Bismarck (ND) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Bismarck.
Climate overview of Bismarck
Temperatures in Bismarck, North Dakota, United States of America, vary greatly throughout the year. July is the hottest month at 29°C (84°F), while January is the coldest at -4°C (25°F).
The city tends toward dry conditions, with around 493 mm (19 in) of rain/snowfall per year. It does, however, have a distinct dry season from November to March, with warm summers and very cold winters. July is the sunniest month, averaging 11.8 hours of sunshine per day.
Bismarck Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Bismarck - and find the best time to visit.
Monthly Temperature in Bismarck
The climate in Bismarck is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a comfortable 29°C (84°F) in July to a very cold -4°C (25°F) in the coolest month, January.
Nights vary from 15°C (59°F) in July to around -15°C (5°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Bismarck
With annual rain/snowfall averaging 493 mm (19 in), Bismarck maintains relatively low precipitation levels throughout the seasons. The climate in Bismarck shows significant variation throughout the year. Expect moderate rainfall in June, the wettest month, with an average of 90 mm (3.5 in) of precipitation over 12 rainy days.
In contrast, the driest month January offers drier and sunnier days, with around 10 mm (0.4 in) of snowfall over 7 snowy days. For more details, please visit our Bismarck Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Bismarck
For those who appreciate different seasons, Bismarck serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 11.8 hours of sunshine daily, and embrace the darker days in November, offering only 4.1 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Bismarck by Month
The relative humidity is high throughout the year in Bismarck.
The city experiences its highest humidity in December, reaching 74%. In May, the humidity drops to its lowest level at 60%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Bismarck
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, June, July, August and September
- Warmest weather: July and August
- Most sunshine: July
- Fewest rainy days: January, February, March and November
- Seasonal pattern: A distinct dry season from November to March, with warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -15°C (5°F).
Frequently asked questions about the climate in Bismarck
What is the best time to visit Bismarck?
May, June, July, August and September typically offer the most optimal weather in Bismarck. In contrast, January, February and December tend to have less optimal conditions. Bismarck has a distinct dry season from November to March, with warm summers and very cold winters.
What temperatures can I expect in Bismarck?
Daytime highs range from -4°C (25°F) in January to 29°C (84°F) in July. Nighttime lows range from -15°C (5°F) to 15°C (59°F). Temperatures vary considerably through the year.
How much rain does Bismarck get?
Annual rainfall is around 493 mm (19 in). June is the wettest month with 90 mm (3.5 in), while January is the driest with 10 mm (0.4 in).
How sunny is Bismarck?
Bismarck receives around 2,732 hours of sunshine per year. July is the sunniest month with 354 hours, while November is the cloudiest with just 122 hours. Overall, Bismarck enjoys abundant sunshine.
Bismarck 3-Day Forecast
Bismarck (ND) 3-Day Forecast
Bismarck on the map
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