The temperatures in Bismarck in August are comfortable with low of 16°C and and high up to 28°C.
You can expect about 3 to 8 days of rain in Bismarck during the month of August. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Bismarck in August 2025.
If you’re planning to visit Bismarck in the near future, we highly recommend that you review the 14 day weather forecast for Bismarck before you arrive.
Temperatures
28° / 16°
Rainy Days
4
Snowy Days
0
Dry Days
27
Rainfall
77
mm
Sun Hours
11.4
Hrs
