Contiguous U.S. CEI (All Steps Combined) Cold Season (October-March) 1911-2019
Date Actual Percent
1911 26.60
1912 35.36
1913 25.38
1914 14.88
1915 21.06
1916 20.20
1917 32.80
1918 32.34
1919 16.60
1920 27.60
1921 20.12
1922 18.34
1923 11.74
1924 15.94
1925 18.86
1926 16.06
1927 11.92
1928 12.72
1929 19.06
1930 13.40
1931 26.26
1932 31.94
1933 14.94
1934 34.14
1935 21.56
1936 22.02
1937 26.32
1938 13.78
1939 11.38
1940 22.40
1941 15.52
1942 17.88
1943 11.44
1944 9.74
1945 7.72
1946 7.64
1947 7.98
1948 13.76
1949 26.50
1950 17.80
1951 19.68
1952 20.70
1953 11.72
1954 22.74
1955 14.72
1956 19.66
1957 12.32
1958 22.74
1959 10.80
1960 20.94
1961 12.40
1962 11.36
1963 13.46
1964 17.12
1965 13.04
1966 11.68
1967 13.14
1968 8.84
1969 15.94
1970 16.86
1971 9.34
1972 11.62
1973 28.86
1974 23.54
1975 10.62
1976 16.16
1977 35.98
1978 31.66
1979 27.00
1980 11.56
1981 30.22
1982 11.96
1983 28.42
1984 18.68
1985 20.64
1986 12.48
1987 17.64
1988 11.22
1989 8.52
1990 12.82
1991 16.56
1992 23.14
1993 18.16
1994 11.08
1995 21.16
1996 29.30
1997 20.02
1998 23.06
1999 33.88
2000 39.04
2001 14.96
2002 25.06
2003 16.58
2004 14.64
2005 27.84
2006 28.12
2007 17.12
2008 16.84
2009 17.98
2010 20.00
2011 16.70
2012 36.64
2013 14.06
2014 23.62
2015 24.46
2016 46.66
2017 48.22
2018 20.72
2019 25.50