| Year | Temperature (°F) | to Normal (°F) |
|---|---|---|
| 2023 | 17.4 | -2.4 |
| 2022 | 15.4 | -4.3 |
| 2021 | 19.3 | -0.4 |
| 2020 | 19.5 | -0.3 |
| 2019 | 20.2 | 0.4 |
| 2018 | 25.2 | 5.4 |
| 2017 | 12.8 | -7.0 |
| 2016 | 18.8 | -1.0 |
| 2015 | 24.4 | 4.6 |
| 2014 | 25.6 | 5.9 |
| 2013 | 15.2 | -4.6 |
| 2012 | 20.4 | 0.6 |
| 2011 | 18.8 | -1.0 |
| 2010 | 23.1 | 3.3 |
| 2009 | 21.5 | 1.7 |
| 2008 | 12.8 | -7.0 |
| 2007 | 15.1 | -4.7 |
| 2006 | 20.3 | 0.6 |
| 2005 | 20.5 | 0.8 |
| 2004 | 17.7 | -2.1 |
| 2003 | 26.5 | 6.7 |
| 2002 | 17.4 | -2.3 |
| 2001 | 20.3 | 0.5 |
| 2000 | 20.0 | 0.2 |
| 1999 | 20.1 | 0.4 |
| 1998 | 22.0 | 2.2 |
| 1997 | 19.4 | -0.3 |
| 1996 | 18.1 | -1.7 |
| 1995 | 20.5 | 0.8 |
| 1994 | 21.7 | 1.9 |
| 1993 | 15.0 | -4.8 |
| 1992 | 18.6 | -1.2 |
| 1991 | 16.0 | -3.8 |
| 1990 | 19.8 | 0.1 |
| 1989 | 12.2 | -7.6 |
| 1988 | 17.2 | -2.6 |
| 1987 | 15.9 | -3.9 |
| 1986 | 21.9 | 2.1 |
| 1985 | 15.4 | -4.4 |
| 1984 | 13.8 | -6.0 |
| 1983 | 21.8 | 2.0 |
| 1981 | 22.2 | 2.4 |
| 1980 | 14.5 | -5.3 |
| 1979 | 8.7 | -11.1 |
| 1978 | 21.2 | 1.4 |
| 1976 | 19.2 | -0.6 |
| 1975 | 15.8 | -4.0 |
| 1974 | 14.8 | -5.0 |
| 1972 | 17.6 | -2.2 |
| 1971 | 18.8 | -0.9 |
| 1970 | 19.7 | -0.1 |
| 1969 | 18.4 | -1.4 |
| 1968 | 16.0 | -3.8 |
| 1967 | 19.1 | -0.6 |
| 1966 | 14.5 | -5.3 |
| 1965 | 18.6 | -1.2 |
| 1964 | 12.1 | -7.6 |
| 1963 | 15.9 | -3.8 |
| 1962 | 12.7 | -7.1 |
| 1961 | 16.2 | -3.6 |
| 1960 | 12.2 | -7.6 |
| 1959 | 19.0 | -0.8 |
| 1958 | 15.5 | -4.2 |
| 1957 | 7.6 | -12.1 |
| 1956 | 17.0 | -2.8 |
| 1955 | 11.8 | -8.0 |
| 1954 | 19.5 | -0.3 |
| 1953 | 24.5 | 4.7 |
| 1952 | 9.5 | -10.3 |
| 1951 | 12.2 | -7.6 |
| 1950 | 8.9 | -10.8 |
| 1949 | 1.7 | -18.1 |
| 1948 | 17.8 | -2.0 |
| 1947 | 11.1 | -8.7 |
| 1946 | 13.2 | -6.6 |
| 1945 | 17.4 | -2.3 |
| 1944 | 13.4 | -6.4 |
| 1943 | 10.1 | -9.7 |
| 1942 | 12.9 | -6.9 |
| 1941 | 15.8 | -4.0 |
| 1940 | 19.1 | -0.6 |
| 1939 | 17.5 | -2.3 |
| 1938 | 19.1 | -0.7 |