Mailing Address:
Pennsylvania State Climatologist503 Walker Building
University Park, PA 16802
| Year | January | February | March | April | May | June | July | August | September | October | November | December |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean | 12.5 | 10.7 | 8.2 | 1.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 2.8 | 8.3 |
| 2011 | 7.1 | 4.0 | 1.7 | |||||||||
| 2010 | -3.3 | 12.7 | -7.7 | -1.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -2.7 | 0.4 |
| 2009 | 2.9 | -4.2 | -8.0 | -0.7 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 3.3 | -2.6 | 4.5 |
| 2008 | -6.4 | 5.1 | -1.1 | -1.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1.4 | 9.6 | -0.4 |
| 2007 | -3.0 | 5.8 | 5.1 | 1.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -1.2 | 5.0 |
| 2006 | -7.9 | -6.2 | -7.0 | 1.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.4 | -2.6 | -6.9 |
| 2005 | 5.2 | 1.6 | 2.1 | 0.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1.7 | -0.8 | 7.2 |
| 2004 | 8.2 | 5.2 | 2.0 | -0.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -2.8 | -6.5 |
| 2003 | -0.4 | 10.8 | 0.0 | 1.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -1.7 | 11.3 |
| 2002 | -1.3 | -9.4 | -5.5 | 0.8 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1.1 | 1.2 | 8.2 |
| 2001 | -5.0 | -8.1 | 4.6 | -0.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -2.8 | -6.5 |
| 2000 | -1.8 | -6.1 | -8.2 | -0.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -1.7 | 0.2 |
| 1999 | 9.6 | -7.8 | 7.0 | -1.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -2.2 | -7.5 |
| 1998 | -5.6 | -5.8 | -4.4 | -1.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -2.8 | -6.6 |
| 1997 | 2.2 | 0.9 | -3.2 | -0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | 1.0 | 2.1 |
| 1996 | 10.1 | -5.6 | 0.6 | -0.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.3 | -1.7 | -3.8 |
| 1995 | -9.2 | -4.4 | -4.6 | -0.7 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | 11.7 | 12.7 |
| 1994 | 16.2 | 9.2 | 16.9 | -1.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -1.2 | -7.9 |
| 1993 | -10.6 | 9.4 | 20.9 | 0.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.0 | -3.2 |
| 1992 | -6.7 | -8.9 | 9.7 | -0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -2.8 | 9.0 |
| 1991 | -2.1 | -2.7 | -4.3 | -0.7 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -1.7 | -4.0 |
| 1990 | 0.3 | -7.9 | -4.8 | 0.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -2.4 | -1.1 |
| 1989 | -7.0 | -5.3 | -2.8 | -0.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -1.6 | 3.9 |
| 1988 | -7.7 | 0.5 | -3.0 | -0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -2.7 | -4.9 |
| 1987 | 7.0 | -3.9 | -7.0 | 1.8 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | 3.8 | 1.1 |
| 1986 | -3.1 | 8.0 | -6.8 | -0.8 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -0.1 | -7.5 |
| 1985 | 5.8 | 3.5 | -5.1 | 4.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -2.8 | 3.7 |
| 1984 | 0.6 | -2.8 | 10.0 | -1.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -1.5 | -0.6 |
| 1983 | -5.2 | -6.5 | -5.0 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | 3.0 | 0.9 |
| 1982 | 5.0 | 2.4 | 3.0 | 4.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -2.0 | -2.7 |
| 1981 | -4.1 | -5.0 | -8.2 | -1.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -2.2 | -1.8 |
| 1980 | -9.2 | -3.6 | 2.8 | -0.8 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | 5.7 | -1.4 |
| 1979 | -0.4 | 11.9 | -7.2 | -0.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -2.7 | -5.7 |
| 1978 | 25.0 | 0.9 | -0.6 | -1.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | -1.1 | 4.0 |
| 1977 | 5.0 | -1.4 | -0.9 | 0.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1.1 | 2.1 | 12.0 |
| 1976 | 3.8 | -1.3 | -2.7 | -1.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1.6 | 4.0 |
| 1975 | -0.6 | 4.0 | -1.2 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -2.3 | 3.9 |
| 1974 | -2.2 | -3.3 | -2.6 | 2.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -1.9 | 5.5 |
| 1973 | -10.2 | -0.5 | -6.1 | 0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -1.0 | 0.3 |
| 1972 | -8.1 | 22.8 | 2.7 | 0.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.6 | 1.8 | 0.9 |
| 1971 | 2.0 | 7.8 | 14.0 | -0.8 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | 6.5 | -6.4 |
| 1970 | -2.8 | 9.5 | 9.7 | 0.7 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -1.6 | 3.2 |
| 1969 | -8.7 | -4.5 | -5.7 | -1.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.3 | -0.6 | 19.4 |
| 1968 | -6.5 | -5.6 | -1.5 | -1.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 10.9 | -1.6 |
| 1967 | -9.9 | 7.0 | 15.6 | 1.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | 4.2 | 1.8 |
| 1966 | 11.2 | -1.0 | -4.4 | 1.5 | 0.6 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | 1.9 | 0.9 |
| 1965 | -1.5 | -4.9 | 13.2 | 0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | -1.9 | -6.6 |
| 1964 | 11.7 | 9.4 | -5.4 | -0.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -2.7 | -4.7 |
| 1963 | -1.7 | 5.7 | 3.2 | -0.5 | 0.9 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -1.4 | 11.7 |
| 1962 | -6.6 | 2.8 | 9.5 | 1.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 2.1 | -1.3 | 12.5 |
| 1961 | 6.9 | 10.7 | -1.9 | 8.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | 0.1 | -1.1 |
| 1960 | -5.4 | 13.7 | 10.3 | 1.3 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.7 | -2.0 | 11.5 |
| 1959 | -0.3 | -7.3 | 8.1 | 0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -1.8 | -1.0 |
| 1958 | 0.1 | 3.8 | 9.3 | 0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | 3.3 | 0.3 |
| 1957 | -1.4 | -2.0 | 8.0 | 7.4 | 0.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.2 | -1.7 | -2.1 |
| 1956 | -5.2 | 0.6 | 7.7 | 2.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | 0.5 | 0.7 |
| 1955 | -4.1 | 1.9 | -0.6 | -1.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.5 | 4.5 | -1.5 |
| 1954 | -1.5 | -7.4 | -3.1 | -0.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 3.6 | 0.0 |
| 1953 | -3.5 | -1.2 | -0.2 | 3.7 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | 12.9 | -4.3 |
| 1952 | -8.6 | -1.5 | 5.2 | -0.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | -1.6 | -2.2 |
| 1951 | 2.9 | -7.4 | -5.8 | -0.8 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | 3.1 | 12.1 |
| 1950 | -11.0 | -5.3 | 10.9 | -0.4 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | 9.3 | 14.8 |