Mason, South Dakota
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 11° 36° -35° (1950) 72° (2005) 0.46" NA
February 15° 42° -32° (1989) 73° (2005) 0.54" NA
March 22° 49° -30° (1960) 82° (1978) 1.06" NA
April 32° 61° -1° (1975) 93° (1980) 1.97" NA
May 43° 71° 15° (1954) 97° (1980) 2.99" NA
June 52° 81° 29° (1951) 106° (1970) 3.1" NA
July 57° 89° 37° (1950) 110° (1981) 2.05" NA
August 55° 88° 36° (1993) 108° (1975) 1.39" NA
September 44° 78° 18° (1995) 107° (1978) 1.3" NA
October 33° 65° -12° (1991) 94° (1963) 1.74" NA
November 21° 47° -26° (1959) 83° (1999) 0.71" NA
December 12° 38° -44° (1989) 74° (1979) 0.62" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Dec 1 16° 41° -10° (1983) 71° (1969) 0.02" NA
Dec 2 15° 41° -23° (1980) 67° (1959) 0.02" NA
Dec 3 15° 41° -9° (1978) 64° (1948) 0.02" NA
Dec 4 15° 40° -10° (1984) 66° (1975) 0.02" NA
Dec 5 15° 40° -27° (1972) 62° (1987) 0.02" NA
Dec 6 14° 40° -23° (1972) 61° (1963) 0.02" NA
Dec 7 14° 40° -18° (1972) 62° (1970) 0.02" NA
Dec 8 14° 39° -29° (1972) 61° (1990) 0.02" NA
Dec 9 14° 39° -24° (1977) 68° (1957) 0.02" NA
Dec 10 13° 39° -20° (1972) 65° (1990) 0.02" NA
Dec 11 13° 39° -22° (1972) 63° (2004) 0.02" NA
Dec 12 13° 39° -16° (2000) 61° (2004) 0.02" NA
Dec 13 13° 39° -12° (1972) 64° (1988) 0.02" NA
Dec 14 12° 38° -20° (1963) 69° (1997) 0.02" NA
Dec 15 12° 38° -20° (1963) 65° (1952) 0.02" NA
Dec 16 12° 38° -27° (1979) 67° (1980) 0.02" NA
Dec 17 12° 38° -23° (1964) 69° (1976) 0.02" NA
Dec 18 12° 38° -26° (1983) 74° (1979) 0.02" NA
Dec 19 12° 38° -19° (1970) 64° (1979) 0.02" NA
Dec 20 11° 37° -22° (1990) 64° (1979) 0.02" NA
Dec 21 11° 37° -26° (1983) 58° (1954) 0.02" NA
Dec 22 11° 37° -44° (1989) 60° (1972) 0.02" NA
Dec 23 11° 37° -31° (1983) 62° (1955) 0.02" NA
Dec 24 11° 37° -32° (1983) 60° (1955) 0.02" NA
Dec 25 11° 37° -31° (1983) 60° (1994) 0.02" NA
Dec 26 11° 37° -26° (1996) 58° (1972) 0.02" NA
Dec 27 11° 36° -14° (1951) 60° (1980) 0.02" NA
Dec 28 10° 36° -18° (1968) 60° (1999) 0.02" NA
Dec 29 10° 36° -24° (1990) 62° (1965) 0.02" NA
Dec 30 10° 36° -36° (1990) 58° (1965) 0.02" NA
Dec 31 10° 36° -24° (1967) 58° (1997) 0.02" NA
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