Weather in Big Sky: September
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Average day temperature: | 68.1°F |
| Average night temperature: | 49.2°F | |
 |
Number of sunny days: | 19 days |
| Day length: | 11.7 - 13.2 hours | |
 |
Number of rainy days: | 2 days |
| Precipitation totals: | 1.3 in. | |
| more information | ||
14 days
forecast
forecast
| Big Sky |
weather in
October
October
| Big Sky |
Air temperature in September, °F
Show year:
2024
2023
2022
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
0
13
26
39
52
65
78
91
104
| Day temperature | Night temperature |
The highest day temperature during September of 2024 was 80°F. At the same time the lowest night temperature was 33°F. Day and night temperature averages during September were 63.3°F and 46.5°F.
Sunny, partly cloudy and cloudy days
| Sunny days | |
| Partly cloudy days | |
| Cloudy days |
66%
24%
10%
Mostly all days in September are sunny but cloudy days are also possible.
Precipitation total in September, in.
jan
feb
mar
apr
may
jun
jul
aug
sep
oct
nov
dec
0.0
0.3
0.6
0.9
1.2
1.5
1.8
2.1
1.2
1.5
1.8
1.2
1.3
1.5
1.8
Precipitation total value in Big Sky in September is 1.3 in. Other months of the year show relatively similar values.
Wind speed in September, mph
jan
feb
mar
apr
may
jun
jul
aug
sep
oct
nov
dec
0.0
0.9
1.9
2.8
3.7
4.7
5.6
6.6
4.6
4.6
4.7
5.3
5.2
5.5
5.1
5.4
4.6
4.5
3.9
4.6
4.6
4.7
5.4
5.3
5.2
5.5
5.1
5.4
4.6
4.5
3.9
The average wind speed value in September is 5.4 mph It makes September one of the most windy months of the year.
Average sunny hours
jan
feb
mar
apr
may
jun
jul
aug
sep
oct
nov
dec
0.0
2.1
4.1
6.2
8.2
10.3
12.3
14.4
3.9
4.8
7.1
10.3
12.0
10.1
6.7
6.5
5.8
4.4
4.3
3.9
4.8
7.1
9.1
10.3
12.0
10.1
6.7
6.5
5.8
4.4
4.3
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: 9.1.
Best time for vacation in Big Sky
Big Sky on a weather map
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Places in USA:
Name
°F
24 Hours Forecast
Big Sky
Local time: 15:21
March 12, wednesday
1800
34°F
N
10 mph
10 mph
2100
32°F
N
7 mph
7 mph
March 13, thursday
0000
32°F
N
7 mph
7 mph
0300
32°F
N
7 mph
7 mph
0600
30°F
N
9 mph
9 mph
0900
30°F
N
7 mph
7 mph
1200
34°F
N
13 mph
13 mph
1500
34°F
N
9 mph
9 mph
