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
Mar 1 17° 42° -19° (1960) 68° (1992) 0.02" NA
Mar 2 18° 42° -21° (1960) 65° (1992) 0.02" NA
Mar 3 18° 42° -31° (1960) 65° (1968) 0.02" NA
Mar 4 18° 43° -33° (1989) 74° (1987) 0.02" NA
Mar 5 19° 43° -20° (1951) 76° (1987) 0.02" NA
Mar 6 19° 43° -26° (1996) 69° (1987) 0.02" NA
Mar 7 19° 43° -24° (1951) 62° (1987) 0.02" NA
Mar 8 19° 44° -28° (1951) 65° (1990) 0.02" NA
Mar 9 20° 44° -21° (2002) 69° (2004) 0.02" NA
Mar 10 20° 44° -19° (1951) 74° (1983) 0.02" NA
Mar 11 20° 45° -20° (1951) 70° (1995) 0.02" NA
Mar 12 21° 45° -20° (1950) 67° (1992) 0.02" NA
Mar 13 21° 45° -10° (1950) 67° (1999) 0.03" NA
Mar 14 21° 46° -20° (1967) 72° (1999) 0.03" NA
Mar 15 22° 46° -15° (1949) 73° (1995) 0.03" NA
Mar 16 22° 46° -6° (1993) 71° (1994) 0.03" NA
Mar 17 22° 47° -16° (1965) 66° (1959) 0.03" NA
Mar 18 23° 47° -16° (1965) 72° (2004) 0.03" NA
Mar 19 23° 47° -9° (1965) 73° (1997) 0.03" NA
Mar 20 23° 48° -15° (1965) 72° (1997) 0.03" NA
Mar 21 23° 48° -20° (2002) 70° (1986) 0.03" NA
Mar 22 24° 48° -10° (2002) 72° (1963) 0.03" NA
Mar 23 24° 49° -11° (1965) 77° (1993) 0.03" NA
Mar 24 24° 49° -20° (1964) 72° (1993) 0.03" NA
Mar 25 25° 50° -18° (1965) 78° (1999) 0.03" NA
Mar 26 25° 50° -9° (1965) 75° (1960) 0.03" NA
Mar 27 25° 50° 0° (1965) 69° (1966) 0.03" NA
Mar 28 26° 51° -12° (1965) 74° (1986) 0.03" NA
Mar 29 26° 51° -11° (1987) 72° (1978) 0.03" NA
Mar 30 26° 51° -4° (1954) 81° (2004) 0.03" NA
Mar 31 26° 52° 1° (1954) 78° (2004) 0.03" NA
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