Roy, Montana
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 32° -41° (1997) 69° (1992) 0.5" 9"
February 13° 38° -39° (1996) 72° (1992) 0.31" 6.1"
March 22° 46° -33° (1989) 81° (2004) 0.81" 8"
April 31° 58° -5° (1986) 90° (1980) 1.14" 6.6"
May 40° 67° 10° (1954) 96° (1980) 2.73" 1.2"
June 48° 77° 29° (1969) 103° (1984) 2.3" 0.1"
July 53° 85° 36° (1972) 105° (2003) 1.97" 0"
August 52° 85° 30° (1992) 107° (1983) 1.53" 0"
September 42° 73° 16° (1985) 103° (1983) 1.22" 0.2"
October 32° 61° -11° (1991) 92° (1992) 0.73" 2.3"
November 20° 44° -29° (1959) 78° (1999) 0.44" 5.3"
December 10° 34° -41° (1989) 69° (1956) 0.5" 8.5"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Apr 1 27° 52° -5° (1975) 73° (1991) 0.03" NA
Apr 2 27° 53° 1° (1954) 77° (1992) 0.03" NA
Apr 3 27° 53° 7° (2002) 80° (1992) 0.03" NA
Apr 4 28° 53° 12° (1968) 74° (1987) 0.03" NA
Apr 5 28° 54° 8° (1975) 78° (1969) 0.03" NA
Apr 6 28° 54° 3° (1979) 80° (1969) 0.03" NA
Apr 7 28° 55° 9° (1997) 83° (2005) 0.03" NA
Apr 8 29° 55° 0° (1982) 79° (1977) 0.03" NA
Apr 9 29° 55° 14° (1997) 81° (1996) 0.03" NA
Apr 10 29° 56° 5° (1990) 79° (1996) 0.03" NA
Apr 11 30° 56° 5° (1997) 80° (1949) 0.03" NA
Apr 12 30° 56° 2° (1997) 80° (1976) 0.03" NA
Apr 13 30° 57° 11° (1983) 76° (1958) 0.03" NA
Apr 14 31° 57° -5° (1986) 81° (1963) 0.03" NA
Apr 15 31° 57° 10° (1986) 85° (1962) 0.03" NA
Apr 16 31° 58° 11° (1951) 79° (1977) 0.03" NA
Apr 17 31° 58° 12° (1970) 81° (1980) 0.03" NA
Apr 18 32° 59° 10° (1951) 81° (1952) 0.04" NA
Apr 19 32° 59° 8° (1951) 86° (1962) 0.04" NA
Apr 20 32° 59° 10° (1966) 90° (1980) 0.04" NA
Apr 21 33° 60° 17° (1951) 82° (1989) 0.04" NA
Apr 22 33° 60° 2° (1967) 82° (1969) 0.04" NA
Apr 23 33° 60° 14° (1967) 82° (1962) 0.05" NA
Apr 24 34° 61° 21° (2002) 87° (1962) 0.05" NA
Apr 25 34° 61° 15° (1960) 86° (1952) 0.05" NA
Apr 26 34° 61° 12° (1988) 89° (1952) 0.05" NA
Apr 27 34° 62° 17° (1958) 84° (1987) 0.05" NA
Apr 28 35° 62° 13° (1954) 88° (1949) 0.06" NA
Apr 29 35° 62° 8° (1954) 86° (1992) 0.06" NA
Apr 30 35° 63° 19° (1950) 86° (1968) 0.06" NA
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