Grand River, Iowa
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 11° 30° -24° (1982) 65° (2003) 0.8" 5.3"
February 16° 36° -25° (1996) 74° (1972) 1.02" 4.6"
March 26° 48° -18° (1962) 87° (1986) 2.33" 3.3"
April 37° 61° 8° (1982) 89° (1987) 3.34" 0.9"
May 50° 71° 25° (1992) 93° (1967) 4.47" 0"
June 59° 81° 36° (1989) 105° (1988) 4.33" 0"
July 65° 85° 43° (1971) 105° (1980) 4.61" 0"
August 63° 83° 41° (1992) 104° (1988) 3.75" 0"
September 53° 76° 25° (1989) 97° (2000) 4.28" 0"
October 42° 64° 14° (1972) 91° (1963) 2.93" 0.3"
November 29° 47° -15° (1964) 79° (1999) 2.28" 2"
December 17° 34° -30° (1989) 67° (1984) 1.13" 5.1"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 59° 80° 41° (1992) 96° (1984) 0.13" NA
Sep 2 58° 80° 46° (1974) 94° (2000) 0.14" NA
Sep 3 58° 80° 38° (1974) 97° (2000) 0.14" NA
Sep 4 57° 79° 41° (1974) 94° (1983) 0.14" NA
Sep 5 57° 79° 41° (1962) 96° (1990) 0.14" NA
Sep 6 57° 79° 38° (1956) 96° (1990) 0.14" NA
Sep 7 56° 78° 39° (1956) 97° (1990) 0.15" NA
Sep 8 56° 78° 42° (1986) 97° (1983) 0.15" NA
Sep 9 56° 78° 44° (1969) 96° (1983) 0.15" NA
Sep 10 55° 78° 39° (1976) 90° (2002) 0.15" NA
Sep 11 55° 77° 40° (1959) 91° (2000) 0.15" NA
Sep 12 55° 77° 38° (1975) 95° (2000) 0.15" NA
Sep 13 54° 77° 36° (1974) 93° (1991) 0.15" NA
Sep 14 54° 76° 39° (1974) 89° (1991) 0.15" NA
Sep 15 53° 76° 35° (1993) 88° (1994) 0.15" NA
Sep 16 53° 76° 35° (1993) 88° (1978) 0.15" NA
Sep 17 53° 75° 35° (1993) 92° (1983) 0.15" NA
Sep 18 52° 75° 37° (1973) 94° (1983) 0.15" NA
Sep 19 52° 75° 27° (1991) 90° (1984) 0.15" NA
Sep 20 52° 74° 28° (1991) 90° (1980) 0.15" NA
Sep 21 51° 74° 28° (1991) 91° (1956) 0.14" NA
Sep 22 51° 74° 29° (1995) 87° (1956) 0.14" NA
Sep 23 51° 74° 29° (1995) 84° (1976) 0.14" NA
Sep 24 50° 73° 25° (1989) 90° (1984) 0.14" NA
Sep 25 50° 73° 27° (1989) 88° (1956) 0.14" NA
Sep 26 50° 73° 29° (1984) 90° (1990) 0.14" NA
Sep 27 49° 72° 30° (1989) 90° (1956) 0.13" NA
Sep 28 49° 72° 30° (1989) 90° (1956) 0.13" NA
Sep 29 48° 71° 26° (1984) 89° (1981) 0.13" NA
Sep 30 48° 71° 29° (1992) 90° (2002) 0.12" NA
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