Winthrop, Iowa
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 26° -26° (1985) 61° (2002) 1.03" NA
February 16° 32° -30° (1996) 66° (2000) 1.15" NA
March 27° 45° -11° (2002) 86° (1986) 1.96" NA
April 38° 60° -1° (1982) 90° (2007) 3.26" NA
May 50° 72° 20° (2005) 93° (1991) 3.84" NA
June 60° 82° 36° (1993) 100° (1988) 5.09" NA
July 63° 85° 41° (1984) 102° (1988) 4.09" NA
August 61° 82° 36° (2004) 101° (1988) 4.89" NA
September 52° 75° 26° (1984) 96° (1999) 3.24" NA
October 41° 63° 15° (1997) 94° (1997) 2.47" NA
November 28° 45° -6° (1986) 79° (1999) 2.41" NA
December 15° 31° -29° (2000) 67° (1998) 1.33" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
May 1 44° 67° 26° (2005) 91° (2007) 0.11" NA
May 2 44° 67° 27° (2005) 81° (1992) 0.11" NA
May 3 45° 68° 20° (2005) 79° (1982) 0.11" NA
May 4 45° 68° 21° (2005) 83° (2000) 0.11" NA
May 5 46° 69° 32° (2004) 84° (2000) 0.11" NA
May 6 46° 69° 27° (1989) 82° (1988) 0.11" NA
May 7 46° 69° 29° (1989) 84° (1988) 0.11" NA
May 8 47° 70° 32° (1983) 83° (1993) 0.11" NA
May 9 47° 70° 34° (1983) 87° (1987) 0.11" NA
May 10 48° 70° 35° (1997) 89° (1987) 0.11" NA
May 11 48° 71° 34° (1990) 87° (1987) 0.12" NA
May 12 48° 71° 34° (1996) 86° (1991) 0.12" NA
May 13 49° 71° 32° (1996) 87° (1991) 0.12" NA
May 14 49° 72° 36° (2000) 88° (1998) 0.12" NA
May 15 49° 72° 33° (2004) 92° (2007) 0.12" NA
May 16 50° 73° 32° (1997) 86° (1992) 0.12" NA
May 17 50° 73° 39° (2007) 89° (1987) 0.12" NA
May 18 51° 73° 35° (2002) 91° (1998) 0.12" NA
May 19 51° 74° 32° (2002) 89° (1996) 0.12" NA
May 20 51° 74° 32° (2002) 87° (1987) 0.13" NA
May 21 52° 74° 33° (2002) 88° (1988) 0.13" NA
May 22 52° 75° 35° (2002) 88° (1994) 0.13" NA
May 23 53° 75° 39° (2003) 89° (1994) 0.13" NA
May 24 53° 75° 41° (2001) 81° (1985) 0.13" NA
May 25 53° 76° 38° (1988) 84° (1985) 0.14" NA
May 26 54° 76° 37° (1992) 89° (1985) 0.14" NA
May 27 54° 76° 35° (1992) 89° (1991) 0.14" NA
May 28 54° 77° 39° (1992) 93° (1991) 0.14" NA
May 29 55° 77° 37° (1984) 92° (1991) 0.15" NA
May 30 55° 77° 40° (1984) 90° (1988) 0.15" NA
May 31 55° 78° 45° (1983) 92° (1988) 0.15" NA
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