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
Sep 1 50° 83° 34° (1949) 99° (1983) 0.04" NA
Sep 2 49° 83° 32° (1952) 103° (1960) 0.04" NA
Sep 3 49° 83° 32° (1959) 99° (1971) 0.04" NA
Sep 4 49° 82° 29° (1962) 105° (1960) 0.04" NA
Sep 5 48° 82° 32° (1962) 106° (1978) 0.04" NA
Sep 6 48° 81° 28° (1956) 107° (1978) 0.04" NA
Sep 7 47° 81° 34° (1956) 106° (1978) 0.04" NA
Sep 8 47° 80° 32° (1992) 104° (1959) 0.04" NA
Sep 9 46° 80° 34° (1960) 100° (1979) 0.04" NA
Sep 10 46° 80° 26° (1962) 100° (1952) 0.04" NA
Sep 11 45° 79° 31° (1955) 96° (1998) 0.04" NA
Sep 12 45° 79° 27° (1989) 101° (1981) 0.04" NA
Sep 13 45° 78° 29° (1949) 97° (1959) 0.04" NA
Sep 14 44° 78° 25° (1993) 100° (1948) 0.04" NA
Sep 15 44° 78° 30° (1961) 102° (1948) 0.04" NA
Sep 16 43° 77° 30° (1965) 95° (1979) 0.04" NA
Sep 17 43° 77° 30° (1965) 93° (2000) 0.04" NA
Sep 18 43° 77° 25° (1991) 95° (1998) 0.04" NA
Sep 19 42° 76° 22° (1991) 94° (1970) 0.04" NA
Sep 20 42° 76° 27° (1982) 95° (1960) 0.04" NA
Sep 21 42° 75° 22° (1995) 86° (1969) 0.05" NA
Sep 22 41° 75° 18° (1995) 94° (2007) 0.05" NA
Sep 23 41° 75° 26° (1983) 95° (1958) 0.05" NA
Sep 24 41° 74° 23° (1965) 94° (1992) 0.05" NA
Sep 25 40° 74° 26° (2000) 89° (1974) 0.05" NA
Sep 26 40° 74° 22° (1972) 95° (1974) 0.05" NA
Sep 27 40° 73° 22° (1964) 95° (1952) 0.05" NA
Sep 28 39° 73° 22° (1951) 93° (1957) 0.05" NA
Sep 29 39° 73° 22° (1984) 88° (1980) 0.05" NA
Sep 30 39° 72° 22° (1958) 94° (1980) 0.05" NA
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