WEATHER IN Great Falls
Monthly temperature
| Month | Record low | Average low | Average | Average high | Record high |
| january | -44 (1909) | 15.0 | 25.2 | 35.3 | 67 (1992) |
| february | -49 (1936) | 15.4 | 26.2 | 37.1 | 84 (1892) |
| march | -32 (1932) | 22.1 | 34.1 | 46.1 | 80 (1892) |
| april | -10 (1936) | 29.9 | 42.4 | 54.9 | 89 (1980) |
| may | 12 (2009) | 38.4 | 51.5 | 64.6 | 100 (1919) |
| june | 31 (1950) | 45.9 | 59.4 | 72.8 | 102 (1919) |
| july | 35 (1894) | 51.4 | 67.9 | 84.3 | 107 (1933) |
| august | 30 (1992) | 50.3 | 66.7 | 83.2 | 106 (1961) |
| september | 10 (1926) | 42.8 | 57.2 | 71.7 | 100 (1893) |
| october | -11 (1991) | 32.6 | 44.8 | 57.0 | 91 (1992) |
| november | -25 (1903) | 23.6 | 33.6 | 43.7 | 76 (1975) |
| december | -43 (1968) | 16.3 | 26.0 | 35.6 | 69 (1939) |
| year | -49 (1936) | 32.0 | 44.5 | 57.1 | 107 (1933) |
Monthly precipitation
| Month | Average | Record low | Record high | Daily high |
| january | 0.55 | 0.00 (1944) | 2.05 (1969) | 0.72 (1955) |
| february | 0.59 | 0.01 (1950) | 2.16 (1958) | 0.93 (1897) |
| march | 0.68 | 0.08 (1916) | 2.27 (1908) | 1.06 (1977) |
| april | 1.73 | 0.05 (1902) | 4.63 (1975) | 2.20 (1951) |
| may | 2.43 | 0.21 (1895) | 8.13 (1953) | 2.75 (1902) |
| june | 2.72 | 0.52 (1960) | 8.01 (1923) | 3.36 (1907) |
| july | 1.23 | 0.04 (1959) | 5.45 (1909) | 1.61 (1983) |
| august | 1.22 | 0.03 (1969) | 5.34 (1933) | 2.72 (1933) |
| september | 1.33 | 0.00 (1932) | 3.56 (1941) | 1.56 (1982) |
| october | 1.07 | 0.00 (1964) | 3.43 (1975) | 1.39 (1908) |
| november | 0.68 | 0.00 (1907) | 2.27 (1955) | 1.14 (1906) |
| december | 0.53 | 0.00 (1954) | 2.49 (1917) | 0.74 (2010) |
| year | 14.75 | 6.26 (1904) | 25.24 (1975) | 3.36 (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 |