| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 25.5 | 32.4 | 44.6 | 59.7 | 72.5 | 81.3 | 85.2 | 82.5 | 73.7 | 61.1 | 43.6 | 29.9 | 57.7 |
| Highest Mean Max. Temperature (F) | 38.8 | 42.8 | 53.3 | 67.7 | 80.7 | 88.7 | 91.4 | 88.4 | 81.4 | 68.7 | 53.5 | 38.1 | 91.4 |
| Year Highest Occurred | 1990 | 1987 | 2000 | 1977 | 1988 | 1988 | 1980 | 1988 | 1998 | 1973 | 1999 | 1998 | 1980 |
| Lowest Mean Max. Temperature (F) | 13.8 | 23.8 | 35.3 | 51.8 | 65.4 | 76.3 | 79.2 | 77.8 | 67.2 | 55.6 | 36.0 | 15.5 | 13.8 |
| Year Lowest Occurred | 1977 | 1978 | 1975 | 1975 | 1983 | 1982 | 1992 | 1994 | 1993 | 1980 | 1996 | 1983 | 1977 |
| Mean Temperature (F) | 15.9 | 22.6 | 34.6 | 48.4 | 60.6 | 69.6 | 74.0 | 71.6 | 62.7 | 50.6 | 35.5 | 21.8 | 47.3 |
| Highest Mean Temperature (F) | 28.9 | 34.1 | 42.5 | 55.4 | 68.0 | 74.9 | 78.8 | 77.8 | 68.8 | 57.6 | 43.0 | 29.2 | 78.8 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1977 | 1977 | 1991 | 1980 | 1995 | 1998 | 1973 | 1999 | 1998 | 1980 |
| Lowest Mean Temperature (F) | 3.7 | 11.7 | 25.4 | 42.2 | 55.0 | 64.1 | 68.5 | 67.1 | 57.0 | 45.1 | 28.0 | 7.2 | 3.7 |
| Year Lowest Occurred | 1977 | 1978 | 1975 | 1975 | 1997 | 1982 | 1992 | 1992 | 1993 | 1988 | 1991 | 1983 | 1977 |
| Mean Min. Temperature (F) | 6.3 | 12.8 | 24.5 | 37.1 | 48.7 | 57.9 | 62.8 | 60.7 | 51.7 | 40.1 | 27.4 | 13.6 | 37.0 |
| Highest Mean Min. Temperature (F) | 19.0 | 27.2 | 32.7 | 43.1 | 55.7 | 63.2 | 67.2 | 68.4 | 56.8 | 46.7 | 33.6 | 23.3 | 68.4 |
| Year Highest Occurred | 1990 | 1998 | 1973 | 1977 | 1977 | 1991 | 1999 | 1995 | 1978 | 1971 | 1994 | 1997 | 1995 |
| Lowest Mean Min. Temperature (F) | -6.4 | -0.5 | 15.5 | 32.5 | 41.8 | 51.8 | 57.3 | 55.3 | 45.5 | 33.7 | 18.8 | -1.2 | -6.4 |
| Year Lowest Occurred | 1977 | 1978 | 1975 | 1975 | 1971 | 1982 | 1971 | 1992 | 1974 | 1988 | 1976 | 1983 | 1977 |
| Mean Precipitation (in.) | 1.19 | 0.99 | 2.00 | 3.38 | 3.38 | 4.00 | 4.25 | 4.28 | 3.40 | 2.16 | 2.10 | 1.23 | 32.36 |
| Highest Precipitation (in.) | 3.03 | 2.71 | 3.69 | 7.31 | 6.85 | 10.79 | 9.35 | 9.84 | 8.51 | 5.09 | 6.23 | 2.91 | 10.79 |
| Year Highest Occurred | 1996 | 1998 | 1973 | 1973 | 1991 | 1993 | 1987 | 1980 | 1980 | 1984 | 1991 | 1990 | 1993 |
| Lowest Precipitation (in.) | 0.14 | 0.15 | 0.30 | 1.40 | 0.94 | 1.33 | 1.42 | 0.54 | 0.53 | 0.28 | 0.00 | 0.30 | 0.00 |
| Year Lowest Occurred | 1981 | 1995 | 1978 | 2000 | 1988 | 1989 | 1975 | 1976 | 1979 | 1976 | 1976 | 1998 | 1976 |
| Heating Degree Days (F) | 1536. | 1202. | 959. | 521. | 202. | 38. | 6. | 17. | 152. | 467. | 893. | 1347. | 7340. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 8. | 49. | 162. | 272. | 208. | 70. | 6. | 0. | 0. | 775. |