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The temperatures in Bismarck in May are quite cold with temperatures between 8°C and 18°C, warm clothes are a must.
You can expect rain for roughly half of the month of May in Bismarck. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Please note that Bismarck can expect a few days of snow in May.
Our weather forecast can give you a great sense of what weather to expect in Bismarck in May 2025.
If you’re planning to visit Bismarck in the near future, we highly recommend that you review the 14 day weather forecast for Bismarck before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -7° / -14° | 4 | 11 | 16 | 31 mm | Awful | Bismarck in January |
| February | -6° / -14° | 3 | 9 | 16 | 31 mm | Awful | Bismarck in February |
| March | 3° / -4° | 6 | 12 | 13 | 53 mm | Awful | Bismarck in March |
| April | 10° / 1° | 6 | 17 | 7 | 75 mm | Bad | Bismarck in April |
| May | 18° / 8° | 8 | 22 | 1 | 122 mm | Ok | Bismarck in May |
| June | 25° / 14° | 7 | 23 | 0 | 132 mm | Good | Bismarck in June |
| July | 29° / 17° | 4 | 27 | 0 | 84 mm | Good | Bismarck in July |
| August | 28° / 16° | 4 | 27 | 0 | 77 mm | Perfect | Bismarck in August |
| September | 23° / 12° | 4 | 26 | 0 | 63 mm | Perfect | Bismarck in September |
| October | 12° / 4° | 4 | 23 | 4 | 60 mm | Bad | Bismarck in October |
| November | 4° / -3° | 3 | 18 | 9 | 24 mm | Awful | Bismarck in November |
| December | -5° / -11° | 3 | 11 | 16 | 40 mm | Awful | Bismarck in December |