Grass Range, Montana
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 14° 38° -40° (1969) 74° (1981) 0.61" 8.3"
February 16° 40° -34° (1996) 73° (1992) 0.41" 6.4"
March 23° 48° -32° (1960) 80° (1978) 1" 10.3"
April 31° 57° -5° (1986) 94° (1987) 1.56" 4.6"
May 40° 66° 6° (1954) 97° (1980) 3.13" 0.8"
June 47° 74° 27° (1969) 103° (1988) 2.95" 0"
July 53° 83° 31° (1994) 104° (1985) 1.85" 0"
August 51° 83° 29° (1992) 105° (1961) 1.54" 0"
September 42° 71° 15° (1985) 100° (1950) 1.19" 0.3"
October 33° 59° -9° (1991) 90° (1987) 1.05" 3"
November 22° 46° -26° (1955) 85° (1975) 0.63" 4.9"
December 14° 37° -39° (1983) 70° (1988) 0.66" 8.6"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
May 1 35° 62° 15° (1954) 86° (1981) 0.07" 0.1"
May 2 35° 63° 6° (1954) 89° (1985) 0.07" 0"
May 3 35° 63° 8° (1954) 90° (1985) 0.08" 0.1"
May 4 36° 63° 9° (1954) 85° (1966) 0.07" 0"
May 5 36° 63° 20° (2006) 86° (1966) 0.07" 0.1"
May 6 36° 64° 22° (1999) 88° (1966) 0.08" 0"
May 7 37° 64° 25° (1955) 87° (1987) 0.08" 0.1"
May 8 37° 64° 25° (1961) 88° (1987) 0.08" 0"
May 9 37° 65° 18° (2002) 88° (1977) 0.09" 0.1"
May 10 38° 65° 21° (1968) 90° (1977) 0.09" 0"
May 11 38° 65° 21° (1953) 90° (1960) 0.1" 0"
May 12 38° 65° 20° (1966) 90° (2001) 0.1" 0.1"
May 13 39° 66° 21° (1953) 89° (2001) 0.1" 0"
May 14 39° 66° 22° (1953) 88° (1987) 0.11" 0"
May 15 39° 66° 27° (1986) 90° (1987) 0.11" 0"
May 16 40° 66° 27° (1974) 89° (1988) 0.11" 0.1"
May 17 40° 67° 27° (1974) 89° (1988) 0.11" 0"
May 18 40° 67° 26° (1968) 87° (1992) 0.11" 0"
May 19 41° 67° 26° (1997) 93° (1954) 0.11" 0"
May 20 41° 67° 27° (1968) 89° (1958) 0.11" 0"
May 21 41° 68° 23° (1963) 93° (1980) 0.11" 0.1"
May 22 41° 68° 28° (1963) 97° (1980) 0.11" 0"
May 23 42° 68° 28° (1949) 95° (1980) 0.1" 0"
May 24 42° 68° 28° (1954) 92° (1988) 0.12" 0"
May 25 42° 68° 27° (1950) 89° (1958) 0.11" 0"
May 26 43° 69° 28° (1975) 90° (1969) 0.12" 0"
May 27 43° 69° 33° (1954) 90° (1966) 0.11" 0"
May 28 43° 69° 31° (1952) 93° (1958) 0.13" 0"
May 29 44° 69° 31° (1954) 94° (1988) 0.12" 0"
May 30 44° 70° 32° (1954) 92° (1986) 0.12" 0"
May 31 44° 70° 27° (1982) 91° (1972) 0.13" 0"
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