Last updated: June 24, 2025
In December, the average temperature in Bismarck, United States is a brisk 2°C (36°F). Expect temperatures to swing from a chilly minimum of -25°C (-13°F) to a mild maximum of 18°C (64°F). The region sees about 60 mm (2.4 in) of precipitation across 9 days, while maintaining an average humidity level of 84%.
In December in Bismarck, the average temperature is 2°C (36°F). The maximum can reach 18°C (64°F) and the minimum can be as low as -25°C (-13°F). Travelers should be prepared for a wide range of temperatures, from chilly days to much warmer afternoons, making layered clothing essential.
In Bismarck in December, the total precipitation amount is 60 mm (2.4 in), occurring over a span of 9 days.
In Bismarck in December, humidity is 84%. With an average temperature of 2°C (36°F), this humidity feels like a cold, damp blanket wrapping around you, making outdoor activities less inviting and requiring extra layers to stay comfortable while traveling.
In Bismarck in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Bismarck, you can visit Hourly UV Index in Bismarck.
UV Risk Categories
Weather in Bismarck varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Bismarck, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (29°F) | 77 mm (3.0 inches) | 82% | moderate |
| February Weather | 0°C (31°F) | 78 mm (3.1 inches) | 83% | moderate |
| March Weather | 6°C (42°F) | 110 mm (4.3 inches) | 84% | high |
| April Weather | 11°C (52°F) | 110 mm (4.3 inches) | 85% | very high |
| May Weather | 18°C (65°F) | 151 mm (6.0 inches) | 79% | very high |
| June Weather | 23°C (74°F) | 105 mm (4.1 inches) | 82% | extreme |
| July Weather | 25°C (77°F) | 88 mm (3.5 inches) | 80% | very high |
| August Weather | 24°C (75°F) | 111 mm (4.4 inches) | 81% | very high |
| September Weather | 21°C (70°F) | 71 mm (2.8 inches) | 80% | very high |
| October Weather | 14°C (57°F) | 121 mm (4.7 inches) | 82% | high |
| November Weather | 5°C (41°F) | 77 mm (3.0 inches) | 88% | moderate |
| December Weather | 2°C (36°F) | 60 mm (2.4 inches) | 84% | low |