Lone Tree, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 13° 30° -25° (1985) 70° (1989) 1.35" NA
February 19° 37° -18° (1979) 71° (1976) 1.48" NA
March 29° 49° -7° (1978) 85° (1986) 2.59" NA
April 39° 63° 9° (1982) 90° (1987) 3.66" NA
May 49° 74° 25° (1966) 93° (1975) 3.96" NA
June 58° 83° 35° (1972) 100° (1988) 4.79" NA
July 62° 86° 44° (1971) 103° (1983) 3.8" NA
August 60° 84° 40° (1986) 104° (1988) 4" NA
September 52° 78° 26° (1974) 98° (1971) 3.49" NA
October 41° 65° 15° (1988) 90° (1971) 2.86" NA
November 31° 49° -4° (1977) 81° (1968) 2.7" NA
December 19° 36° -24° (1989) 70° (1970) 2.12" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
May 1 44° 69° 29° (1978) 86° (1965) 0.12" NA
May 2 44° 69° 28° (1966) 84° (1965) 0.12" NA
May 3 45° 70° 29° (1967) 88° (1968) 0.12" NA
May 4 45° 70° 31° (1971) 87° (1969) 0.12" NA
May 5 45° 71° 35° (1967) 89° (1980) 0.12" NA
May 6 46° 71° 30° (1989) 86° (1966) 0.12" NA
May 7 46° 71° 26° (1989) 89° (1965) 0.12" NA
May 8 46° 72° 28° (1983) 87° (1979) 0.12" NA
May 9 46° 72° 30° (1966) 87° (1979) 0.12" NA
May 10 47° 72° 25° (1966) 89° (1987) 0.12" NA
May 11 47° 73° 35° (1969) 91° (1987) 0.12" NA
May 12 47° 73° 31° (1981) 87° (1987) 0.12" NA
May 13 48° 73° 31° (1971) 86° (1982) 0.12" NA
May 14 48° 74° 37° (1989) 88° (1982) 0.12" NA
May 15 48° 74° 35° (1973) 87° (1982) 0.12" NA
May 16 49° 75° 33° (1984) 89° (1977) 0.12" NA
May 17 49° 75° 34° (1983) 91° (1987) 0.13" NA
May 18 49° 75° 37° (1976) 93° (1964) 0.13" NA
May 19 50° 76° 38° (1988) 93° (1975) 0.13" NA
May 20 50° 76° 35° (1981) 91° (1972) 0.13" NA
May 21 50° 76° 36° (1967) 91° (1972) 0.13" NA
May 22 51° 77° 36° (1979) 93° (1964) 0.13" NA
May 23 51° 77° 36° (1969) 93° (1975) 0.13" NA
May 24 51° 77° 39° (1969) 90° (1972) 0.13" NA
May 25 52° 77° 33° (1988) 93° (1967) 0.14" NA
May 26 52° 78° 36° (1979) 93° (1967) 0.14" NA
May 27 53° 78° 35° (1971) 92° (1987) 0.14" NA
May 28 53° 78° 35° (1971) 89° (1977) 0.14" NA
May 29 53° 79° 32° (1965) 90° (1969) 0.14" NA
May 30 54° 79° 36° (1990) 91° (1969) 0.15" NA
May 31 54° 79° 40° (1966) 88° (1986) 0.15" NA
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