Sinai, South Dakota
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 24° -34° (1972) 66° (1981) 0.5" 6"
February 11° 31° -34° (1994) 68° (2000) 0.69" 6.9"
March 22° 43° -23° (1948) 85° (1968) 1.59" 8.6"
April 35° 59° 0° (1975) 95° (1980) 2.31" 2.2"
May 47° 71° 17° (1967) 99° (1967) 3.22" 0"
June 57° 80° 34° (1969) 104° (1988) 3.95" 0"
July 61° 84° 37° (1971) 107° (1976) 3.21" 0"
August 59° 82° 35° (1964) 105° (1973) 3.11" 0"
September 49° 73° 22° (1951) 103° (1976) 2.58" 0"
October 37° 60° 9° (1976) 92° (1980) 1.76" 1"
November 22° 41° -16° (1964) 80° (1978) 1.32" 5.3"
December 28° -29° (1989) 64° (1998) 0.52" 6"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Oct 1 43° 68° 23° (1974) 90° (1951) 0.07" NA
Oct 2 43° 67° 20° (1974) 91° (1953) 0.07" NA
Oct 3 43° 67° 26° (1950) 85° (1976) 0.07" NA
Oct 4 42° 67° 23° (1950) 87° (1987) 0.07" NA
Oct 5 42° 66° 19° (1952) 90° (1963) 0.07" NA
Oct 6 41° 66° 24° (1991) 87° (1958) 0.06" NA
Oct 7 41° 65° 20° (1952) 92° (1980) 0.06" NA
Oct 8 41° 65° 17° (2000) 85° (1980) 0.06" NA
Oct 9 40° 65° 21° (1956) 91° (1980) 0.06" NA
Oct 10 40° 64° 17° (1970) 85° (1974) 0.06" NA
Oct 11 39° 64° 23° (1967) 83° (1956) 0.06" NA
Oct 12 39° 63° 23° (1959) 85° (1956) 0.06" NA
Oct 13 38° 63° 16° (1979) 87° (1958) 0.06" NA
Oct 14 38° 62° 23° (1986) 89° (1958) 0.06" NA
Oct 15 38° 61° 22° (1952) 89° (1958) 0.06" NA
Oct 16 37° 61° 19° (1976) 83° (1961) 0.06" NA
Oct 17 37° 60° 13° (1976) 81° (1953) 0.05" NA
Oct 18 36° 60° 18° (1989) 83° (2003) 0.05" NA
Oct 19 36° 59° 14° (1960) 85° (2003) 0.05" NA
Oct 20 35° 59° 20° (1960) 80° (1953) 0.05" NA
Oct 21 35° 58° 20° (1960) 78° (2003) 0.05" NA
Oct 22 34° 57° 17° (1976) 81° (1973) 0.05" NA
Oct 23 34° 57° 13° (1981) 80° (1963) 0.05" NA
Oct 24 33° 56° 18° (1955) 82° (1989) 0.05" NA
Oct 25 33° 55° 15° (1962) 79° (1955) 0.05" NA
Oct 26 32° 55° 19° (1953) 81° (1955) 0.05" NA
Oct 27 32° 54° 9° (1976) 79° (1955) 0.05" NA
Oct 28 31° 53° 13° (1967) 77° (2001) 0.05" NA
Oct 29 31° 52° 17° (1952) 75° (1950) 0.05" NA
Oct 30 30° 52° 10° (1991) 86° (1950) 0.05" NA
Oct 31 30° 51° 12° (2002) 76° (1950) 0.05" NA
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