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
Dec 1 16° 36° -7° (1983) 70° (1998) 0.01" NA
Dec 2 16° 36° -21° (1985) 61° (2002) 0.01" NA
Dec 3 15° 36° -14° (1984) 69° (1948) 0.01" NA
Dec 4 15° 35° -9° (1984) 63° (1979) 0.01" NA
Dec 5 15° 35° -17° (1972) 60° (1979) 0.01" NA
Dec 6 14° 35° -25° (1972) 62° (1991) 0.01" NA
Dec 7 14° 34° -19° (1972) 56° (1990) 0.01" NA
Dec 8 14° 34° -26° (1972) 62° (1990) 0.01" NA
Dec 9 13° 34° -23° (1977) 69° (1957) 0.01" NA
Dec 10 13° 34° -20° (1972) 60° (1979) 0.01" NA
Dec 11 13° 33° -23° (1972) 53° (1968) 0.01" NA
Dec 12 12° 33° -17° (2000) 61° (2004) 0.01" NA
Dec 13 12° 33° -23° (1985) 65° (1988) 0.01" NA
Dec 14 12° 32° -21° (1958) 62° (1997) 0.02" NA
Dec 15 12° 32° -27° (1951) 61° (1962) 0.02" NA
Dec 16 11° 32° -28° (1951) 65° (1962) 0.02" NA
Dec 17 11° 32° -23° (1975) 63° (1998) 0.02" NA
Dec 18 11° 32° -24° (1955) 63° (1979) 0.02" NA
Dec 19 11° 31° -20° (1996) 54° (1966) 0.02" NA
Dec 20 10° 31° -19° (1951) 62° (1957) 0.02" NA
Dec 21 10° 31° -29° (1951) 52° (1950) 0.02" NA
Dec 22 10° 31° -31° (1989) 57° (1954) 0.02" NA
Dec 23 10° 31° -29° (1983) 57° (1950) 0.02" NA
Dec 24 10° 30° -25° (1983) 54° (1963) 0.02" NA
Dec 25 30° -22° (1983) 56° (1963) 0.02" NA
Dec 26 30° -30° (1996) 56° (1999) 0.02" NA
Dec 27 30° -11° (1967) 54° (1956) 0.01" NA
Dec 28 30° -16° (1968) 54° (1998) 0.01" NA
Dec 29 30° -22° (1990) 60° (1999) 0.01" NA
Dec 30 29° -33° (1990) 59° (1999) 0.01" NA
Dec 31 29° -29° (1967) 61° (1963) 0.01" NA
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