Climate averages 1991–2020
Bismarck weather
in July.
A warm, moderately wet month: the warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a warm month in Bismarck: daytime highs average 27.3°C and nights cool to about 16.7°C. By daytime temperature it is the warmest month of the year.
Expect about 77 mm of rain on roughly 10 days, which makes July a moderately wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 15 h 28 min on an average July day.
The nearest other city in this atlas is Fargo (304 km away). In July its highs average 26.7°C, 0.6°C cooler than Bismarck, with 95 mm of rain.
Among the 498 cities listed in the United States, Bismarck ranks joint 406th of 498 for the warmest July highs and joint 239th of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; Bismarck is 3.0°C cooler than that mean.
From July to August, average highs fall by 0.4°C to 26.9°C, and monthly rainfall falls from 77 mm to 58 mm.
The annual picture
July in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Bismarck climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -5.9°C-15.1°C | -15.1°C | 16 | 4.5 | 9.09 h |
| February | -2.9°C-12.5°C | -12.5°C | 18 | 4.5 | 10.310 h |
| March | 3.8°C-6.6°C | -6.6°C | 26 | 5.0 | 11.912 h |
| April | 11.4°C-0.1°C | -0.1°C | 46 | 7.5 | 13.614 h |
| May | 18.4°C7.3°C | 7.3°C | 73 | 9.8 | 15.015 h |
| June | 23.6°C13.3°C | 13.3°C | 96 | 10.9 | 15.816 h |
| July, selected | 27.3°C16.7°C | 16.7°C | 77 | 9.7 | 15.515 h |
| August | 26.9°C15.9°C | 15.9°C | 58 | 7.4 | 14.214 h |
| September | 21.4°C10.9°C | 10.9°C | 46 | 6.5 | 12.613 h |
| October | 12.7°C3.3°C | 3.3°C | 45 | 6.5 | 10.911 h |
| November | 3.6°C-4.6°C | -4.6°C | 21 | 4.1 | 9.49 h |
| December | -3.4°C-11.4°C | -11.4°C | 18 | 4.4 | 8.69 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
July in nearby cities
- Fargo in JulyUnited States · 304 kmHigh 26.7°C · Low 16.9°C · 95 mm rain
- Rapid City in JulyUnited States · 358 kmHigh 28.9°C · Low 16.9°C · 78 mm rain
- Winnipeg in JulyCanada · 435 kmHigh 24.5°C · Low 15.2°C · 88 mm rain
- Sioux Falls in JulyUnited States · 482 kmHigh 27.7°C · Low 18.2°C · 84 mm rain
- Regina in JulyCanada · 493 kmHigh 24.0°C · Low 13.7°C · 74 mm rain
- Sioux City in JulyUnited States · 591 kmHigh 28.7°C · Low 19.3°C · 75 mm rain
- Plymouth, United States in JulyUnited States · 601 kmHigh 27.1°C · Low 18.5°C · 90 mm rain
- Billings in JulyUnited States · 603 kmHigh 30.7°C · Low 16.6°C · 24 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Bismarck) is explained once on the Bismarck year overview and on the Sources, method and limits page.