| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 38.6 | 45.4 | 54.4 | 62.9 | 72.1 | 81.4 | 90.2 | 90.0 | 79.5 | 66.8 | 49.3 | 39.1 | 64.1 |
| Highest Mean Max. Temperature (F) | 45.4 | 53.8 | 63.8 | 72.6 | 81.5 | 88.2 | 95.2 | 96.5 | 86.8 | 75.4 | 57.2 | 44.2 | 96.5 |
| Year Highest Occurred | 1998 | 1991 | 1992 | 1987 | 1992 | 1986 | 1985 | 1971 | 1990 | 1988 | 1999 | 1977 | 1971 |
| Lowest Mean Max. Temperature (F) | 27.4 | 30.7 | 47.7 | 53.5 | 66.0 | 75.9 | 79.2 | 84.0 | 69.7 | 61.4 | 37.5 | 24.4 | 24.4 |
| Year Lowest Occurred | 1979 | 1989 | 1976 | 1975 | 1977 | 1998 | 1993 | 1993 | 1985 | 1985 | 1985 | 1985 | 1985 |
| Mean Temperature (F) | 30.2 | 35.9 | 42.8 | 50.0 | 58.0 | 65.7 | 72.9 | 72.8 | 63.4 | 53.1 | 39.9 | 30.8 | 51.3 |
| Highest Mean Temperature (F) | 37.5 | 43.0 | 49.9 | 56.9 | 65.0 | 71.9 | 77.9 | 78.0 | 70.0 | 59.4 | 46.1 | 36.8 | 78.0 |
| Year Highest Occurred | 1998 | 1992 | 1986 | 1987 | 1992 | 1986 | 1985 | 1971 | 1998 | 1988 | 1999 | 1977 | 1971 |
| Lowest Mean Temperature (F) | 17.5 | 20.7 | 36.6 | 41.8 | 52.6 | 60.5 | 63.1 | 68.1 | 56.8 | 48.6 | 28.3 | 14.9 | 14.9 |
| Year Lowest Occurred | 1979 | 1989 | 1976 | 1975 | 1977 | 1991 | 1993 | 1976 | 1985 | 1971 | 1985 | 1985 | 1985 |
| Mean Min. Temperature (F) | 21.7 | 26.4 | 31.1 | 37.1 | 43.8 | 49.9 | 55.6 | 55.5 | 47.3 | 39.3 | 30.4 | 22.4 | 38.4 |
| Highest Mean Min. Temperature (F) | 29.5 | 33.9 | 38.7 | 41.2 | 48.5 | 55.5 | 61.1 | 60.9 | 54.0 | 43.3 | 36.2 | 29.4 | 61.1 |
| Year Highest Occurred | 1998 | 1986 | 1986 | 1987 | 1992 | 1986 | 1998 | 1983 | 1998 | 1988 | 1981 | 1995 | 1998 |
| Lowest Mean Min. Temperature (F) | 7.6 | 10.6 | 24.9 | 30.2 | 38.2 | 43.7 | 47.0 | 51.3 | 41.8 | 34.5 | 19.1 | 5.4 | 5.4 |
| Year Lowest Occurred | 1979 | 1989 | 1977 | 1975 | 1975 | 1991 | 1993 | 1995 | 1971 | 1971 | 1985 | 1985 | 1985 |
| Mean Precipitation (in.) | 1.78 | 1.49 | 1.71 | 1.49 | 1.50 | 0.93 | 0.39 | 0.33 | 0.82 | 0.90 | 1.83 | 1.79 | 14.96 |
| Highest Precipitation (in.) | 3.85 | 4.54 | 3.66 | 3.12 | 5.04 | 2.72 | 1.52 | 2.02 | 3.83 | 2.76 | 4.31 | 4.99 | 5.04 |
| Year Highest Occurred | 1998 | 1986 | 1989 | 1978 | 1998 | 1993 | 1982 | 1976 | 1986 | 2000 | 1988 | 1996 | 1998 |
| Lowest Precipitation (in.) | 0.26 | 0.44 | 0.09 | 0.21 | 0.00 | 0.05 | 0.00 | 0.00 | 0.00 | 0.00 | 0.06 | 0.14 | 0.00 |
| Year Lowest Occurred | 1985 | 1973 | 1994 | 1987 | 1992 | 1996 | 1999 | 1996 | 1999 | 1988 | 1976 | 1986 | 1992 |
| Heating Degree Days (F) | 1081. | 814. | 691. | 452. | 239. | 90. | 18. | 19. | 135. | 374. | 755. | 1062. | 5730. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 3. | 20. | 109. | 263. | 258. | 87. | 3. | 0. | 0. | 743. |