US Geography / US Weather / North Dakota Weather / Williston |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 18 | 26 | 38 | 55 | 68 | 78 | 84 | 84 | 70 | 58 | 38 | 24 |
| Avg. Low | -1 | 5 | 17 | 30 | 42 | 51 | 56 | 54 | 42 | 31 | 16 | 2 |
| Mean | 8 | 16 | 28 | 44 | 55 | 65 | 71 | 68 | 56 | 45 | 27 | 14 |
| Avg. Precip. | 0.5 in | 0.4 in | 0.7 in | 1.3 in | 2.0 in | 2.3 in | 2.1 in | 1.3 in | 1.3 in | 0.8 in | 0.5 in | 0.6 in |
Degrees in Fahrenheit
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