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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