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
Jun 1 53° 76° 35° (1956) 88° (1981) 0.13" NA
Jun 2 53° 76° 35° (1951) 92° (2006) 0.13" NA
Jun 3 54° 77° 39° (1951) 97° (1968) 0.13" NA
Jun 4 54° 77° 37° (1951) 95° (1968) 0.13" NA
Jun 5 54° 77° 42° (2000) 94° (1977) 0.13" NA
Jun 6 54° 78° 39° (1953) 96° (1959) 0.13" NA
Jun 7 55° 78° 40° (1998) 95° (1981) 0.13" NA
Jun 8 55° 78° 38° (1980) 99° (2000) 0.13" NA
Jun 9 55° 78° 40° (1950) 93° (1956) 0.13" NA
Jun 10 56° 79° 42° (1955) 96° (1956) 0.13" NA
Jun 11 56° 79° 39° (1958) 96° (1976) 0.14" NA
Jun 12 56° 79° 41° (1969) 97° (1956) 0.14" NA
Jun 13 56° 79° 36° (1969) 99° (1956) 0.14" NA
Jun 14 57° 79° 34° (1969) 95° (1979) 0.14" NA
Jun 15 57° 80° 39° (1968) 97° (1959) 0.14" NA
Jun 16 57° 80° 38° (1974) 99° (1959) 0.14" NA
Jun 17 57° 80° 41° (1974) 93° (1995) 0.14" NA
Jun 18 57° 80° 40° (1976) 98° (1953) 0.14" NA
Jun 19 58° 81° 39° (1948) 100° (1988) 0.13" NA
Jun 20 58° 81° 38° (1969) 100° (1968) 0.13" NA
Jun 21 58° 81° 41° (1972) 104° (1988) 0.13" NA
Jun 22 58° 81° 43° (1982) 100° (1988) 0.13" NA
Jun 23 58° 81° 46° (1955) 94° (1981) 0.13" NA
Jun 24 59° 81° 43° (1957) 104° (1988) 0.13" NA
Jun 25 59° 82° 38° (1958) 98° (1988) 0.13" NA
Jun 26 59° 82° 46° (1958) 96° (1971) 0.13" NA
Jun 27 59° 82° 46° (1976) 97° (1971) 0.13" NA
Jun 28 59° 82° 41° (1951) 101° (1988) 0.12" NA
Jun 29 60° 82° 43° (1973) 98° (2002) 0.12" NA
Jun 30 60° 82° 46° (1948) 96° (1958) 0.12" NA
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