| Year | Temperature (°F) | to Normal (°F) |
|---|---|---|
| 2022 | 23.0 | -1.7 |
| 2021 | 27.9 | 3.1 |
| 2020 | 23.1 | -1.6 |
| 2019 | 23.7 | -1.0 |
| 2018 | 24.0 | -0.8 |
| 2017 | 25.1 | 0.4 |
| 2016 | 23.3 | -1.4 |
| 2015 | 23.9 | -0.8 |
| 2014 | 32.2 | 7.5 |
| 2013 | 18.5 | -6.3 |
| 2012 | 26.2 | 1.5 |
| 2011 | 22.6 | -2.1 |
| 2010 | 28.2 | 3.4 |
| 2009 | 18.2 | -6.5 |
| 2008 | 24.3 | -0.4 |
| 2007 | 24.6 | -0.1 |
| 2006 | 27.2 | 2.5 |
| 2005 | 24.0 | -0.7 |
| 2003 | 29.9 | 5.2 |
| 2002 | 30.0 | 5.3 |
| 2001 | 18.2 | -6.5 |
| 2000 | 24.7 | 0.0 |
| 1999 | 25.0 | 0.3 |
| 1998 | 22.8 | -1.9 |
| 1994 | 27.3 | 2.6 |
| 1992 | 18.9 | -5.9 |
| 1989 | 22.9 | -1.8 |
| 1986 | 25.1 | 0.4 |
| 1985 | 14.0 | -10.7 |
| 1984 | 18.1 | -6.6 |
| 1981 | 29.8 | 5.1 |
| 1980 | 26.7 | 2.0 |
| 1973 | 26.1 | 1.4 |
| 1971 | 19.0 | -5.8 |
| 1970 | 22.9 | -1.8 |
| 1969 | 28.3 | 3.6 |
| 1968 | 24.0 | -0.7 |
| 1967 | 19.2 | -5.5 |
| 1966 | 21.6 | -3.1 |
| 1965 | 21.6 | -3.1 |
| 1964 | 28.1 | 3.3 |