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Williston, North Dakota climate
Dfb Warm-summer humid continental
Williston has a strongly seasonal cold-temperate climate (Warm-summer humid continental, Köppen Dfb). The hottest month is July with an average daily high near 87°F, while the coldest is January averaging around 1°F at night. Precipitation totals about 16 inches a year and is strongly seasonal — July alone averages 2.8 inches while February barely receives 0.51 inches.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Williston climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 24 | 29 | 43 | 59 | 70 | 79 | 87 | 87 | 76 | 59 | 41 | 28 |
| Avg temp (°F) | 13 | 17 | 30 | 44 | 55 | 64 | 71 | 70 | 59 | 45 | 29 | 17 |
| Avg low (°F) | 1 | 5 | 17 | 29 | 39 | 49 | 55 | 53 | 43 | 30 | 17 | 6 |
| Precipitation (in) | 0.6 | 0.5 | 0.7 | 1.1 | 2.2 | 2.8 | 2.8 | 1.6 | 1.5 | 1.0 | 0.7 | 0.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 24 | 29 | 43 | 59 | 70 | 79 |
| Avg temp (°F) | 13 | 17 | 30 | 44 | 55 | 64 |
| Avg low (°F) | 1 | 5 | 17 | 29 | 39 | 49 |
| Precipitation (in) | 0.6 | 0.5 | 0.7 | 1.1 | 2.2 | 2.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 87 | 87 | 76 | 59 | 41 | 28 |
| Avg temp (°F) | 71 | 70 | 59 | 45 | 29 | 17 |
| Avg low (°F) | 55 | 53 | 43 | 30 | 17 | 6 |
| Precipitation (in) | 2.8 | 1.6 | 1.5 | 1.0 | 0.7 | 0.7 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 64 | 63 | 66 | 65 | 64 | 61 | 49 | 50 | 55 | 65 | 67 | 67 |
| Relative humidity (%) | 86 | 79 | 68 | 59 | 56 | 56 | 52 | 52 | 56 | 65 | 75 | 84 |
| Wind speed (mph) | 8.2 | 8.2 | 8.8 | 8.7 | 8.3 | 7.7 | 6.8 | 6.9 | 7.5 | 8.2 | 8.1 | 8.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 64 | 63 | 66 | 65 | 64 | 61 |
| Relative humidity (%) | 86 | 79 | 68 | 59 | 56 | 56 |
| Wind speed (mph) | 8.2 | 8.2 | 8.8 | 8.7 | 8.3 | 7.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 49 | 50 | 55 | 65 | 67 | 67 |
| Relative humidity (%) | 52 | 52 | 56 | 65 | 75 | 84 |
| Wind speed (mph) | 6.8 | 6.9 | 7.5 | 8.2 | 8.1 | 8.2 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 29 years of daily observations at Sloulin Field International Airport, a weather station, about 3 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.