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
May 1 43° 66° 31° (1966) 89° (1987) 0.13" NA
May 2 44° 66° 28° (1967) 87° (1968) 0.13" NA
May 3 44° 67° 26° (1976) 85° (1968) 0.13" NA
May 4 45° 67° 33° (1957) 85° (1965) 0.14" NA
May 5 45° 67° 34° (1958) 87° (1962) 0.14" NA
May 6 46° 68° 25° (1992) 83° (1988) 0.14" NA
May 7 46° 68° 27° (1992) 85° (1962) 0.14" NA
May 8 47° 68° 31° (1980) 86° (1963) 0.14" NA
May 9 47° 69° 31° (1966) 88° (1963) 0.14" NA
May 10 47° 69° 31° (1966) 87° (1962) 0.14" NA
May 11 48° 69° 33° (1990) 85° (1958) 0.14" NA
May 12 48° 70° 36° (1971) 93° (1956) 0.14" NA
May 13 49° 70° 32° (1997) 92° (1956) 0.14" NA
May 14 49° 70° 32° (1973) 92° (1988) 0.14" NA
May 15 49° 71° 30° (1959) 86° (1991) 0.15" NA
May 16 50° 71° 32° (1956) 86° (1962) 0.15" NA
May 17 50° 71° 38° (1973) 88° (1962) 0.15" NA
May 18 50° 72° 39° (2002) 90° (1956) 0.15" NA
May 19 51° 72° 36° (1993) 86° (1962) 0.15" NA
May 20 51° 72° 38° (1968) 87° (1962) 0.15" NA
May 21 52° 73° 36° (2002) 87° (1962) 0.15" NA
May 22 52° 73° 32° (1963) 87° (1956) 0.15" NA
May 23 52° 73° 33° (1963) 88° (1967) 0.15" NA
May 24 53° 74° 39° (1979) 92° (1967) 0.15" NA
May 25 53° 74° 41° (2001) 93° (1967) 0.15" NA
May 26 53° 74° 38° (1961) 89° (1967) 0.15" NA
May 27 54° 75° 31° (1992) 86° (1967) 0.15" NA
May 28 54° 75° 32° (1992) 87° (1956) 0.15" NA
May 29 54° 75° 35° (1992) 88° (1980) 0.15" NA
May 30 54° 76° 38° (1992) 88° (1988) 0.15" NA
May 31 55° 76° 38° (1972) 90° (2000) 0.14" NA
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