Bismarck, ND Weather
Bismarck hourly forecast: next 24 hours
Today's high of 95°F (35°C) is about 14°F (8°C) above the typical August high of 81°F (27°C).
Current conditions in detail
Bismarck weather tomorrow (Friday, August 7)
Tomorrow in Bismarck looks sunny, with a high of 86° and an overnight low of 53°. Rain is unlikely (1% chance). Winds top out near 19 mph, and the UV index reaches 6 (moderate).
Bismarck 14-day forecast
About the weather in Bismarck
Weather in Bismarck is shaped by its humid continental climate - expect warm summers and cold, often snowy winters. July afternoons typically reach 83°F (28°C), while January highs hover near 24°F (-5°C). Annual precipitation averages 19.1 inches (485 mm) over about 78 rainy days.
Bismarck weather: quick facts
- Hottest month: July - highs near 83°F (28°C)
- Coldest month: January - highs near 24°F (-5°C)
- Record high: 100°F (38°C) · Record low: -32°F (-36°C) (2015–2024)
- Wettest month: June (8 rainy days) · Sunniest: July (13.5 h sun/day)
- Climate type: humid continental - warm summers and cold, often snowy winters
- Snow: about 18 days a year
Temperatures through the year
The warmest stretch of the year centers on July. Highs average 83°F (28°C) and overnight lows stay near 63°F (17°C). The coolest month is January, with typical highs of 24°F (-5°C) and lows around 8°F (-14°C). Based on 2015–2024 weather data, temperatures have reached as high as 100°F (38°C) and dropped as low as -32°F (-36°C).
Rain, sun and snow
June is usually the wettest month. It brings about 2.7 inches (70 mm) of rain over 8 days, while January is the driest. July brings the most sunshine, averaging 13.5 hours of sun a day. Snow falls on about 18 days in a typical year, mostly from October through April.
Season by season
Spring (March through May)
Spring in Bismarck is brisk and cold, with daytime highs averaging 53°F (11°C) and nights around 32°F (0°C); expect showers on roughly 24 days across the season, plus around 5 snowy days.
Summer (June through August)
Summer in Bismarck is hot, with daytime highs averaging 81°F (27°C) and nights around 60°F (16°C); expect showers on roughly 23 days across the season.
Fall (September through November)
Fall in Bismarck is crisp but comfortable, with daytime highs averaging 56°F (14°C) and nights around 39°F (4°C); rain falls on about 16 days over the three months, plus around 3 snowy days.
Winter (December through February)
Winter in Bismarck is bitterly cold, with daytime highs averaging 26°F (-3°C) and nights around 9°F (-13°C); rain falls on about 14 days over the three months, plus around 9 snowy days. Wind makes those temperatures feel harsher than they sound - pair the forecast winds with the wind speed converter to judge conditions on exposed skin.
Average temperatures in Bismarck by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 24° | 8° | 4 | 0.5 in | 5.9 h/day | 78% |
| February | 27° | 8° | 4 | 0.6 in | 7.8 h/day | 69% |
| March | 40° | 20° | 6 | 0.9 in | 8.9 h/day | 68% |
| April | 51° | 31° | 8 | 1.9 in | 9.3 h/day | 62% |
| May | 67° | 45° | 10 | 2.6 in | 11.4 h/day | 61% |
| June | 78° | 57° | 8 | 2.7 in | 13.1 h/day | 60% |
| July | 83° | 63° | 8 | 2.1 in | 13.5 h/day | 62% |
| August | 81° | 60° | 6 | 2.4 in | 11.8 h/day | 63% |
| September | 73° | 53° | 7 | 2.0 in | 9.9 h/day | 63% |
| October | 56° | 38° | 5 | 1.5 in | 8.0 h/day | 64% |
| November | 40° | 24° | 4 | 0.8 in | 6.5 h/day | 70% |
| December | 27° | 12° | 6 | 1.0 in | 5.6 h/day | 75% |