Dorchester, Iowa
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 22° -37° (1963) 57° (1996) 0.98" NA
February 10° 29° -35° (1996) 58° (2000) 0.82" NA
March 22° 41° -32° (1962) 82° (1986) 1.95" NA
April 34° 56° 2° (1982) 93° (1980) 3.67" NA
May 46° 68° 19° (1966) 90° (2007) 3.83" NA
June 56° 78° 35° (1964) 97° (1988) 4.57" NA
July 60° 82° 42° (1965) 101° (1995) 4.71" NA
August 58° 79° 35° (1964) 102° (1988) 4.85" NA
September 48° 71° 24° (1974) 92° (1960) 3.52" NA
October 37° 58° 13° (1988) 91° (1997) 2.44" NA
November 23° 41° -16° (1977) 75° (1978) 2.38" NA
December 10° 27° -28° (1983) 62° (1998) 1.27" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
May 1 40° 62° 20° (1966) 82° (1968) 0.13" NA
May 2 41° 63° 24° (1997) 90° (1959) 0.12" NA
May 3 41° 63° 21° (1967) 82° (1959) 0.12" NA
May 4 41° 64° 25° (1966) 90° (1980) 0.12" NA
May 5 42° 64° 28° (1967) 84° (2000) 0.12" NA
May 6 42° 64° 24° (1989) 84° (2000) 0.12" NA
May 7 43° 65° 23° (1989) 82° (1970) 0.12" NA
May 8 43° 65° 29° (1983) 84° (2000) 0.12" NA
May 9 43° 65° 19° (1966) 82° (1987) 0.12" NA
May 10 44° 66° 19° (1966) 88° (1987) 0.12" NA
May 11 44° 66° 30° (1960) 86° (1987) 0.12" NA
May 12 44° 67° 30° (1960) 82° (1991) 0.12" NA
May 13 45° 67° 29° (1997) 85° (1977) 0.12" NA
May 14 45° 67° 27° (1966) 85° (1977) 0.12" NA
May 15 46° 68° 32° (1983) 90° (2007) 0.12" NA
May 16 46° 68° 33° (1961) 89° (2001) 0.12" NA
May 17 46° 68° 34° (1997) 84° (1972) 0.12" NA
May 18 47° 69° 33° (2002) 89° (1987) 0.12" NA
May 19 47° 69° 34° (2002) 89° (1998) 0.12" NA
May 20 47° 70° 28° (1967) 89° (1998) 0.12" NA
May 21 48° 70° 30° (1978) 89° (1970) 0.12" NA
May 22 48° 70° 29° (1967) 90° (1964) 0.12" NA
May 23 49° 71° 29° (1963) 86° (1975) 0.13" NA
May 24 49° 71° 35° (1963) 85° (1972) 0.13" NA
May 25 49° 71° 37° (1974) 85° (1977) 0.13" NA
May 26 50° 72° 28° (1961) 88° (1967) 0.13" NA
May 27 50° 72° 34° (1971) 87° (1969) 0.13" NA
May 28 50° 72° 30° (1965) 88° (1969) 0.13" NA
May 29 51° 73° 27° (1965) 90° (1998) 0.13" NA
May 30 51° 73° 31° (1965) 90° (2006) 0.13" NA
May 31 51° 73° 36° (1966) 89° (1988) 0.14" NA
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