Union, Iowa
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 25° -27° (1974) 66° (2002) 0.9" 7.6"
February 14° 31° -29° (1996) 66° (1981) 1.04" 7.1"
March 25° 43° -27° (1962) 87° (1986) 2.13" 4.1"
April 37° 58° 6° (1982) 98° (1980) 3.79" 1.6"
May 49° 70° 26° (2005) 94° (1967) 4.91" 0"
June 59° 79° 40° (1993) 104° (1988) 5.27" 0"
July 63° 83° 36° (2005) 103° (1989) 4.45" 0"
August 61° 81° 39° (1958) 108° (1988) 4.37" 0"
September 51° 74° 28° (1984) 98° (2000) 3.39" 0"
October 39° 61° 17° (1997) 94° (1997) 2.55" 0.2"
November 27° 44° -13° (1977) 81° (1968) 2.08" 2.3"
December 14° 29° -23° (1983) 66° (2001) 1.38" 9.3"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 57° 79° 42° (1967) 96° (2000) 0.13" 0"
Sep 2 57° 79° 43° (1967) 98° (1984) 0.12" 0"
Sep 3 57° 79° 37° (1974) 95° (2000) 0.12" 0"
Sep 4 56° 78° 37° (1974) 95° (2000) 0.12" 0"
Sep 5 56° 78° 35° (1962) 93° (1990) 0.12" 0"
Sep 6 56° 78° 36° (1962) 94° (1990) 0.12" 0"
Sep 7 55° 77° 39° (1986) 95° (1985) 0.11" 0"
Sep 8 55° 77° 39° (1986) 97° (1978) 0.12" 0"
Sep 9 54° 77° 41° (1986) 93° (1978) 0.12" 0"
Sep 10 54° 77° 38° (1959) 95° (1983) 0.11" 0"
Sep 11 53° 76° 34° (1959) 92° (2000) 0.12" 0"
Sep 12 53° 76° 36° (1959) 98° (2000) 0.12" 0"
Sep 13 52° 76° 36° (1963) 96° (1998) 0.12" 0"
Sep 14 52° 75° 36° (1996) 92° (2000) 0.11" 0"
Sep 15 51° 75° 33° (2007) 90° (1994) 0.11" 0"
Sep 16 51° 74° 34° (2007) 90° (1994) 0.12" 0"
Sep 17 51° 74° 38° (1980) 88° (1972) 0.11" 0"
Sep 18 50° 74° 34° (1959) 95° (1988) 0.11" 0"
Sep 19 50° 73° 33° (1991) 89° (1985) 0.12" 0"
Sep 20 49° 73° 32° (1962) 93° (1984) 0.12" 0"
Sep 21 49° 72° 31° (1991) 89° (2005) 0.12" 0"
Sep 22 48° 72° 28° (1974) 93° (2005) 0.11" 0"
Sep 23 48° 71° 29° (1983) 85° (1968) 0.11" 0"
Sep 24 47° 71° 29° (1989) 88° (2007) 0.1" 0"
Sep 25 47° 71° 31° (1989) 88° (1984) 0.11" 0"
Sep 26 46° 70° 30° (1984) 86° (1990) 0.1" 0"
Sep 27 46° 70° 29° (1984) 88° (1998) 0.1" 0"
Sep 28 45° 69° 29° (1961) 85° (1983) 0.1" 0"
Sep 29 45° 69° 28° (1984) 86° (1971) 0.09" 0"
Sep 30 45° 68° 29° (1984) 88° (2002) 0.1" 0"
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