
19
21
21
| Cloudy days | Partly cloudy days | Sunny days |
Wind speed, mph
September
October
November
0.0
1.4
2.8
4.2
5.6
7.0
8.5
9.9
11.3
8.2
7.2
6.6
Average sunny hours
September
October
November
0
1
2
3
4
5
6
7
8
9
10
11
7.1
8.5
9.5
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
Leaflet | Tiles © Esri
Places in USA:
Name
°F
24 Hours Forecast
Boulder
Local time: 23:32
April 22, tuesday
0000
36°F
E
9 mph
9 mph
0300
34°F
E
7 mph
7 mph
0600
34°F
E
8 mph
8 mph
0900
46°F
NE
4 mph
4 mph
1200
55°F
E
11 mph
11 mph
1500
57°F
E
14 mph
14 mph
1800
52°F
SE
2 mph
2 mph
2100
41°F
E
8 mph
8 mph
