Boulder, Montana
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 10° 34° -38° (1957) 58° (2005) 0.4" NA
February 14° 40° -39° (1989) 65° (1995) 0.3" NA
March 20° 47° -28° (1955) 72° (1986) 0.52" NA
April 26° 56° -6° (1997) 83° (1987) 0.76" NA
May 34° 65° 9° (1967) 89° (1986) 1.99" NA
June 42° 74° 22° (1954) 96° (1988) 1.94" NA
July 47° 82° 30° (1949) 101° (2002) 1.51" NA
August 46° 82° 19° (1992) 100° (1961) 1.43" NA
September 36° 71° 8° (1965) 94° (1950) 1.06" NA
October 27° 60° -14° (1991) 87° (1992) 0.61" NA
November 18° 42° -34° (1959) 71° (1999) 0.56" NA
December 11° 35° -42° (1990) 62° (1980) 0.43" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
May 1 30° 60° 13° (1954) 78° (1985) 0.05" NA
May 2 31° 61° 9° (1967) 79° (1985) 0.05" NA
May 3 31° 61° 19° (1965) 81° (1966) 0.05" NA
May 4 31° 61° 18° (1996) 83° (1966) 0.05" NA
May 5 31° 61° 18° (1996) 84° (1966) 0.05" NA
May 6 32° 62° 19° (1996) 84° (1966) 0.06" NA
May 7 32° 62° 21° (1966) 84° (1987) 0.06" NA
May 8 32° 62° 22° (1997) 83° (1987) 0.06" NA
May 9 32° 63° 20° (1990) 82° (1987) 0.06" NA
May 10 33° 63° 21° (1972) 80° (1949) 0.06" NA
May 11 33° 63° 22° (1973) 84° (1960) 0.06" NA
May 12 33° 63° 20° (1985) 84° (1960) 0.06" NA
May 13 34° 64° 19° (1983) 82° (1960) 0.06" NA
May 14 34° 64° 19° (2004) 81° (1976) 0.07" NA
May 15 34° 64° 22° (2004) 82° (1987) 0.07" NA
May 16 34° 65° 23° (1974) 86° (1988) 0.07" NA
May 17 35° 65° 25° (1986) 85° (1988) 0.07" NA
May 18 35° 65° 21° (1965) 86° (1954) 0.07" NA
May 19 35° 65° 21° (1997) 89° (1954) 0.07" NA
May 20 35° 66° 21° (2003) 85° (1954) 0.07" NA
May 21 36° 66° 23° (1989) 84° (1958) 0.07" NA
May 22 36° 66° 28° (1959) 89° (1950) 0.07" NA
May 23 36° 67° 22° (1966) 84° (1988) 0.07" NA
May 24 36° 67° 24° (1989) 84° (1988) 0.07" NA
May 25 37° 67° 22° (1950) 85° (2003) 0.07" NA
May 26 37° 68° 23° (1975) 85° (1966) 0.07" NA
May 27 37° 68° 24° (1973) 88° (1986) 0.07" NA
May 28 37° 68° 22° (1955) 89° (1986) 0.07" NA
May 29 38° 68° 20° (1954) 87° (1986) 0.07" NA
May 30 38° 69° 26° (1977) 89° (1984) 0.07" NA
May 31 38° 69° 25° (1982) 89° (1986) 0.07" NA
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