Savanna, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 11° 30° -31° (1910) 61° (2002) 1.48" 9.6"
February 16° 36° -30° (1996) 70° (2000) 1.77" 6.2"
March 26° 47° -16° (1962) 85° (1986) 2.61" 3.5"
April 37° 61° -2° (1982) 92° (1930) 3.7" 0.7"
May 47° 72° 20° (2005) 104° (1934) 4.42" 0"
June 57° 81° 31° (1988) 104° (1934) 4.98" 0"
July 61° 85° 35° (1904) 108° (1936) 4.52" 0"
August 59° 83° 32° (1986) 103° (1936) 4.5" 0"
September 49° 76° 23° (1983) 99° (1939) 3.46" 0"
October 38° 63° 4° (1925) 91° (1997) 3.14" 0.1"
November 29° 48° -15° (1976) 79° (2000) 2.9" 1.2"
December 16° 34° -28° (1914) 69° (1998) 2.24" 8.9"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Dec 1 21° 39° -3° (1976) 60° (1962) 0.09" 0.2"
Dec 2 21° 39° -6° (1976) 62° (1951) 0.09" 0.2"
Dec 3 20° 38° -13° (1940) 66° (1951) 0.09" 0.2"
Dec 4 20° 38° -5° (1991) 66° (1998) 0.09" 0.3"
Dec 5 20° 37° -10° (2005) 69° (1998) 0.08" 0.2"
Dec 6 19° 37° -8° (1964) 68° (2001) 0.09" 0.2"
Dec 7 19° 37° -14° (2005) 63° (1916) 0.09" 0.2"
Dec 8 18° 36° -11° (1902) 63° (1946) 0.08" 0.3"
Dec 9 18° 36° -18° (1958) 61° (1946) 0.09" 0.2"
Dec 10 17° 35° -22° (1919) 56° (1911) 0.09" 0.3"
Dec 11 17° 35° -20° (1972) 62° (1949) 0.08" 0.3"
Dec 12 17° 35° -11° (1976) 60° (1949) 0.08" 0.3"
Dec 13 16° 34° -24° (1903) 59° (1991) 0.08" 0.3"
Dec 14 16° 34° -20° (1904) 59° (1975) 0.07" 0.3"
Dec 15 16° 34° -20° (1903) 57° (1975) 0.08" 0.3"
Dec 16 15° 33° -15° (1951) 57° (1939) 0.07" 0.3"
Dec 17 15° 33° -15° (1903) 56° (1984) 0.07" 0.3"
Dec 18 15° 33° -19° (1985) 58° (1939) 0.06" 0.3"
Dec 19 15° 32° -24° (1985) 59° (1918) 0.07" 0.3"
Dec 20 14° 32° -23° (1985) 60° (1918) 0.06" 0.4"
Dec 21 14° 32° -19° (1963) 58° (1918) 0.07" 0.3"
Dec 22 14° 32° -18° (1963) 52° (1918) 0.06" 0.3"
Dec 23 14° 32° -20° (1963) 56° (1965) 0.06" 0.3"
Dec 24 13° 31° -23° (1983) 57° (1979) 0.07" 0.4"
Dec 25 13° 31° -22° (2000) 57° (1982) 0.05" 0.3"
Dec 26 13° 31° -28° (1914) 55° (1982) 0.06" 0.3"
Dec 27 13° 31° -26° (1950) 55° (1946) 0.05" 0.3"
Dec 28 13° 31° -22° (1924) 58° (1982) 0.06" 0.3"
Dec 29 13° 31° -17° (1925) 65° (1984) 0.06" 0.4"
Dec 30 12° 31° -21° (1909) 58° (1929) 0.05" 0.3"
Dec 31 12° 30° -18° (1914) 59° (1965) 0.05" 0.3"
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