| Year | Temperature (°F) | to Normal (°F) |
|---|---|---|
| 2022 | 35.2 | -10.7 |
| 2021 | 42.4 | -3.5 |
| 2020 | 44.0 | -1.9 |
| 2019 | 45.8 | -0.1 |
| 2018 | 45.6 | -0.2 |
| 2017 | 43.1 | -2.8 |
| 2016 | 49.9 | 4.0 |
| 2015 | 44.8 | -1.1 |
| 2014 | 43.8 | -2.0 |
| 2013 | 43.6 | -2.3 |
| 2012 | 47.5 | 1.7 |
| 2011 | 41.1 | -4.7 |
| 2010 | 44.4 | -1.5 |
| 2009 | 44.3 | -1.6 |
| 2008 | 39.9 | -6.0 |
| 2007 | 46.8 | 0.9 |
| 2005 | 46.5 | 0.7 |
| 2004 | 48.3 | 2.5 |
| 2003 | 44.8 | -1.0 |
| 2002 | 44.9 | -1.0 |
| 2000 | 51.7 | 5.8 |
| 1998 | 47.5 | 1.6 |
| 1997 | 45.1 | -0.8 |
| 1996 | 47.4 | 1.5 |
| 1995 | 45.7 | -0.1 |
| 1994 | 49.9 | 4.1 |
| 1993 | 46.1 | 0.2 |
| 1992 | 50.8 | 5.0 |
| 1991 | 44.9 | -1.0 |
| 1990 | 51.5 | 5.6 |
| 1989 | 49.5 | 3.7 |
| 1988 | 50.4 | 4.5 |
| 1987 | 53.4 | 7.5 |
| 1986 | 47.8 | 1.9 |
| 1985 | 49.7 | 3.9 |
| 1984 | 44.4 | -1.4 |
| 1983 | 43.4 | -2.4 |
| 1982 | 41.8 | -4.1 |
| 1981 | 47.7 | 1.8 |
| 1980 | 49.0 | 3.2 |
| 1979 | 45.6 | -0.3 |
| 1978 | 47.6 | 1.7 |
| 1977 | 49.7 | 3.9 |
| 1976 | 45.6 | -0.2 |
| 1975 | 40.6 | -5.3 |
| 1974 | 47.3 | 1.4 |
| 1973 | 44.7 | -1.1 |
| 1972 | 43.5 | -2.3 |
| 1971 | 43.6 | -2.2 |
| 1970 | 40.2 | -5.7 |
| 1969 | 49.4 | 3.6 |
| 1968 | 42.8 | -3.1 |