Monticello, Iowa
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 27° -30° (1999) 66° (1989) 1.17" NA
February 12° 33° -37° (1996) 67° (2000) 1.19" NA
March 24° 45° -22° (1962) 87° (1986) 2.36" NA
April 36° 60° 0° (1982) 90° (1987) 3.51" NA
May 47° 71° 22° (2005) 93° (1985) 4.13" NA
June 57° 80° 33° (1993) 100° (1988) 4.36" NA
July 61° 84° 39° (1972) 102° (1988) 4.19" NA
August 59° 82° 37° (1986) 102° (1987) 4.5" NA
September 49° 74° 23° (1984) 99° (1955) 3.36" NA
October 38° 62° 10° (1952) 93° (1997) 2.54" NA
November 25° 45° -14° (1977) 78° (2000) 2.54" NA
December 14° 32° -27° (2000) 71° (1998) 1.48" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jun 1 52° 76° 33° (1993) 92° (1988) 0.14" NA
Jun 2 53° 77° 39° (1956) 91° (1988) 0.14" NA
Jun 3 53° 77° 38° (1964) 93° (1972) 0.14" NA
Jun 4 53° 77° 39° (1964) 91° (1977) 0.14" NA
Jun 5 54° 78° 36° (1982) 94° (1977) 0.14" NA
Jun 6 54° 78° 41° (1983) 92° (1963) 0.15" NA
Jun 7 54° 78° 38° (1983) 96° (1963) 0.15" NA
Jun 8 55° 79° 40° (1983) 96° (1985) 0.15" NA
Jun 9 55° 79° 37° (1977) 96° (1985) 0.15" NA
Jun 10 55° 79° 38° (1966) 92° (1968) 0.15" NA
Jun 11 56° 80° 35° (1972) 94° (2001) 0.15" NA
Jun 12 56° 80° 40° (1974) 94° (2001) 0.15" NA
Jun 13 56° 80° 40° (1985) 96° (1987) 0.15" NA
Jun 14 56° 80° 43° (1985) 97° (1987) 0.15" NA
Jun 15 57° 80° 42° (1999) 95° (1987) 0.15" NA
Jun 16 57° 81° 39° (1961) 92° (1987) 0.15" NA
Jun 17 57° 81° 41° (1961) 94° (1987) 0.15" NA
Jun 18 57° 81° 43° (1965) 94° (1953) 0.15" NA
Jun 19 58° 81° 43° (1982) 96° (1953) 0.15" NA
Jun 20 58° 82° 40° (1985) 100° (1988) 0.15" NA
Jun 21 58° 82° 38° (1992) 100° (1988) 0.15" NA
Jun 22 58° 82° 42° (1963) 98° (1988) 0.14" NA
Jun 23 58° 82° 45° (1982) 98° (1988) 0.14" NA
Jun 24 59° 82° 42° (1972) 95° (1983) 0.14" NA
Jun 25 59° 82° 41° (2004) 97° (1954) 0.14" NA
Jun 26 59° 83° 41° (2004) 95° (1998) 0.14" NA
Jun 27 59° 83° 40° (1992) 95° (1998) 0.14" NA
Jun 28 59° 83° 43° (1968) 94° (1998) 0.14" NA
Jun 29 60° 83° 46° (1951) 95° (1954) 0.14" NA
Jun 30 60° 83° 43° (1988) 97° (1963) 0.14" NA
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