Sinai, South Dakota
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 26° -34° (1972) 66° (1981) 0.51" 6.7"
February 12° 32° -34° (1994) 68° (2000) 0.73" 5.7"
March 23° 43° -23° (1948) 85° (1968) 1.45" 6.2"
April 35° 59° 0° (1975) 95° (1980) 2.53" 4.2"
May 47° 71° 17° (1967) 99° (1967) 3.1" 0.2"
June 57° 79° 34° (1969) 104° (1988) 4.42" 0"
July 62° 84° 37° (1971) 107° (1976) 3.29" 0"
August 60° 81° 35° (1964) 105° (1973) 2.96" 0"
September 50° 73° 22° (1951) 103° (1976) 3.07" 0"
October 37° 60° 9° (1976) 92° (1980) 2.07" 1.3"
November 24° 42° -16° (1964) 80° (1978) 1.26" 8.3"
December 11° 28° -29° (1989) 64° (1998) 0.63" 6.2"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Apr 1 29° 51° 2° (1975) 85° (1963) 0.07" 0.2"
Apr 2 29° 52° 9° (1975) 82° (1981) 0.07" 0.2"
Apr 3 30° 53° 0° (1975) 74° (2005) 0.07" 0.1"
Apr 4 30° 53° 12° (1995) 80° (2005) 0.07" 0.2"
Apr 5 30° 54° 10° (1994) 86° (1991) 0.08" 0.2"
Apr 6 31° 54° 5° (1982) 87° (1991) 0.08" 0.1"
Apr 7 31° 55° 14° (1997) 80° (1991) 0.07" 0.2"
Apr 8 32° 56° 6° (1997) 83° (1988) 0.08" 0.2"
Apr 9 32° 56° 10° (1997) 90° (1977) 0.08" 0.1"
Apr 10 33° 57° 17° (1973) 86° (1977) 0.08" 0.2"
Apr 11 33° 57° 11° (1997) 86° (1968) 0.08" 0.2"
Apr 12 33° 58° 13° (1957) 79° (2006) 0.08" 0.1"
Apr 13 34° 58° 11° (1950) 89° (2006) 0.09" 0.2"
Apr 14 34° 59° 19° (1950) 88° (1954) 0.08" 0.2"
Apr 15 35° 59° 17° (1962) 89° (2002) 0.09" 0.2"
Apr 16 35° 60° 21° (1951) 90° (1964) 0.09" 0.1"
Apr 17 36° 60° 15° (1953) 90° (1985) 0.09" 0.2"
Apr 18 36° 61° 14° (1953) 93° (1985) 0.09" 0.2"
Apr 19 36° 61° 22° (1953) 88° (1987) 0.09" 0.1"
Apr 20 37° 62° 18° (1966) 93° (1980) 0.08" 0.2"
Apr 21 37° 62° 20° (1966) 95° (1980) 0.09" 0.1"
Apr 22 38° 63° 23° (1951) 89° (1990) 0.09" 0.1"
Apr 23 38° 63° 18° (1956) 85° (1990) 0.09" 0.1"
Apr 24 39° 64° 20° (1967) 87° (1962) 0.09" 0.1"
Apr 25 39° 64° 25° (1958) 94° (1962) 0.1" 0.1"
Apr 26 39° 65° 22° (1988) 86° (1987) 0.09" 0.1"
Apr 27 40° 65° 24° (1973) 92° (1981) 0.09" 0"
Apr 28 40° 65° 22° (1950) 92° (2004) 0.1" 0.1"
Apr 29 41° 66° 19° (1958) 86° (1965) 0.09" 0.1"
Apr 30 41° 66° 19° (1966) 92° (1992) 0.09" 0"
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