| Year | Temperature (°F) | to Normal (°F) |
|---|---|---|
| 2022 | 20.4 | -1.6 |
| 2021 | 27.6 | 5.6 |
| 2020 | 20.9 | -1.1 |
| 2017 | 22.0 | 0.0 |
| 2016 | 15.5 | -6.5 |
| 2015 | 20.1 | -2.0 |
| 2014 | 27.7 | 5.7 |
| 2013 | 15.3 | -6.7 |
| 2012 | 25.4 | 3.4 |
| 2011 | 22.4 | 0.4 |
| 2010 | 24.7 | 2.7 |
| 2009 | 16.7 | -5.3 |
| 2007 | 21.2 | -0.8 |
| 2006 | 23.1 | 1.0 |
| 2005 | 20.9 | -1.1 |
| 2004 | 26.3 | 4.3 |
| 2003 | 28.3 | 6.3 |
| 2002 | 26.4 | 4.4 |
| 2000 | 16.6 | -5.4 |
| 1998 | 17.8 | -4.2 |
| 1995 | 26.3 | 4.3 |
| 1994 | 23.2 | 1.2 |
| 1993 | 21.9 | -0.1 |
| 1992 | 18.3 | -3.7 |
| 1991 | 19.9 | -2.1 |
| 1990 | 12.1 | -9.9 |
| 1989 | 19.6 | -2.4 |
| 1988 | 13.8 | -8.2 |
| 1987 | 23.1 | 1.0 |
| 1986 | 22.6 | 0.6 |
| 1984 | 15.3 | -6.7 |
| 1983 | 13.5 | -8.5 |
| 1981 | 24.9 | 2.9 |
| 1980 | 29.0 | 7.0 |
| 1979 | 25.1 | 3.1 |
| 1978 | 12.6 | -9.4 |
| 1977 | 27.1 | 5.1 |