Decker, Montana
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 33° -40° (1997) 70° (2005) 0.51" NA
February 12° 39° -38° (1936) 80° (1940) 0.38" NA
March 21° 48° -24° (1978) 80° (1978) 0.86" NA
April 30° 58° -14° (1936) 88° (1989) 1.56" NA
May 39° 67° 7° (1999) 96° (1980) 2.68" NA
June 48° 78° 28° (1998) 106° (1936) 2.49" NA
July 53° 87° 11° (1955) 109° (2002) 1.25" NA
August 51° 87° 29° (1920) 105° (2001) 0.84" NA
September 41° 75° 4° (1984) 104° (1954) 1.38" NA
October 30° 62° -18° (1991) 92° (1992) 1.3" NA
November 18° 45° -26° (1985) 80° (1999) 0.67" NA
December 36° -44° (1989) 78° (1939) 0.5" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
May 1 34° 63° 13° (2005) 85° (1987) 0.07" NA
May 2 35° 63° 13° (2005) 88° (1947) 0.07" NA
May 3 35° 63° 17° (1954) 87° (1985) 0.08" NA
May 4 35° 64° 19° (2002) 89° (1986) 0.08" NA
May 5 35° 64° 17° (2006) 88° (1934) 0.08" NA
May 6 36° 64° 7° (1999) 86° (1928) 0.08" NA
May 7 36° 65° 15° (1999) 92° (1934) 0.08" NA
May 8 36° 65° 19° (1929) 92° (1934) 0.08" NA
May 9 37° 65° 17° (2002) 90° (1987) 0.08" NA
May 10 37° 66° 17° (1927) 86° (1987) 0.08" NA
May 11 37° 66° 23° (1968) 90° (1940) 0.09" NA
May 12 38° 66° 20° (1953) 92° (1941) 0.09" NA
May 13 38° 67° 22° (1983) 96° (1960) 0.09" NA
May 14 38° 67° 20° (2004) 93° (1936) 0.09" NA
May 15 39° 67° 25° (1983) 93° (1936) 0.09" NA
May 16 39° 67° 20° (1974) 95° (1987) 0.09" NA
May 17 39° 68° 23° (1983) 94° (1948) 0.09" NA
May 18 40° 68° 25° (1942) 93° (1964) 0.09" NA
May 19 40° 68° 25° (1968) 91° (1992) 0.09" NA
May 20 40° 69° 22° (1931) 94° (1992) 0.09" NA
May 21 40° 69° 23° (1931) 93° (1964) 0.09" NA
May 22 41° 69° 27° (1931) 89° (1980) 0.09" NA
May 23 41° 70° 26° (1974) 93° (1980) 0.09" NA
May 24 41° 70° 24° (2002) 96° (1980) 0.09" NA
May 25 42° 70° 27° (1989) 91° (1922) 0.09" NA
May 26 42° 71° 28° (1977) 95° (1934) 0.09" NA
May 27 42° 71° 24° (1977) 96° (1969) 0.09" NA
May 28 43° 71° 26° (1973) 96° (1934) 0.09" NA
May 29 43° 72° 27° (1947) 96° (1934) 0.09" NA
May 30 43° 72° 29° (1982) 91° (2003) 0.1" NA
May 31 44° 72° 24° (1982) 95° (1966) 0.09" NA
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