Climate in Bismarck: average temperature by month
In Bismarck the warmest month is July, with 28.6 °C on average in the afternoon; the coolest is January, with -6.1 °C.
The average of the weather stations Eureka (146 km) and Jamestown State Hosp (160 km); nearer ones count more.
| Month | Average high | Coolest to warmest day |
|---|---|---|
| January | -6.1 °C | -6.6 °C – -5.3 °C |
| February | -4.0 °C | -5.3 °C – -1.4 °C |
| March | 3.6 °C | -0.9 °C – 7.4 °C |
| April | 12.1 °C | 7.7 °C – 16.1 °C |
| May | 20.0 °C | 16.2 °C – 23.8 °C |
| June | 25.7 °C | 24.1 °C – 27.3 °C |
| July | 28.6 °C | 27.4 °C – 29.1 °C |
| August | 27.5 °C | 26.2 °C – 28.7 °C |
| September | 22.7 °C | 19.3 °C – 25.9 °C |
| October | 14.2 °C | 9.3 °C – 19.1 °C |
| November | 4.2 °C | 0.0 °C – 8.8 °C |
| December | -3.5 °C | -6.0 °C – -0.3 °C |