Hartley, South Dakota
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 29° -33° (1966) 69° (1987) 0.41" 6.1"
February 15° 36° -37° (1994) 73° (1992) 0.56" 8"
March 24° 46° -29° (1998) 83° (2007) 1.23" 11"
April 35° 60° 2° (1975) 96° (1992) 1.95" 6.4"
May 45° 71° 12° (1950) 103° (1992) 3.43" 0.5"
June 55° 81° 30° (1969) 113° (2002) 3.09" 0.1"
July 60° 88° 38° (1959) 116° (2006) 2.92" 0"
August 59° 88° 38° (1988) 110° (1988) 1.97" 0"
September 48° 77° 20° (1951) 107° (1960) 1.32" 0.1"
October 36° 63° -5° (1991) 98° (1963) 1.71" 2"
November 22° 44° -25° (1959) 85° (1999) 0.6" 6"
December 12° 32° -33° (1990) 70° (1998) 0.44" 8.3"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Apr 1 29° 53° 6° (1975) 81° (1976) 0.05" NA
Apr 2 30° 54° 2° (1975) 79° (1991) 0.05" NA
Apr 3 30° 54° 14° (1982) 79° (1969) 0.05" NA
Apr 4 30° 55° 8° (1968) 80° (1992) 0.05" NA
Apr 5 31° 55° 14° (1979) 82° (1991) 0.05" NA
Apr 6 31° 56° 14° (1979) 80° (1969) 0.05" NA
Apr 7 32° 56° 12° (1997) 86° (1970) 0.05" NA
Apr 8 32° 56° 4° (1997) 81° (2005) 0.05" NA
Apr 9 32° 57° 13° (1982) 88° (1977) 0.05" NA
Apr 10 33° 57° 13° (1973) 91° (1996) 0.06" NA
Apr 11 33° 58° 6° (1997) 86° (1968) 0.06" NA
Apr 12 33° 58° 8° (1957) 88° (2003) 0.06" NA
Apr 13 34° 59° 16° (1997) 87° (2003) 0.06" NA
Apr 14 34° 59° 13° (1986) 85° (1985) 0.06" NA
Apr 15 35° 60° 14° (1986) 86° (1971) 0.06" NA
Apr 16 35° 60° 13° (1961) 89° (1958) 0.06" NA
Apr 17 35° 60° 10° (1961) 87° (1985) 0.06" NA
Apr 18 36° 61° 17° (1953) 93° (1987) 0.07" NA
Apr 19 36° 61° 20° (1966) 90° (1961) 0.07" NA
Apr 20 36° 62° 4° (1966) 93° (1980) 0.07" NA
Apr 21 37° 62° 16° (1959) 96° (1980) 0.07" NA
Apr 22 37° 62° 19° (1967) 93° (1989) 0.07" NA
Apr 23 37° 63° 17° (1988) 85° (1990) 0.08" NA
Apr 24 38° 63° 20° (1972) 89° (1962) 0.08" NA
Apr 25 38° 64° 24° (1958) 90° (1962) 0.08" NA
Apr 26 39° 64° 15° (1950) 85° (1952) 0.08" NA
Apr 27 39° 64° 17° (1994) 91° (1952) 0.08" NA
Apr 28 39° 65° 17° (1961) 92° (2001) 0.09" NA
Apr 29 40° 65° 22° (1956) 86° (1985) 0.09" NA
Apr 30 40° 65° 9° (1950) 96° (1992) 0.09" NA
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