Cheyenne River Reservation, South Dakota
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 26° -40° (1966) 67° (1981) 0.32" 4.1"
February 11° 32° -32° (1996) 73° (1982) 0.47" 5.7"
March 21° 42° -30° (1980) 85° (1967) 1.08" 6.9"
April 33° 57° 1° (1997) 97° (1980) 1.64" 4.3"
May 44° 69° 18° (1967) 104° (1969) 3.03" 0.3"
June 54° 79° 30° (1969) 111° (2002) 2.98" 0"
July 59° 87° 35° (1971) 114° (2006) 2.58" 0"
August 57° 86° 35° (1977) 111° (1988) 1.52" 0"
September 46° 75° 13° (1984) 106° (1983) 1.29" 0"
October 33° 61° -5° (1991) 97° (1963) 1.6" 0.7"
November 19° 41° -18° (1985) 83° (1999) 0.58" 4.4"
December 29° -33° (1967) 72° (1965) 0.36" 5.2"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Dec 1 12° 34° -14° (1975) 66° (1969) 0.01" NA
Dec 2 12° 33° -22° (1985) 69° (1998) 0.01" NA
Dec 3 12° 33° -19° (1985) 63° (1988) 0.01" NA
Dec 4 11° 32° -10° (1972) 72° (1965) 0.01" NA
Dec 5 11° 32° -16° (1972) 64° (1979) 0.01" NA
Dec 6 11° 32° -30° (1972) 63° (1988) 0.01" NA
Dec 7 11° 31° -17° (1972) 61° (1991) 0.01" NA
Dec 8 10° 31° -23° (1972) 54° (1979) 0.01" NA
Dec 9 10° 31° -21° (1977) 60° (1979) 0.01" NA
Dec 10 10° 31° -28° (1972) 62° (1979) 0.01" NA
Dec 11 30° -26° (1972) 59° (1987) 0.01" NA
Dec 12 30° -16° (2000) 59° (2004) 0.01" NA
Dec 13 30° -19° (1985) 53° (2002) 0.02" NA
Dec 14 29° -23° (1963) 64° (1988) 0.02" NA
Dec 15 29° -25° (1963) 64° (1998) 0.02" NA
Dec 16 29° -22° (1964) 58° (1980) 0.02" NA
Dec 17 29° -24° (1975) 57° (1976) 0.02" NA
Dec 18 28° -29° (1963) 64° (1979) 0.01" NA
Dec 19 28° -17° (1996) 57° (1988) 0.01" NA
Dec 20 28° -20° (1990) 55° (1966) 0.01" NA
Dec 21 28° -30° (1989) 51° (2003) 0.01" NA
Dec 22 27° -31° (1989) 48° (1972) 0.01" NA
Dec 23 27° -26° (1989) 53° (1986) 0.01" NA
Dec 24 27° -23° (1983) 50° (1963) 0.01" NA
Dec 25 27° -23° (1983) 56° (1963) 0.01" NA
Dec 26 26° -24° (1996) 54° (1999) 0.01" NA
Dec 27 26° -22° (1996) 57° (1980) 0.01" NA
Dec 28 26° -12° (1968) 55° (1980) 0.01" NA
Dec 29 26° -23° (1990) 59° (1999) 0.01" NA
Dec 30 26° -31° (1990) 57° (1999) 0.01" NA
Dec 31 26° -33° (1967) 60° (1963) 0.01" NA
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