Climate Insights for Bismarck

The climate in Bismarck is temperate. The average annual temperature is 14°C and approximately 1203mm of precipitation falls per year. Bismarck receives a notable amount of rainfall throughout the year, including during its driest month. Bismarck is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: Luglio, Giugno, Agosto. The coldest months are Gennaio, Febbraio, Dicembre, when temperatures can drop to -2°C. Light snow can occur between January and December.

Temperatures in Bismarck vary considerably across the year, with a 33°C difference between the coldest and warmest months. The warmest month is Luglio, when average highs reach 31°C and the mean temperature sits around 26°C. The coldest month is Gennaio, when overnight lows fall to -2°C and the daily average is 1°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 7°C shift in average temperatures.

Bismarck is a fairly wet location, receiving approximately 1203mm of precipitation annually, which averages out to around 100mm per month. The wettest month is April, averaging 147mm of rainfall. May and March also tend to see above-average precipitation. The driest month is September, with just 70mm. That's 77mm less than April, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Light snowfall can occur between January and December, totalling around 27cm annually. February is the snowiest month with approximately 11cm.

Bismarck is mildly breezy, with an average annual wind speed of 16km/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 19km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 12km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 7km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 17km/h in winter, 18km/h in spring, 13km/h in summer, 15km/h in autumn.

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 31°C, while the coldest stretch bottoms out in Gennaio near -2°C. Spring is next, beginning on March 20, 2026 — 1 days from now.

The best time to visit Bismarck is during Giugno and Settembre, when the weather is most comfortable for travellers. During these months, average temperatures hover around 23°C with modest rainfall averaging 77mm per month. By contrast, Luglio can be uncomfortably hot with highs reaching 31°C, while Gennaio is the coldest period with lows dropping to -2°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

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.