Grass Range, Montana
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 11° 35° -40° (1969) 74° (1981) 0.79" NA
February 16° 40° -34° (1996) 73° (1992) 0.31" NA
March 22° 47° -32° (1960) 80° (1978) 0.99" NA
April 31° 57° -5° (1986) 94° (1987) 1.44" NA
May 39° 66° 6° (1954) 97° (1980) 3.08" NA
June 47° 75° 27° (1969) 103° (1988) 2.81" NA
July 51° 81° 31° (1994) 104° (1985) 2.06" NA
August 50° 82° 29° (1992) 105° (1961) 1.59" NA
September 41° 71° 15° (1985) 100° (1950) 1.27" NA
October 32° 60° -9° (1991) 90° (1987) 0.92" NA
November 21° 44° -26° (1955) 85° (1975) 0.61" NA
December 13° 37° -39° (1983) 70° (1988) 0.64" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Dec 1 16° 39° -18° (1985) 70° (1988) 0.02" NA
Dec 2 16° 39° -27° (1985) 66° (1959) 0.02" NA
Dec 3 16° 39° -17° (1972) 67° (1987) 0.02" NA
Dec 4 16° 39° -23° (1972) 68° (1988) 0.02" NA
Dec 5 15° 39° -23° (1956) 60° (1963) 0.02" NA
Dec 6 15° 38° -31° (1956) 63° (1981) 0.02" NA
Dec 7 15° 38° -27° (1956) 60° (1987) 0.02" NA
Dec 8 15° 38° -36° (1972) 62° (1990) 0.02" NA
Dec 9 15° 38° -29° (1977) 67° (1975) 0.02" NA
Dec 10 14° 38° -16° (1972) 60° (1973) 0.02" NA
Dec 11 14° 38° -23° (1961) 63° (1957) 0.02" NA
Dec 12 14° 37° -19° (1949) 64° (1962) 0.02" NA
Dec 13 14° 37° -14° (1972) 63° (1960) 0.02" NA
Dec 14 14° 37° -20° (1951) 65° (1997) 0.02" NA
Dec 15 14° 37° -24° (1951) 69° (1962) 0.02" NA
Dec 16 13° 37° -31° (1964) 67° (1980) 0.02" NA
Dec 17 13° 37° -24° (1964) 67° (1976) 0.02" NA
Dec 18 13° 37° -29° (1955) 67° (1979) 0.02" NA
Dec 19 13° 36° -22° (1990) 66° (2004) 0.02" NA
Dec 20 13° 36° -27° (1951) 62° (1954) 0.02" NA
Dec 21 13° 36° -37° (1989) 65° (1954) 0.02" NA
Dec 22 12° 36° -37° (1989) 60° (1954) 0.02" NA
Dec 23 12° 36° -24° (1983) 58° (1950) 0.02" NA
Dec 24 12° 36° -39° (1983) 63° (1999) 0.02" NA
Dec 25 12° 36° -20° (1983) 59° (1950) 0.02" NA
Dec 26 12° 35° -23° (1996) 64° (1980) 0.02" NA
Dec 27 12° 35° -22° (1965) 67° (1980) 0.02" NA
Dec 28 12° 35° -31° (1984) 62° (1956) 0.02" NA
Dec 29 11° 35° -36° (1968) 68° (1956) 0.02" NA
Dec 30 11° 35° -32° (1968) 63° (1980) 0.03" NA
Dec 31 11° 35° -26° (1992) 59° (1963) 0.03" NA
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