WEATHER IN Great Falls
Climate tables. Data for Great Falls.
Monthly temperature
| Month | Record low | Average low | Average | Average high | Record high |
| january | -42.2 (1909) | -9.4 | -3.8 | 1.8 | 19.4 (1992) |
| february | -45.0 (1936) | -9.2 | -3.2 | 2.8 | 28.9 (1892) |
| march | -35.6 (1932) | -5.5 | 1.2 | 7.8 | 26.7 (1892) |
| april | -23.3 (1936) | -1.2 | 5.8 | 12.7 | 31.7 (1980) |
| may | -11.1 (2009) | 3.6 | 10.8 | 18.1 | 37.8 (1919) |
| june | -0.6 (1950) | 7.7 | 15.2 | 22.7 | 38.9 (1919) |
| july | 1.7 (1894) | 10.8 | 19.9 | 29.1 | 41.7 (1933) |
| august | -1.1 (1992) | 10.2 | 19.3 | 28.4 | 41.1 (1961) |
| september | -12.2 (1926) | 6.0 | 14.0 | 22.1 | 37.8 (1893) |
| october | -23.9 (1991) | 0.3 | 7.1 | 13.9 | 32.8 (1992) |
| november | -31.7 (1903) | -4.7 | 0.9 | 6.5 | 24.4 (1975) |
| december | -41.7 (1968) | -8.7 | -3.3 | 2.0 | 20.6 (1939) |
| year | -45.0 (1936) | 0.0 | 6.9 | 13.9 | 41.7 (1933) |
Monthly precipitation
| Month | Average | Record low | Record high | Daily high |
| january | 14 | 0.0 (1944) | 52 (1969) | 18 (1955) |
| february | 15 | 0.3 (1950) | 55 (1958) | 24 (1897) |
| march | 17 | 2 (1916) | 58 (1908) | 27 (1977) |
| april | 44 | 1 (1902) | 118 (1975) | 56 (1951) |
| may | 62 | 5 (1895) | 207 (1953) | 70 (1902) |
| june | 69 | 13 (1960) | 204 (1923) | 85 (1907) |
| july | 31 | 1 (1959) | 138 (1909) | 41 (1983) |
| august | 31 | 0.8 (1969) | 136 (1933) | 69 (1933) |
| september | 34 | 0.0 (1932) | 90 (1941) | 40 (1982) |
| october | 27 | 0.0 (1964) | 87 (1975) | 35 (1908) |
| november | 17 | 0.0 (1907) | 58 (1955) | 29 (1906) |
| december | 14 | 0.0 (1954) | 63 (1917) | 19 (2010) |
| year | 375 | 159 (1904) | 641 (1975) | 85 (1907) |
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 |