Roy, Montana
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 10° 35° -41° (1997) 69° (1992) 0.36" 7.1"
February 14° 38° -39° (1996) 72° (1992) 0.31" 5"
March 22° 48° -33° (1989) 81° (2004) 0.68" 6.9"
April 31° 58° -5° (1986) 90° (1980) 1.11" 3"
May 40° 67° 10° (1954) 96° (1980) 2.77" 1.1"
June 49° 76° 29° (1969) 103° (1984) 2.35" 0.1"
July 54° 86° 36° (1972) 105° (2003) 1.76" 0"
August 52° 86° 30° (1992) 107° (1983) 1.26" 0"
September 43° 74° 16° (1985) 103° (1983) 1.15" 0.3"
October 32° 60° -11° (1991) 92° (1992) 0.85" 2.1"
November 20° 46° -29° (1959) 78° (1999) 0.41" 4.7"
December 10° 35° -41° (1989) 69° (1956) 0.49" 6.5"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jan 1 34° -24° (1952) 62° (1964) 0.01" 0.2"
Jan 2 34° -26° (1950) 58° (1992) 0.02" 0.3"
Jan 3 34° -35° (1950) 58° (1992) 0.01" 0.3"
Jan 4 34° -31° (1950) 58° (1984) 0.01" 0.2"
Jan 5 34° -23° (2004) 59° (2001) 0.02" 0.3"
Jan 6 34° -29° (1982) 57° (2003) 0.01" 0.2"
Jan 7 34° -22° (1968) 65° (2003) 0.01" 0.3"
Jan 8 34° -30° (1970) 68° (1958) 0.02" 0.2"
Jan 9 34° -25° (1949) 69° (1953) 0.01" 0.3"
Jan 10 34° -28° (1949) 60° (1992) 0.01" 0.2"
Jan 11 34° -41° (1997) 68° (1953) 0.01" 0.3"
Jan 12 34° -37° (1997) 66° (1987) 0.02" 0.2"
Jan 13 34° -32° (1997) 59° (1996) 0.01" 0.3"
Jan 14 35° -32° (1972) 59° (1973) 0.01" 0.2"
Jan 15 10° 35° -37° (1950) 65° (1973) 0.01" 0.2"
Jan 16 10° 35° -28° (1982) 67° (1974) 0.01" 0.3"
Jan 17 10° 35° -33° (1950) 58° (1974) 0.02" 0.2"
Jan 18 10° 35° -32° (1950) 57° (1991) 0.01" 0.2"
Jan 19 10° 35° -29° (1963) 63° (2005) 0.01" 0.3"
Jan 20 10° 35° -40° (1954) 63° (1992) 0.01" 0.2"
Jan 21 10° 35° -35° (1949) 60° (1981) 0.01" 0.2"
Jan 22 10° 35° -23° (1982) 65° (1981) 0.01" 0.2"
Jan 23 10° 35° -34° (1969) 68° (2005) 0.01" 0.2"
Jan 24 11° 35° -41° (1969) 68° (2005) 0.01" 0.2"
Jan 25 11° 35° -40° (1957) 60° (1953) 0.01" 0.2"
Jan 26 11° 35° -32° (1950) 53° (1998) 0.01" 0.2"
Jan 27 11° 35° -33° (1972) 60° (1986) 0.01" 0.2"
Jan 28 11° 36° -34° (1969) 61° (1992) 0.01" 0.2"
Jan 29 11° 36° -31° (1950) 55° (1992) 0.01" 0.2"
Jan 30 11° 36° -34° (1996) 63° (1992) 0.01" 0.2"
Jan 31 11° 36° -28° (1969) 69° (1992) 0.01" 0.2"
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