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 | 15.8 | 12.7 | 11.5 | 3.6 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.4 | 5.1 | 11.0 |
| 2010 | -6.9 | 7.4 | -8.3 | -3.6 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -4.6 | -5.0 |
| 2009 | 2.0 | -8.8 | -11.1 | -3.3 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 3.0 | -4.9 | -0.3 |
| 2008 | -11.2 | 2.7 | -6.4 | -3.5 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.2 | -2.3 | 3.3 |
| 2007 | -7.8 | 5.3 | 0.2 | 5.3 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | 2.1 | 10.2 |
| 2006 | -9.0 | -7.1 | -6.4 | -3.1 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -4.9 | -10.5 |
| 2005 | 8.9 | -1.8 | 11.2 | -2.3 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 2.0 | -3.1 | 5.3 |
| 2004 | 2.2 | -0.4 | -0.9 | -2.8 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -3.9 | -6.6 |
| 2003 | 3.7 | 7.2 | 0.4 | 1.7 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -4.0 | 7.9 |
| 2002 | -4.1 | -9.7 | -7.2 | -3.5 | 0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.2 | 0.0 | 6.0 |
| 2001 | -9.2 | -9.1 | 16.0 | -3.5 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -5.1 | -7.0 |
| 2000 | 2.5 | -2.0 | -10.4 | 0.7 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -2.9 | -0.5 |
| 1999 | 5.5 | -6.2 | 5.9 | -3.6 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -3.7 | -7.5 |
| 1998 | -6.3 | -0.6 | -2.2 | -3.2 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -5.1 | -9.3 |
| 1997 | -1.8 | -3.0 | -4.1 | 0.4 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | 1.1 | 8.3 |
| 1996 | 25.1 | -9.8 | 0.9 | 1.7 | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | 0.1 | 9.2 |
| 1995 | -9.4 | -0.7 | -7.6 | -1.3 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | 12.5 | 14.9 |
| 1994 | 30.0 | 7.0 | 15.7 | -3.3 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -2.6 | -10.2 |
| 1993 | -9.2 | 10.3 | 33.6 | 4.5 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 3.0 | 4.0 | 0.5 |
| 1992 | -6.7 | -2.6 | 8.5 | -1.5 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -2.1 | 5.3 |
| 1991 | -8.7 | -3.5 | -0.9 | -1.1 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -4.1 | -2.0 |
| 1990 | 1.5 | -3.3 | -1.0 | 0.6 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -3.0 | -2.3 |
| 1989 | -11.4 | -5.4 | -7.2 | -3.0 | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -2.1 | 4.2 |
| 1988 | -6.9 | 4.8 | -0.3 | -2.4 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -4.9 | -7.5 |
| 1987 | 24.4 | -5.9 | -9.4 | -1.9 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.3 | 2.5 | 2.8 |
| 1986 | 3.8 | 9.8 | -7.5 | 3.9 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | 9.8 | -6.3 |
| 1985 | -4.8 | -0.5 | -7.1 | -1.1 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -1.2 | 2.1 |
| 1984 | -0.5 | -6.5 | 18.6 | -3.5 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -0.7 | -0.9 |
| 1983 | -1.0 | -2.5 | -2.9 | 17.7 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | 1.9 | -3.8 |
| 1982 | 1.2 | 4.1 | 1.8 | 7.9 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.3 | -3.3 | -3.3 |
| 1981 | -6.6 | -3.7 | -4.6 | -3.6 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -3.6 | 2.5 |
| 1980 | -12.6 | -3.2 | -0.5 | -0.7 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | 6.3 | -2.6 |
| 1979 | -1.6 | 1.1 | -10.6 | -0.5 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.3 | -4.3 | -4.7 |
| 1978 | 21.9 | 9.7 | -4.1 | -2.7 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -1.9 | 3.7 |
| 1977 | 0.6 | -2.7 | 2.6 | -2.0 | 2.5 | 0.0 | 0.0 | 0.0 | 0.0 | 5.4 | 1.5 | 12.5 |
| 1976 | 5.6 | -5.1 | -3.7 | -2.3 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | 2.8 | -4.5 |
| 1975 | -4.5 | -1.7 | -5.6 | -1.9 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -2.8 | -0.7 |
| 1974 | -6.0 | -1.8 | 0.6 | 5.1 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.3 | -1.3 | -1.3 |
| 1973 | -11.8 | -2.7 | -9.5 | -1.5 | 0.9 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -3.7 | 6.3 |
| 1972 | -9.9 | 20.4 | -2.4 | 1.2 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 2.0 | 3.0 | 2.7 |
| 1971 | -3.3 | 4.7 | 12.8 | -2.9 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | 8.4 | -6.5 |
| 1970 | -9.5 | 2.1 | 5.5 | -3.1 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | -5.0 | 5.0 |
| 1969 | -13.3 | -1.1 | -9.9 | -3.6 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.3 | -0.1 | 25.9 |
| 1968 | -9.6 | -9.3 | 5.1 | -3.6 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | 9.0 | -5.4 |
| 1967 | -10.2 | -0.8 | 19.3 | 1.6 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | 6.3 | -1.7 |
| 1966 | 9.5 | -0.3 | -6.6 | -1.8 | 2.3 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -4.0 | 1.3 |
| 1965 | 0.7 | -10.7 | -2.5 | 7.6 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.5 | -3.7 | -9.7 |
| 1964 | 12.7 | 7.3 | -7.0 | -3.0 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -5.1 | -6.2 |
| 1963 | -1.6 | 0.9 | 2.3 | -3.0 | 0.4 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -2.0 | 2.9 |
| 1962 | -10.5 | 3.5 | -4.3 | 0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 3.0 | 0.2 | 6.2 |
| 1961 | 1.5 | 10.2 | -0.6 | 10.4 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -0.7 | -2.2 |
| 1960 | -9.6 | 12.6 | 7.0 | -1.6 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.2 | -5.1 | 6.6 |
| 1959 | -4.9 | -8.0 | 7.3 | -3.6 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -4.3 | 4.3 |
| 1958 | 4.1 | 10.9 | 12.1 | -0.4 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -0.4 | -4.1 |
| 1957 | -3.2 | -5.7 | 2.3 | 10.6 | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | -4.7 | -4.5 |
| 1956 | -7.7 | 0.1 | 10.3 | 8.1 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | -0.9 | -0.9 |
| 1955 | -11.8 | 0.6 | -6.7 | -3.6 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.2 | 2.8 | 1.1 |
| 1954 | -3.2 | -8.0 | -7.8 | -3.0 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | 6.7 | -5.7 |
| 1953 | -7.7 | -1.7 | -5.3 | -1.1 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | 7.4 | -7.9 |
| 1952 | -10.1 | -0.3 | 1.3 | -3.5 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 2.0 | -4.9 | -6.3 |
| 1951 | -6.4 | -7.3 | -2.2 | -3.5 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | 6.1 | 5.4 |
| 1950 | -14.3 | 8.6 | 9.8 | -1.8 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | -0.4 | 4.6 | 8.1 |