| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 31.0 | 36.7 | 43.1 | 53.4 | 63.0 | 70.8 | 78.7 | 79.7 | 69.0 | 55.8 | 38.8 | 31.9 | 54.3 |
| Highest Mean Max. Temperature (F) | 42.8 | 47.6 | 55.4 | 61.4 | 69.4 | 77.3 | 86.3 | 89.7 | 80.7 | 64.5 | 48.5 | 41.6 | 89.7 |
| Year Highest Occurred | 1986 | 1992 | 1992 | 1987 | 1993 | 1986 | 1985 | 1971 | 1990 | 1988 | 1999 | 1979 | 1971 |
| Lowest Mean Max. Temperature (F) | 15.3 | 25.2 | 35.7 | 44.2 | 53.2 | 63.5 | 65.5 | 71.1 | 54.4 | 48.5 | 22.9 | 17.8 | 15.3 |
| Year Lowest Occurred | 1979 | 1989 | 1975 | 1975 | 1996 | 1998 | 1993 | 1987 | 1985 | 1995 | 1985 | 1983 | 1979 |
| Mean Temperature (F) | 21.0 | 26.2 | 32.1 | 40.9 | 49.2 | 56.4 | 62.2 | 62.1 | 53.4 | 43.9 | 30.5 | 23.3 | 41.8 |
| Highest Mean Temperature (F) | 34.6 | 36.5 | 40.0 | 47.2 | 53.6 | 61.5 | 67.7 | 68.8 | 60.0 | 48.7 | 39.8 | 32.9 | 68.8 |
| Year Highest Occurred | 1986 | 1991 | 1992 | 1987 | 1993 | 1988 | 1998 | 1971 | 1998 | 1988 | 1999 | 1999 | 1971 |
| Lowest Mean Temperature (F) | 5.8 | 12.9 | 25.6 | 32.5 | 43.8 | 52.1 | 54.0 | 56.1 | 43.4 | 37.5 | 13.6 | 6.8 | 5.8 |
| Year Lowest Occurred | 1979 | 1989 | 1975 | 1975 | 1996 | 1998 | 1993 | 1987 | 1985 | 1984 | 1985 | 1983 | 1979 |
| Mean Min. Temperature (F) | 10.9 | 15.6 | 21.1 | 28.4 | 35.3 | 41.9 | 45.7 | 44.5 | 37.7 | 32.0 | 22.1 | 14.7 | 29.2 |
| Highest Mean Min. Temperature (F) | 26.4 | 27.3 | 29.2 | 33.0 | 38.6 | 45.9 | 50.9 | 47.9 | 42.7 | 35.4 | 31.0 | 25.2 | 50.9 |
| Year Highest Occurred | 1986 | 1977 | 1986 | 1987 | 1988 | 1988 | 1998 | 1999 | 1997 | 1983 | 1999 | 1999 | 1998 |
| Lowest Mean Min. Temperature (F) | -6.8 | 0.6 | 15.4 | 20.8 | 31.9 | 39.1 | 42.5 | 41.1 | 32.3 | 26.0 | 4.3 | -4.2 | -6.8 |
| Year Lowest Occurred | 1982 | 1989 | 1996 | 1975 | 1995 | 1995 | 1999 | 1987 | 1985 | 1984 | 1985 | 1983 | 1982 |
| Mean Precipitation (in.) | 2.23 | 1.74 | 1.80 | 1.85 | 2.77 | 3.07 | 1.67 | 1.55 | 2.05 | 2.12 | 2.55 | 2.22 | 25.62 |
| Highest Precipitation (in.) | 4.81 | 6.14 | 3.77 | 3.87 | 6.75 | 7.25 | 8.99 | 5.69 | 6.34 | 6.20 | 8.55 | 5.16 | 8.99 |
| Year Highest Occurred | 1990 | 1986 | 1988 | 1991 | 1981 | 1991 | 1987 | 1989 | 1985 | 1990 | 1990 | 1996 | 1987 |
| Lowest Precipitation (in.) | 0.27 | 0.38 | 0.85 | 0.41 | 1.25 | 1.18 | 0.02 | 0.27 | 0.15 | 0.11 | 0.18 | 0.40 | 0.02 |
| Year Lowest Occurred | 1985 | 1984 | 1992 | 1977 | 1973 | 1977 | 1991 | 1998 | 1994 | 1987 | 1987 | 1985 | 1991 |
| Heating Degree Days (F) | 1364. | 1088. | 1021. | 723. | 491. | 269. | 140. | 156. | 369. | 654. | 1037. | 1294. | 8606. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 0. | 9. | 52. | 67. | 18. | 0. | 0. | 0. | 146. |