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
Jul 1 51° 81° 42° (1949) 99° (1990) 0.07" NA
Jul 2 51° 82° 39° (1968) 98° (1985) 0.07" NA
Jul 3 52° 82° 38° (1972) 100° (1996) 0.07" NA
Jul 4 52° 82° 36° (1972) 101° (1996) 0.07" NA
Jul 5 52° 83° 40° (1982) 101° (1981) 0.07" NA
Jul 6 52° 83° 41° (1972) 100° (1983) 0.07" NA
Jul 7 52° 83° 40° (1988) 100° (1983) 0.07" NA
Jul 8 52° 83° 41° (1992) 102° (1963) 0.07" NA
Jul 9 52° 83° 41° (1971) 97° (1970) 0.07" NA
Jul 10 53° 84° 44° (1999) 101° (1973) 0.07" NA
Jul 11 53° 84° 37° (1951) 99° (1973) 0.07" NA
Jul 12 53° 84° 43° (1951) 104° (2002) 0.06" NA
Jul 13 53° 84° 44° (1952) 104° (2002) 0.06" NA
Jul 14 53° 85° 40° (1977) 103° (2002) 0.06" NA
Jul 15 53° 85° 38° (1958) 101° (2002) 0.06" NA
Jul 16 53° 85° 41° (1999) 103° (1966) 0.06" NA
Jul 17 53° 85° 39° (1950) 102° (1955) 0.06" NA
Jul 18 53° 85° 42° (1950) 105° (1955) 0.06" NA
Jul 19 53° 85° 41° (1972) 103° (1960) 0.06" NA
Jul 20 53° 86° 44° (1987) 100° (1954) 0.06" NA
Jul 21 54° 86° 43° (1949) 100° (1963) 0.06" NA
Jul 22 54° 86° 45° (1950) 105° (1963) 0.06" NA
Jul 23 54° 86° 41° (1950) 105° (2003) 0.06" NA
Jul 24 54° 86° 44° (1950) 104° (2003) 0.06" NA
Jul 25 54° 86° 44° (1971) 99° (1988) 0.06" NA
Jul 26 54° 86° 43° (1971) 101° (1959) 0.06" NA
Jul 27 54° 86° 45° (1963) 104° (1951) 0.06" NA
Jul 28 54° 86° 45° (1964) 102° (1999) 0.06" NA
Jul 29 54° 87° 40° (1971) 100° (2000) 0.06" NA
Jul 30 54° 87° 44° (1971) 101° (2000) 0.06" NA
Jul 31 54° 87° 41° (1986) 101° (1952) 0.06" NA
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