Mailing Address:
Pennsylvania State Climatologist503 Walker Building
University Park, PA 16802
| Season | September | October | November | December | January | February | March | April | May | Seasonal |
|---|---|---|---|---|---|---|---|---|---|---|
| 2010 - 2011 | 0.0 | 0.0 | 0.8 | 35.3 | 36.1 | |||||
| 2009 - 2010 | 0.0 | 2.7 | 0.6 | 20.1 | 42.1 | 12.4 | 0.8 | 1.7 | 0.0 | 80.4 |
| 2008 - 2009 | 0.0 | 1.7 | 20.0 | 23.3 | 17.8 | 23.5 | 17.9 | 0.0 | 0.0 | 104.2 |
| 2007 - 2008 | 0.0 | 0.0 | 3.4 | 22.4 | 24.4 | 25.3 | 18.2 | 8.9 | 0.0 | 102.6 |
| 2006 - 2007 | 0.0 | 1.3 | 2.2 | 8.4 | 8.1 | 16.8 | 4.2 | 2.4 | 0.0 | 43.4 |
| 2005 - 2006 | 0.0 | 0.2 | 9.8 | 33.6 | 13.3 | 9.0 | 16.6 | 3.9 | 0.0 | 86.4 |
| 2004 - 2005 | 0.0 | 0.0 | 0.1 | 6.5 | 38.8 | 11.7 | 14.8 | 1.5 | 0.0 | 73.4 |
| 2003 - 2004 | 0.0 | 0.0 | 7.0 | 24.2 | 31.9 | 25.6 | 4.7 | 2.4 | 0.0 | 95.8 |
| 2002 - 2003 | 0.0 | 0.9 | 8.4 | 27.0 | 14.5 | 11.6 | 10.9 | 1.5 | 0.2 | 75.0 |
| 2001 - 2002 | 0.0 | 1.3 | 0.0 | 12.1 | 14.3 | 8.9 | 19.9 | 1.3 | 0.0 | 57.8 |
| 2000 - 2001 | 0.0 | 0.2 | 17.1 | 33.4 | 19.1 | 9.4 | 2.3 | 1.1 | 0.0 | 82.6 |
| 1999 - 2000 | 0.0 | 0.0 | 2.8 | 15.6 | 35.4 | 8.4 | 17.6 | 0.1 | 0.0 | 79.9 |
| 1998 - 1999 | 0.0 | 0.0 | 0.2 | 12.6 | 7.1 | 0.7 | 16.7 | 0.0 | 0.0 | 37.3 |
| 1997 - 1998 | 0.0 | 0.8 | 9.4 | 16.0 | 18.6 | 11.3 | 7.9 | 1.5 | 0.0 | 65.5 |
| 1996 - 1997 | 0.0 | 0.1 | 13.3 | 9.4 | 21.0 | 11.1 | 13.0 | 1.5 | 0.1 | 69.5 |
| 1995 - 1996 | 0.0 | 0.0 | 20.3 | 28.3 | 11.5 | 15.4 | 5.6 | 1.6 | 0.0 | 82.7 |
| 1994 - 1995 | 0.0 | 0.0 | 3.2 | 1.6 | 31.6 | 21.6 | 20.3 | 1.8 | 0.0 | 80.1 |
| 1993 - 1994 | 0.0 | 2.0 | 6.2 | 19.0 | 14.4 | 20.6 | 30.0 | 1.1 | 0.0 | 93.3 |
| 1992 - 1993 | 0.0 | 1.2 | 4.4 | 29.3 | 19.3 | 7.8 | 23.1 | 2.9 | 0.0 | 88.0 |
| 1991 - 1992 | 0.0 | 0.0 | 4.9 | 19.0 | 16.5 | 14.6 | 2.3 | 1.6 | 0.0 | 58.9 |
| 1990 - 1991 | 0.0 | 0.0 | 2.7 | 11.3 | 18.1 | 10.6 | 2.6 | 4.0 | 0.1 | 49.4 |
| 1989 - 1990 | 0.0 | 0.2 | 9.3 | 33.4 | 6.7 | 11.4 | 5.3 | 4.7 | 1.7 | 72.7 |
| 1988 - 1989 | 0.0 | 1.5 | 2.0 | 17.5 | 12.3 | 21.9 | 14.7 | 1.1 | 0.0 | 71.0 |
| 1987 - 1988 | 0.0 | 0.9 | 6.7 | 20.3 | 24.3 | 7.3 | 9.4 | 8.0 | 0.0 | 76.9 |
| 1986 - 1987 | 0.0 | 0.0 | 9.8 | 8.0 | 17.7 | 15.2 | 7.3 | 4.4 | 0.0 | 62.4 |
| 1985 - 1986 | 0.0 | 0.0 | 0.4 | 35.4 | 42.0 | 18.3 | 6.7 | 8.2 | 0.0 | 111.0 |
| 1984 - 1985 | 0.0 | 0.0 | 4.1 | 16.4 | 20.3 | 17.2 | 23.9 | 0.5 | 0.0 | 82.4 |
| 1983 - 1984 | 0.0 | 0.0 | 7.1 | 22.3 | 9.8 | 9.1 | 9.3 | 3.0 | 0.0 | 60.6 |
| 1982 - 1983 | 0.0 | 0.7 | 5.0 | 15.4 | 24.7 | 9.7 | 12.1 | 10.0 | 0.0 | 77.6 |
| 1981 - 1982 | 0.0 | 0.4 | 3.7 | 27.3 | 19.3 | 14.2 | 14.1 | 0.2 | 0.0 | 79.2 |
| 1980 - 1981 | 0.0 | 1.1 | 11.2 | 17.5 | 9.7 | 15.9 | 12.2 | 0.3 | 0.0 | 67.9 |
| 1979 - 1980 | 0.0 | 0.6 | 3.0 | 9.2 | 23.3 | 19.8 | 4.7 | 2.2 | 0.0 | 62.8 |
| 1978 - 1979 | 0.0 | 0.1 | 2.0 | 27.0 | 49.6 | 13.9 | 6.8 | 0.4 | 0.0 | 99.8 |
| 1977 - 1978 | 0.0 | 0.0 | 12.7 | 34.8 | 32.7 | 14.0 | 8.7 | 3.1 | 0.0 | 106.0 |
| 1976 - 1977 | 0.0 | 1.9 | 18.6 | 23.5 | 32.4 | 11.2 | 8.9 | 1.0 | 0.3 | 97.8 |
| 1975 - 1976 | 0.0 | 0.0 | 2.0 | 22.5 | 16.3 | 16.5 | 15.9 | 6.9 | 0.0 | 80.1 |
| 1974 - 1975 | 0.0 | 0.8 | 3.9 | 16.6 | 11.3 | 13.3 | 9.6 | 6.0 | 0.0 | 61.5 |
| 1973 - 1974 | 0.0 | 0.1 | 6.1 | 11.3 | 6.8 | 12.0 | 9.9 | 2.1 | 0.1 | 48.4 |
| 1972 - 1973 | 0.0 | 0.5 | 7.4 | 17.3 | 12.0 | 34.0 | 13.5 | 2.5 | 0.0 | 87.2 |
| 1971 - 1972 | 0.0 | 0.0 | 13.2 | 7.8 | 20.7 | 20.7 | 29.9 | 1.2 | 0.0 | 93.5 |
| 1970 - 1971 | 0.0 | 0.0 | 7.2 | 21.3 | 15.8 | 22.8 | 9.1 | 1.7 | 0.0 | 77.9 |
| 1969 - 1970 | 0.0 | 1.5 | 9.7 | 32.6 | 13.5 | 11.2 | 6.7 | 0.2 | 0.0 | 75.4 |
| 1968 - 1969 | 0.0 | 0.4 | 10.6 | 19.6 | 14.3 | 13.6 | 8.6 | 0.0 | 0.0 | 67.1 |
| 1967 - 1968 | 0.0 | 0.0 | 19.4 | 9.7 | 9.8 | 20.4 | 20.0 | 2.6 | 0.1 | 82.0 |
| 1966 - 1967 | 0.0 | 0.0 | 7.6 | 18.3 | 30.8 | 8.5 | 11.4 | 4.2 | 1.4 | 82.2 |
| 1965 - 1966 | 0.0 | 0.4 | 5.8 | 5.6 | 16.9 | 12.8 | 20.1 | 1.8 | 0.0 | 63.4 |
| 1964 - 1965 | 0.0 | 0.0 | 2.6 | 14.9 | 25.4 | 20.7 | 6.5 | 1.9 | 0.0 | 72.0 |
| 1963 - 1964 | 0.0 | 0.0 | 7.0 | 37.9 | 15.2 | 19.6 | 14.1 | 0.7 | 1.7 | 96.2 |
| 1962 - 1963 | 0.0 | 6.1 | 1.1 | 30.8 | 8.1 | 18.3 | 9.5 | 5.5 | 0.0 | 79.4 |
| 1961 - 1962 | 0.0 | 0.0 | 6.5 | 14.0 | 21.4 | 22.9 | 5.6 | 11.2 | 0.0 | 81.6 |
| 1960 - 1961 | 0.0 | 2.4 | 3.7 | 28.6 | 15.0 | 33.1 | 24.7 | 5.1 | 0.0 | 112.6 |
| 1959 - 1960 | 0.0 | 0.0 | 10.2 | 10.9 | 23.4 | 6.3 | 19.8 | 1.8 | 0.0 | 72.4 |
| 1958 - 1959 | 0.0 | 0.0 | 9.8 | 18.0 | 25.6 | 17.6 | 11.3 | 1.6 | 0.0 | 83.9 |
| 1957 - 1958 | 0.0 | 0.5 | 5.8 | 8.3 | 18.4 | 9.0 | 11.8 | 14.2 | 0.2 | 68.2 |
| 1956 - 1957 | 0.0 | 0.0 | 7.8 | 14.5 | 12.7 | 14.8 | 19.7 | 5.1 | 0.0 | 74.6 |
| 1955 - 1956 | 0.0 | 1.1 | 14.3 | 20.6 | 14.7 | 13.9 | 10.5 | 0.1 | 0.0 | 75.2 |
| 1954 - 1955 | 0.0 | 1.1 | 7.3 | 18.9 | 13.3 | 7.7 | 13.2 | 0.3 | 0.0 | 61.8 |
| 1953 - 1954 | 0.0 | 0.0 | 9.4 | 15.8 | 11.8 | 10.1 | 9.6 | 5.3 | 0.0 | 62.0 |
| 1952 - 1953 | 0.0 | 1.5 | 3.7 | 11.5 | 8.0 | 15.8 | 9.0 | 2.9 | 0.1 | 52.5 |
| 1951 - 1952 | 0.0 | 0.0 | 18.0 | 24.1 | 19.7 | 8.4 | 6.9 | 1.0 | 0.0 | 78.1 |
| 1950 - 1951 | 0.0 | 0.0 | 33.6 | 19.5 | 4.7 | 11.0 | 15.2 | 1.7 | 0.0 | 85.7 |