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
Aug 1 54° 87° 42° (1950) 102° (1955) 0.06" NA
Aug 2 54° 87° 45° (1957) 99° (1969) 0.05" NA
Aug 3 54° 87° 36° (1978) 101° (1983) 0.05" NA
Aug 4 54° 87° 40° (1988) 104° (1961) 0.05" NA
Aug 5 54° 87° 41° (1980) 107° (1961) 0.05" NA
Aug 6 54° 87° 40° (1959) 107° (1983) 0.05" NA
Aug 7 54° 87° 43° (1960) 103° (2001) 0.05" NA
Aug 8 54° 87° 42° (1980) 100° (1991) 0.05" NA
Aug 9 54° 86° 40° (1960) 101° (1991) 0.05" NA
Aug 10 54° 86° 40° (1986) 101° (1984) 0.05" NA
Aug 11 53° 86° 37° (1977) 102° (1983) 0.05" NA
Aug 12 53° 86° 35° (1987) 99° (1970) 0.05" NA
Aug 13 53° 86° 43° (1968) 100° (2003) 0.05" NA
Aug 14 53° 86° 36° (1959) 102° (1971) 0.05" NA
Aug 15 53° 86° 42° (1974) 101° (1990) 0.05" NA
Aug 16 53° 85° 41° (1952) 103° (2003) 0.05" NA
Aug 17 52° 85° 33° (2002) 98° (1958) 0.05" NA
Aug 18 52° 85° 38° (1978) 102° (1964) 0.05" NA
Aug 19 52° 84° 36° (1950) 98° (1992) 0.05" NA
Aug 20 52° 84° 39° (1950) 100° (1971) 0.05" NA
Aug 21 51° 84° 41° (1950) 101° (1969) 0.05" NA
Aug 22 51° 84° 38° (1992) 101° (1976) 0.05" NA
Aug 23 51° 83° 36° (1992) 104° (1969) 0.05" NA
Aug 24 50° 83° 37° (1966) 105° (1969) 0.05" NA
Aug 25 50° 82° 30° (1992) 99° (1970) 0.05" NA
Aug 26 50° 82° 38° (1992) 98° (1966) 0.05" NA
Aug 27 49° 82° 33° (1988) 100° (1971) 0.05" NA
Aug 28 49° 81° 34° (1988) 95° (1971) 0.05" NA
Aug 29 49° 81° 34° (1960) 95° (1948) 0.04" NA
Aug 30 48° 80° 33° (1992) 101° (1954) 0.04" NA
Aug 31 48° 80° 35° (1956) 102° (1955) 0.04" NA
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