WEATHER IN Williston
Monthly temperature
| Month | Record low | Average low | Average | Average high | Record high |
| january | -42 (1912) | 1.0 | 11.6 | 22.1 | 58 (2012) |
| february | -50 (1936) | 5.5 | 16.1 | 26.7 | 66 (1992) |
| march | -35 (1897) | 17.5 | 28.8 | 40.1 | 84 (1910) |
| april | -15 (1975) | 29.2 | 42.4 | 55.6 | 92 (1980) |
| may | 10 (2005) | 40.2 | 53.8 | 67.4 | 106 (1980) |
| june | 26 (1998) | 50.2 | 63.5 | 76.7 | 108 (1931) |
| july | 34 (1967) | 56.3 | 70.4 | 84.5 | 110 (1936) |
| august | 32 (1911) | 54.0 | 69.0 | 83.9 | 108 (1949) |
| september | 13 (1907) | 43.5 | 58.0 | 72.6 | 104 (1983) |
| october | -9 (2002) | 30.4 | 43.2 | 55.9 | 93 (1897) |
| november | -27 (1996) | 17.1 | 27.8 | 38.4 | 76 (1999) |
| december | -50 (1983) | 6.1 | 16.1 | 26.1 | 63 (1939) |
| year | -50 (1936) | 28.8 | 41.5 | 54.1 | 110 (1936) |
Monthly precipitation
| Month | Average | Record low | Record high | Daily high |
| january | 0.56 | 0.01 (1898) | 2.02 (1896) | 0.62 (1991) |
| february | 0.48 | 0.00 (1934) | 1.75 (1998) | 0.70 (1878) |
| march | 0.63 | 0.01 (1966) | 2.26 (1975) | 1.39 (1983) |
| april | 1.05 | 0.00 (1931) | 3.31 (1967) | 2.20 (2006) |
| may | 2.10 | 0.06 (1958) | 7.38 (1965) | 1.73 (1959) |
| june | 2.64 | 0.43 (1961) | 8.84 (1901) | 3.05 (1973) |
| july | 2.48 | 0.02 (1894) | 6.62 (1997) | 4.93 (1963) |
| august | 1.57 | 0.03 (2001) | 5.06 (1947) | 2.50 (1955) |
| september | 1.36 | 0.01 (1899) | 3.74 (1959) | 1.60 (1998) |
| october | 0.94 | 0.00 (1944) | 3.56 (1971) | 1.82 (1891) |
| november | 0.67 | 0.00 (1928) | 3.31 (2000) | 1.98 (1969) |
| december | 0.63 | 0.00 (1913) | 2.50 (2008) | 0.92 (1935) |
| year | 14.37 | 6.13 (1934) | 22.04 (1896) | 4.93 (1963) |
Number of days with solid, liquid, and mixed precipitation
| Type of precipitation | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
Wind speed, m/s
| jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
The frequency of different wind directions, %
| direction | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
Air humidity, %
| jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
Snow cover
| Month | jul | aug | sep | oct | nov | dec | jan | feb | mar | apr | may | jun | Year |
| number of days | |||||||||||||
| height (sm) | |||||||||||||
| max height (sm) |
Cloudy, score
| month | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
| total | |||||||||||||
| low |
Number of clear, cloudy and cloudy days
| month | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
| Total cloud | |||||||||||||
| Low cloud | |||||||||||||
Number of days with different phenomena
| phenomenon | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
The frequency of different types of clouds, %
| type of clouds | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |