Weather in Boulder in Summer
| June | July | August | ||||
| Average day temperature: | 68.2°F | 74.0°F | 73.1°F | |||
| Average night temperature: | 50.7°F | 56.1°F | 55.9°F | |||
| Number of sunny days: | 13 days | 12 days | 13 days | |||
| Day length: | 14.8 - 15.0 h. | 14.3 - 15.0 h. | 13.1 - 14.2 h. | |||
| Number of rainy days: | 6 days | 5 days | 2 days | |||
| Precipitation totals: | 2.5 in. | 2.2 in. | 1.6 in. | |||
Day & Night air temperature, °F
June
July
August
0
12
24
36
48
60
72
84
96
73.1
74.0
68.2
55.9
56.1
50.7
| Day temperature | Night temperature |
Precipitation total, in.
June
July
August
0.0
0.4
0.8
1.3
1.7
2.1
2.5
2.9
3.4
1.6
2.2
2.5
Sunny, partly cloudy and cloudy days
June
July
August
0
5
10
15
20
25
30
35
2
3
4
15
16
12
13
12
13
| Cloudy days | Partly cloudy days | Sunny days |
Wind speed, mph
June
July
August
0.0
1.2
2.4
3.6
4.8
6.0
7.2
8.4
6.3
6.4
7
Average sunny hours
June
July
August
0
1
2
3
4
5
6
7
8
9
10
11
9
9.5
9.6
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: 22:43
April 22, tuesday
0000
36°F
NE
11 mph
11 mph
0300
34°F
E
7 mph
7 mph
0600
32°F
E
7 mph
7 mph
0900
46°F
NE
4 mph
4 mph
1200
54°F
E
10 mph
10 mph
1500
57°F
E
13 mph
13 mph
1800
50°F
N
2 mph
2 mph
2100
41°F
E
7 mph
7 mph
