Fort Thompson, South Dakota
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 25° -36° (1982) 65° (1987) 0.41" NA
February 31° -40° (1994) 72° (2000) 0.5" NA
March 18° 43° -25° (1960) 85° (1988) 1.31" NA
April 31° 58° -1° (1975) 99° (1980) 1.98" NA
May 43° 70° 13° (1967) 103° (1969) 2.95" NA
June 53° 80° 29° (1964) 110° (1988) 2.95" NA
July 58° 87° 32° (1964) 111° (2006) 2.62" NA
August 56° 85° 31° (1986) 112° (1965) 2.07" NA
September 46° 75° 17° (1974) 107° (1983) 1.77" NA
October 32° 61° 2° (1991) 95° (1997) 1.75" NA
November 17° 41° -22° (1959) 82° (1999) 0.65" NA
December 28° -32° (1990) 70° (1998) 0.41" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jul 1 56° 84° 41° (1959) 100° (1974) 0.09" NA
Jul 2 57° 84° 39° (1968) 102° (1989) 0.09" NA
Jul 3 57° 85° 39° (1967) 101° (1961) 0.09" NA
Jul 4 57° 85° 40° (1967) 101° (1975) 0.09" NA
Jul 5 57° 85° 40° (1972) 107° (1989) 0.09" NA
Jul 6 57° 85° 42° (1960) 109° (1985) 0.09" NA
Jul 7 57° 86° 42° (2004) 107° (1985) 0.09" NA
Jul 8 58° 86° 48° (1996) 106° (1989) 0.09" NA
Jul 9 58° 86° 46° (1994) 111° (1976) 0.09" NA
Jul 10 58° 86° 48° (1978) 109° (1966) 0.09" NA
Jul 11 58° 86° 46° (1975) 106° (1973) 0.09" NA
Jul 12 58° 86° 43° (1975) 104° (1974) 0.09" NA
Jul 13 58° 87° 41° (1967) 105° (1974) 0.09" NA
Jul 14 58° 87° 40° (1967) 101° (1968) 0.09" NA
Jul 15 58° 87° 41° (1985) 101° (1975) 0.08" NA
Jul 16 58° 87° 43° (1976) 111° (2006) 0.08" NA
Jul 17 58° 87° 45° (1985) 107° (2006) 0.08" NA
Jul 18 59° 87° 45° (1984) 102° (2002) 0.08" NA
Jul 19 59° 87° 47° (1959) 105° (1976) 0.08" NA
Jul 20 59° 87° 45° (1970) 106° (1974) 0.08" NA
Jul 21 59° 87° 47° (1970) 106° (2002) 0.08" NA
Jul 22 59° 87° 43° (1985) 105° (1964) 0.08" NA
Jul 23 59° 88° 45° (1961) 102° (1986) 0.08" NA
Jul 24 59° 88° 50° (1991) 108° (2005) 0.08" NA
Jul 25 59° 88° 42° (2004) 106° (1976) 0.08" NA
Jul 26 59° 88° 42° (1962) 107° (2003) 0.08" NA
Jul 27 59° 88° 46° (1972) 101° (1985) 0.08" NA
Jul 28 59° 88° 42° (1971) 107° (1975) 0.08" NA
Jul 29 59° 88° 32° (1964) 108° (2006) 0.08" NA
Jul 30 59° 88° 37° (1971) 108° (2006) 0.08" NA
Jul 31 59° 87° 45° (1971) 107° (1988) 0.08" NA
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