Weather in Bismarck: September
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Average day temperature: | 74.2°F |
| Average night temperature: | 58.3°F | |
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Number of sunny days: | 21 days |
| Day length: | 11.7 - 13.3 hours | |
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Number of rainy days: | 1 day |
| Precipitation totals: | 0.3 in. | |
| more information | ||
14 days
forecast
forecast
| Bismarck |
weather in
October
October
| Bismarck |
Air temperature in September, °F
Show year:
2025
2024
2023
The highest day temperature during September of 2025 was 86°F. At the same time the lowest night temperature was 40°F. Daily and nightly averages during September were 71.0°F and 55.8°F.
Sunny, partly cloudy and cloudy days
Mostly all days in September are sunny but cloudy days are also possible.
Precipitation total in September, in.
Precipitation total value in Bismarck in September is 0.3 in. Other months of the year show relatively similar values.
Wind speed in September, mph
The average wind speed value in September is 8.9 mph
Average sunny hours
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: 9.4.
Best time for vacation in Bismarck
Bismarck on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Bismarck
Local time: 22:14
December 05, friday
0000
25°F
E
6 mph
6 mph
0300
27°F
E
6 mph
6 mph
0600
28°F
E
9 mph
9 mph
0900
30°F
SE
11 mph
11 mph
1200
30°F
SE
15 mph
15 mph
1500
27°F
SE
14 mph
14 mph
1800
25°F
SE
8 mph
8 mph
2100
21°F
E
3 mph
3 mph
