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Statewide snowfall records in Illinois start in 1902, according to the web page of the Illinois state climatology office.

There is no long-term trend in snowfall since 1902. However, some decades were snowier than others, such as the 1910s, 1960s, and 1970s. In fact, the 1970s were the snowiest decade on record with an average snowfall of 27.2 inches.

Snowfall amounts dropped steeply with less year to year variability for much of the 1980s and into the early 2000s. However, snowfall amounts in the last 6 winters have been more variable with the winter of 2014 being about as snowy as the late 1970s.

The snowiest winter on record was 1979 with 44.5 inches. Here are the 5 snowiest winters on record:

1979 with 44.5 inches

1978 with 44.4 inches

1912 with 39.5 inches

2014 with 39.4 inches

1960 with 38.6 inches

Snowfall is accumulated from July 1 of the first year to June 30 of the second year. The second year is used in the plot and table (for example, 2006 refers to the 2005-2006 season).

Snowfall data by year in inches.

1902 13.9

1903 20.3

1904 26.4

1905 24.1

1906 23.2

1907 13.2

1908 22.9

1909 15.9

1910 28.4

1911 13.8

1912 39.5

1913 16.6

1914 26.0

1915 22.1

1916 23.7

1917 13.8

1918 34.6

1919 13.4

1920 11.6

1921 9.4

1922 11.0

1923 12.9

1924 23.2

1925 13.7

1926 28.0

1927 22.6

1928 11.5

1929 16.7

1930 30.9

1931 13.9

1932 13.0

1933 19.7

1934 18.0

1935 12.1

1936 26.2

1937 15.1

1938 12.4

1939 21.6

1940 23.5

1941 17.6

1942 18.7

1943 26.7

1944 19.0

1945 24.4

1946 18.7

1947 18.0

1948 21.4

1949 13.1

1950 11.0

1951 29.0

1952 30.6

1953 14.9

1954 11.5

1955 18.3

1956 19.0

1957 17.1

1958 14.8

1959 21.2

1960 38.6

1961 17.4

1962 30.6

1963 17.9

1964 26.8

1965 33.6

1966 9.9

1967 19.8

1968 18.0

1969 14.6

1970 31.7

1971 13.2

1972 20.2

1973 13.1

1974 31.2

1975 27.3

1976 20.5

1977 25.9

1978 44.4

1979 44.5 (snowiest winter, just beating 1978)

1980 19.8

1981 16.5

1982 32.6

1983 11.0

1984 30.9

1985 19.8

1986 17.8

1987 15.7

1988 19.2

1989 17.1

1990 15.7

1991 17.5

1992 11.0

1993 24.4

1994 22.6

1995 9.8

1996 18.1

1997 20.5

1998 15.8

1999 21.0

2000 14.5

2001 22.2

2002 12.1

2003 18.9

2004 13.4

2005 14.0

2006 13.7

2007 19.3

2008 26.7

2009 18.6

2010 23.2

2011 29.4

2012 9.2 (least snowiest winter)

2013 20.4

2014 39.4

2015 23.3

2016 12.4

2017 9.6

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