Garrison, Iowa
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 11° 28° -29° (1974) 63° (2002) 1.09" 8.4"
February 17° 34° -30° (1996) 66° (2000) 1.19" 7.1"
March 28° 47° -34° (1962) 88° (1986) 2.09" 4.8"
April 39° 62° 4° (1982) 91° (1952) 3.54" 1.6"
May 49° 72° 22° (2005) 93° (1975) 4.68" 0"
June 59° 81° 36° (1993) 101° (1988) 5.16" 0"
July 63° 84° 44° (1981) 105° (1977) 4.39" 0"
August 61° 82° 36° (1950) 104° (1988) 4.26" 0"
September 52° 75° 23° (1984) 100° (1955) 3.53" 0"
October 41° 63° 10° (1952) 94° (1953) 2.87" 0.2"
November 29° 47° -10° (1977) 79° (1999) 2.35" 1.9"
December 16° 32° -27° (1985) 68° (1998) 1.55" 9.5"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 58° 80° 34° (1949) 98° (1953) 0.12" 0"
Sep 2 58° 80° 40° (1965) 99° (1953) 0.13" 0"
Sep 3 57° 79° 37° (1974) 95° (1960) 0.12" 0"
Sep 4 57° 79° 36° (1974) 96° (1954) 0.11" 0"
Sep 5 57° 79° 39° (1974) 94° (1960) 0.13" 0"
Sep 6 56° 79° 36° (1950) 94° (1960) 0.12" 0"
Sep 7 56° 78° 37° (1956) 97° (1985) 0.12" 0"
Sep 8 55° 78° 37° (1986) 95° (1971) 0.12" 0"
Sep 9 55° 78° 39° (1949) 100° (1955) 0.13" 0"
Sep 10 55° 78° 35° (1976) 93° (1978) 0.11" 0"
Sep 11 54° 77° 35° (1955) 95° (2000) 0.12" 0"
Sep 12 54° 77° 33° (1955) 94° (1952) 0.12" 0"
Sep 13 53° 77° 32° (1953) 88° (1952) 0.12" 0"
Sep 14 53° 76° 36° (1949) 90° (1994) 0.12" 0"
Sep 15 52° 76° 31° (2007) 95° (1955) 0.12" 0"
Sep 16 52° 76° 31° (1984) 93° (1955) 0.11" 0"
Sep 17 51° 75° 37° (1999) 93° (1955) 0.12" 0"
Sep 18 51° 75° 34° (1981) 94° (1955) 0.12" 0"
Sep 19 51° 74° 33° (1991) 98° (1948) 0.12" 0"
Sep 20 50° 74° 29° (1991) 89° (1970) 0.12" 0"
Sep 21 50° 74° 28° (1982) 90° (2005) 0.12" 0"
Sep 22 49° 73° 26° (1982) 84° (1968) 0.12" 0"
Sep 23 49° 73° 29° (1983) 85° (2007) 0.11" 0"
Sep 24 48° 72° 30° (1989) 89° (1984) 0.11" 0"
Sep 25 48° 72° 33° (2001) 87° (1956) 0.12" 0"
Sep 26 47° 72° 28° (1984) 87° (1986) 0.11" 0"
Sep 27 47° 71° 30° (1982) 89° (1954) 0.11" 0"
Sep 28 47° 71° 30° (1951) 100° (1953) 0.12" 0"
Sep 29 46° 70° 23° (1984) 96° (1953) 0.1" 0"
Sep 30 46° 70° 25° (1984) 92° (1952) 0.11" 0"
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