Williston Climate by Month
Williston, North Dakota, United States
Warm summers and bitterly cold winters, with rain spread through the year.
The climate in Williston is one of warm summers and bitterly cold winters, with rain spread through the year. July is the warmest month, with highs around 85°F (30°C); January is the coolest at 23°F (-5°C), and nights dip to 2°F (-17°C). It gets 15 in (373 mm) of rain a year, spread across the months.
- Warmest month
- 85°F(30°C)
- Average high, July
- Coldest nights
- 2°F(-17°C)
- Average low, January
- Rain per year
- 15 in(373 mm)
- No clear rainy season
- Humidity
- 69%
- Sunniest: July
Best and worst months in Williston
Best for weatherThe most comfortable weather comes in September, with highs around 74°F (23°C) and about 1.3 in (34 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 23°F (-5°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in September.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Williston weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 23°F(-5°C) | 2°F(-17°C) | 0.5 in(12 mm) | 100% | 1.2 |
| FebFebruary | 28°F(-2°C) | 6°F(-14°C) | 0.4 in(9 mm) | 90% | 2.1 |
| MarMarch | 42°F(5°C) | 19°F(-7°C) | 0.7 in(18 mm) | 70% | 3.6 |
| AprApril | 57°F(14°C) | 31°F(-1°C) | 1.1 in(27 mm) | 51% | 4.8 |
| MayMay | 69°F(20°C) | 42°F(6°C) | 2.1 in(54 mm) | 53% | 5.8 |
| JunJune | 78°F(26°C) | 52°F(11°C) | 2.6 in(65 mm) | 61% | 5.9 |
| JulJuly | 85°F(30°C) | 58°F(14°C) | 2.5 in(63 mm) | 61% | 6.7 |
| AugAugust | 84°F(29°C) | 55°F(13°C) | 1.6 in(41 mm) | 56% | 5.6 |
| SepSeptemberBest | 74°F(23°C) | 46°F(8°C) | 1.3 in(34 mm) | 57% | 4.1 |
| OctOctober | 57°F(14°C) | 32°F(0°C) | 0.9 in(22 mm) | 60% | 2.4 |
| NovNovember | 39°F(4°C) | 18°F(-8°C) | 0.6 in(16 mm) | 75% | 1.4 |
| DecDecember | 27°F(-3°C) | 7°F(-14°C) | 0.5 in(12 mm) | 93% | 1.0 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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