Climate Insights for Bismarck

The climate in Bismarck is cool. The average annual temperature is 7°C and approximately 477mm of precipitation falls per year. Giugno is the wettest month, receiving around 71mm of rainfall. Bismarck is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: Luglio, Agosto, Giugno. The coldest months are Gennaio, Febbraio, Dicembre, when temperatures can drop to -13°C. Snowfall occurs from January to December, with around 72cm accumulating over the season.

Bismarck has a wide annual temperature range, spanning 42°C from the coldest to warmest months. The warmest month is Luglio, when average highs reach 29°C and the mean temperature sits around 22°C. The coldest month is Gennaio, when overnight lows fall to -13°C and the daily average is -9°C. On average, daily temperatures fluctuate by about 12°C between overnight lows and afternoon highs. The sharpest temperature change occurs between September and October, with a 9°C shift in average temperatures.

Bismarck is a relatively dry area, receiving approximately 477mm of precipitation annually, which averages out to around 40mm per month. The wettest month is June, averaging 71mm of rainfall. May and July also tend to see above-average precipitation. The driest month is January, with just 11mm. That's 60mm less than June, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Snowfall is a regular feature from January to December, with around 72cm accumulating over the season. December typically sees the most snow at around 17cm.

Bismarck is moderately windy, with an average annual wind speed of 23km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 26km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in August, with average winds dropping to 21km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 5km/h between the calmest and windiest months.

It is currently winter in Bismarck, which began on December 21, 2026. Bismarck is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in Luglio at around 29°C, while the coldest stretch bottoms out in Gennaio near -13°C. Spring is next, beginning on March 20, 2026 — 1 days from now.

The best time to visit Bismarck is during Giugno, Luglio, Agosto and Settembre, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 58mm per month. By contrast, Gennaio can be quite cold with temperatures dropping to -13°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Bismarck based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.