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 | 23.5 | 25.9 | 34.7 | 45.4 | 56.4 | 64.3 | 69.0 | 67.4 | 59.6 | 48.7 | 38.9 | 28.5 |
| 2024 | -8.6 | 5.9 | 5.3 | 2.5 | ||||||||
| 2023 | -0.8 | 3.3 | 5.1 | -1.9 | 7.5 | |||||||
| 2023 | 10.4 | 7.1 | -0.3 | 4.7 | -1.2 | -1.4 | 1.9 | -0.8 | 3.3 | 5.1 | -1.9 | 7.5 |
| 2022 | -2.2 | 1.4 | 2.2 | 0.7 | 3.4 | 0.7 | 2.8 | 2.9 | 1.9 | -1.2 | 4.3 | 1.7 |
| 2021 | 2.6 | -1.2 | 3.4 | 1.4 | 0.4 | 2.2 | 0.7 | 2.9 | 3.7 | 7.8 | -0.5 | 6.2 |
| 2020 | 7.0 | 5.0 | 5.5 | -3.6 | -0.2 | 1.2 | 4.5 | 1.9 | -0.8 | 3.2 | 3.9 | 3.2 |
| 2019 | -0.6 | 1.9 | -0.5 | 4.1 | 2.1 | -0.9 | 3.4 | 1.7 | 3.3 | 4.3 | -4.4 | 1.3 |
| 2018 | 2.2 | 6.3 | -3.3 | -6.3 | 5.5 | -0.1 | 2.4 | 3.6 | 4.9 | 4.7 | -2.3 | 1.9 |
| 2017 | 6.8 | 7.0 | -6.5 | 5.4 | 0.3 | -0.1 | 1.6 | -0.6 | 3.0 | 7.0 | 1.6 | -0.5 |
| 2016 | -0.1 | 4.4 | 6.6 | -0.2 | -1.4 | 0.9 | 2.1 | 4.0 | 4.8 | 2.5 | 0.8 | -0.6 |
| 2015 | -3.8 | -11.9 | -6.3 | -0.5 | 5.6 | 0.2 | 0.2 | 0.5 | 6.2 | 1.0 | 6.0 | 13.6 |
| 2014 | -6.3 | -5.4 | -8.0 | 0.3 | 0.5 | 1.9 | -0.6 | -1.6 | 1.9 | 3.1 | -2.3 | 3.3 |
| 2013 | 3.4 | 0.0 | -3.2 | 1.0 | 0.7 | 0.5 | 3.1 | -1.0 | -0.3 | 3.3 | -3.0 | -0.7 |
| 2012 | 4.1 | 6.0 | 9.9 | -0.1 | 5.8 | -0.3 | 3.3 | 0.8 | 0.7 | 3.0 | -2.0 | 5.6 |
| 2011 | -3.1 | -1.3 | -1.4 | 2.3 | 3.0 | 1.7 | 3.0 | 0.1 | 4.1 | 1.9 | 4.1 | 5.7 |
| 2010 | 0.3 | -0.1 | 5.9 | 4.9 | 3.0 | 3.0 | 3.3 | 1.4 | 2.6 | 0.9 | 0.4 | -4.0 |
| 2009 | -5.4 | 1.8 | 1.3 | 3.0 | 0.3 | -0.1 | -2.8 | 1.9 | -0.1 | -2.1 | 4.5 | -1.4 |
| 2008 | 4.2 | 0.6 | -0.6 | 3.6 | -4.3 | 3.2 | 1.3 | -1.2 | 3.0 | -1.9 | -0.8 | 1.0 |
| 2007 | 5.9 | -6.2 | -1.7 | -2.2 | 2.0 | 2.9 | -0.9 | 1.3 | 3.5 | 8.8 | -1.2 | 0.6 |
| 2006 | 8.4 | 1.0 | -0.8 | 1.8 | -0.8 | 1.2 | 3.2 | 1.0 | -1.0 | -0.7 | 4.6 | 7.8 |
| 2005 | -1.5 | 2.0 | -4.7 | 2.7 | -3.9 | 5.3 | 3.0 | 4.3 | 4.9 | 2.4 | 2.3 | -3.5 |
| 2004 | -6.8 | -1.4 | 1.7 | 1.0 | 5.3 | -1.6 | -1.6 | -0.3 | 3.1 | -0.5 | 1.8 | -0.2 |
| 2003 | -5.4 | -3.6 | -0.4 | -0.7 | -1.8 | -2.1 | 1.0 | 3.6 | 1.6 | -2.2 | 6.5 | 0.6 |
| 2002 | 7.3 | 6.0 | 1.9 | 2.6 | -2.9 | 1.5 | 1.9 | 3.3 | 3.5 | -1.5 | -1.2 | -1.5 |
| 2001 | 0.3 | 1.7 | -3.6 | 0.7 | 0.6 | 1.1 | -3.2 | 2.9 | -0.5 | 1.4 | 4.4 | 6.3 |
| 2000 | -0.7 | 1.2 | 5.6 | -0.1 | 0.8 | 0.0 | -3.9 | -1.8 | -1.0 | 0.5 | -1.9 | -6.6 |
| 1999 | 1.2 | 3.1 | -1.5 | 0.0 | 0.6 | 1.8 | 3.8 | -0.1 | 2.7 | -2.0 | 3.9 | 2.3 |
| 1998 | 7.5 | 6.1 | 2.1 | 1.1 | 4.1 | -1.2 | -1.3 | 0.9 | 2.1 | 1.3 | 0.1 | 5.9 |
| 1997 | -0.4 | 4.9 | -0.2 | -2.5 | -4.3 | 0.1 | -0.5 | -1.4 | -1.5 | -0.8 | -3.9 | 0.7 |
| 1996 | -1.2 | -1.0 | -3.9 | 0.3 | -1.1 | 2.1 | -1.4 | 1.6 | 1.7 | 0.2 | -4.2 | 4.1 |
| 1995 | 7.0 | -3.9 | 3.6 | -0.2 | -0.7 | 3.2 | 3.0 | 3.0 | 0.0 | 5.0 | -4.8 | -5.3 |
| 1994 | -8.4 | -3.9 | -3.1 | 3.2 | -0.8 | 3.5 | 3.9 | -0.9 | 0.2 | 0.2 | 5.6 | 5.4 |
| 1993 | 5.0 | -5.9 | -4.5 | 0.7 | 1.5 | 0.4 | 2.6 | 1.8 | -0.4 | -1.5 | -0.7 | -1.8 |
| 1992 | 3.3 | 2.4 | -2.9 | -1.2 | -1.3 | -1.5 | -1.5 | -2.7 | -0.1 | -3.1 | -0.6 | 0.2 |
| 1991 | 0.2 | 4.0 | 2.3 | 2.7 | 5.4 | 1.5 | 0.3 | 1.4 | -1.2 | 1.7 | 0.7 | 2.7 |
| 1990 | 8.7 | 4.2 | 2.8 | 1.1 | -2.6 | 0.7 | 0.4 | 0.0 | -0.9 | 4.3 | 1.7 | 4.5 |
| 1989 | 4.8 | -1.0 | -0.6 | -3.1 | -1.4 | -0.6 | -1.5 | -2.3 | 0.4 | 1.0 | -1.2 | -13.4 |
| 1988 | -4.4 | -1.5 | 0.1 | -1.6 | 0.2 | -1.7 | 2.8 | 2.1 | -2.5 | -5.6 | 1.6 | -1.8 |
| 1987 | -1.4 | -3.2 | 0.5 | 0.7 | -0.7 | 0.8 | 0.7 | -3.2 | -1.3 | -4.2 | 0.2 | 1.9 |
| 1986 | 1.1 | -2.3 | 1.2 | 0.4 | 2.5 | -2.2 | -1.6 | -3.1 | -2.2 | -0.4 | -4.6 | -0.1 |
| 1985 | -3.3 | 1.9 | 2.7 | 3.5 | 2.1 | -2.7 | -0.9 | -0.6 | 1.9 | 1.6 | 2.5 | -4.5 |
| 1984 | -3.1 | 6.8 | -6.8 | -1.6 | -2.9 | 1.2 | -2.0 | 1.9 | -3.0 | 4.1 | -0.6 | 6.3 |
| 1983 | 2.0 | 2.1 | 2.9 | -1.9 | -2.7 | 0.3 | 0.5 | 2.1 | 1.6 | 0.7 | 0.9 | -3.8 |
| 1982 | -7.0 | 0.2 | -1.9 | -2.2 | 2.0 | -2.5 | -0.4 | -3.4 | 0.5 | 0.9 | 3.0 | 6.3 |
| 1981 | -6.4 | 6.1 | -1.3 | 3.0 | 0.7 | 0.8 | 0.5 | -0.4 | -0.1 | -2.8 | 0.5 | -2.1 |
| 1980 | 1.9 | -4.3 | -2.5 | 1.5 | 1.9 | -2.5 | 1.0 | 3.7 | 2.6 | -2.4 | -4.0 | -5.0 |
| 1979 | -0.2 | -10.0 | 3.7 | 0.5 | 0.9 | -1.6 | -0.2 | 0.3 | 0.3 | -0.2 | 4.2 | 3.3 |
| 1978 | -2.5 | -8.6 | -3.9 | -1.5 | -0.8 | -0.9 | -1.8 | 2.2 | -1.1 | -1.2 | 0.6 | -0.1 |
| 1977 | -9.7 | -0.1 | 3.9 | 2.1 | 2.2 | -2.1 | 0.2 | -0.2 | 1.6 | -1.4 | 2.2 | -2.9 |
| 1976 | -4.8 | 6.2 | 3.4 | 2.8 | -2.7 | 3.0 | -2.8 | -1.2 | -1.6 | -3.3 | -5.5 | -6.9 |
| 1975 | 4.3 | 2.2 | -2.3 | -5.4 | 3.8 | 0.6 | 0.4 | 0.0 | -3.5 | 3.7 | 5.2 | -0.4 |
| 1974 | 3.5 | -1.7 | -0.7 | 2.9 | -1.9 | -1.0 | -0.6 | -0.3 | -0.9 | -2.9 | 1.7 | 2.7 |
| 1973 | 4.8 | -1.8 | 6.3 | 1.7 | -4.1 | 2.9 | 0.9 | 2.2 | 0.7 | 2.9 | 1.7 | 1.9 |
| 1972 | 3.3 | -3.4 | -3.2 | -3.6 | 1.1 | -2.8 | 0.8 | -0.7 | 1.2 | -4.0 | -3.2 | 3.0 |
| 1971 | -4.8 | -0.4 | -3.2 | -2.8 | -2.8 | 1.6 | -1.5 | -1.4 | 4.0 | 6.2 | -1.3 | 3.9 |
| 1970 | -6.8 | -2.1 | -4.8 | -0.6 | 2.0 | -1.3 | 0.4 | 0.6 | 2.6 | 2.8 | 2.2 | -1.5 |
| 1969 | -0.6 | -0.8 | -2.9 | 2.0 | -0.1 | 0.5 | -1.1 | 0.2 | 0.9 | -0.4 | -1.5 | -4.2 |
| 1968 | -5.4 | -4.3 | 2.7 | 3.7 | -3.7 | -0.7 | 1.2 | 0.4 | 1.8 | 2.4 | -0.2 | -3.1 |
| 1967 | 5.5 | -4.8 | -3.5 | 0.1 | -7.5 | 2.8 | -0.6 | -1.4 | -1.0 | -0.1 | -4.6 | 1.1 |
| 1966 | -1.6 | -1.1 | 0.6 | -3.2 | -4.1 | 1.4 | 1.5 | 0.6 | -2.6 | -1.5 | 1.8 | -0.7 |
| 1965 | -3.2 | -1.5 | -3.3 | -3.4 | 3.5 | -1.6 | -2.1 | -1.1 | 1.6 | -2.4 | -1.2 | 2.1 |
| 1964 | 1.8 | -3.8 | 0.5 | -1.9 | 1.8 | -1.0 | 1.4 | -3.2 | 0.8 | -2.6 | 2.1 | -0.2 |
| 1963 | -3.4 | -9.1 | 0.1 | 0.0 | -2.2 | -0.1 | 0.0 | -3.1 | -3.3 | 4.9 | 4.1 | -6.4 |
| 1962 | -0.5 | -2.6 | -0.9 | 0.5 | 2.5 | 1.8 | -2.4 | -1.1 | -3.5 | 0.7 | -3.7 | -5.9 |
| 1961 | -5.8 | 1.2 | -0.9 | -4.0 | -2.7 | 1.8 | 0.7 | 1.0 | 7.5 | 3.8 | 0.8 | -1.1 |
| 1960 | 3.4 | 2.3 | -11.6 | 4.5 | -1.1 | 0.3 | -2.2 | 1.0 | 1.8 | 0.4 | 1.7 | -7.8 |
| 1959 | -0.6 | -2.0 | -1.6 | 2.3 | 3.1 | 1.4 | 1.2 | 3.1 | 5.0 | 3.7 | -1.6 | 2.2 |
| 1958 | -0.1 | -7.7 | -2.4 | 0.9 | -2.9 | -4.5 | 0.8 | -0.5 | -0.4 | -1.0 | 0.7 | -8.6 |
| 1957 | -4.0 | 3.3 | -0.5 | 1.9 | -0.6 | 3.3 | -0.8 | -3.1 | 1.3 | -1.8 | 1.0 | 3.6 |
| 1956 | 0.4 | 1.4 | -5.4 | -3.7 | -4.4 | 0.9 | -3.6 | -2.1 | -3.5 | 1.0 | -0.4 | 3.9 |
| 1955 | -1.8 | -0.3 | -0.3 | 3.6 | 2.1 | -1.5 | 5.3 | 3.7 | -0.8 | 3.1 | -2.8 | -6.4 |
| 1954 | -1.4 | 6.1 | -0.9 | 2.7 | -3.0 | 1.5 | -1.0 | -2.1 | 0.4 | 3.8 | -1.6 | -1.8 |
| 1953 | 6.0 | 4.2 | 1.1 | -1.0 | 2.1 | 1.5 | 1.1 | 0.0 | 1.2 | 3.3 | 1.8 | 4.6 |
| 1952 | 4.0 | 2.1 | -2.1 | 2.4 | -2.6 | 2.5 | 3.0 | -0.4 | 1.2 | -3.0 | 1.1 | 1.7 |
| 1951 | 4.9 | 2.8 | -0.1 | 1.0 | 1.4 | 0.4 | 0.8 | 0.2 | 0.5 | 3.1 | -4.9 | 0.3 |
| 1950 | 10.6 | -1.0 | -5.7 | -3.6 | -0.2 | -0.2 | -1.2 | 0.2 | -1.8 | 4.1 | 1.4 | -3.1 |
| 1949 | 8.9 | 6.2 | 2.8 | 2.3 | 1.0 | 5.0 | 5.1 | 3.2 | -1.4 | 6.3 | -0.8 | 1.5 |
| 1948 | -5.4 | -1.8 | 1.8 | 2.3 | -0.2 | 0.4 | 1.3 | 1.2 | 2.4 | -0.1 | 6.1 | 1.4 |
| 1947 | 7.3 | -3.3 | -3.7 | 0.0 | -0.1 | -0.5 | -0.5 | 3.7 | 1.7 | 8.2 | -2.4 | -0.8 |
| 1946 | 3.7 | -0.3 | 10.4 | 0.8 | 0.4 | -0.4 | 0.7 | -3.1 | 2.6 | 5.8 | 4.6 | 2.7 |
| 1945 | -5.7 | 0.6 | 11.0 | 5.2 | -2.8 | -0.2 | -0.2 | -0.5 | 3.6 | -0.1 | 1.4 | -4.0 |
| 1944 | 4.8 | 0.5 | -3.2 | -2.5 | 6.5 | 2.4 | 2.0 | 2.6 | 1.7 | -0.4 | -0.1 | -3.1 |
| 1943 | 0.9 | 0.4 | -0.7 | -5.5 | 2.1 | 6.3 | 1.9 | 1.3 | -0.4 | -0.1 | -1.9 | -2.8 |
| 1942 | -0.6 | -3.9 | 2.1 | 4.2 | 3.3 | 1.4 | 0.7 | -1.7 | -0.4 | 1.3 | -0.5 | -4.6 |
| 1941 | -0.9 | -3.5 | -7.4 | 5.9 | 0.7 | 0.6 | 1.3 | -2.8 | 1.8 | 4.3 | 2.5 | 2.8 |
| 1940 | -6.5 | -1.4 | -7.3 | -4.8 | -0.5 | -1.7 | -0.4 | -2.6 | -1.4 | -3.2 | -1.5 | 2.3 |
| 1939 | 1.3 | 3.1 | -1.4 | -2.3 | 3.5 | 1.0 | 0.9 | 3.6 | 2.4 | 0.9 | -3.3 | 1.9 |
| 1938 | -0.1 | 1.2 | 2.2 | 1.8 | -2.4 | -0.2 | 0.8 | 2.5 | -2.3 | 4.0 | 1.2 | 0.2 |
| 1937 | 8.4 | 0.8 | -6.4 | -2.2 | 1.1 | 1.5 | 0.1 | 2.9 | -2.2 | -2.2 | -1.9 | -2.4 |
| 1936 | -5.0 | -8.3 | 4.3 | -3.0 | 1.7 | -0.3 | 0.4 | 1.0 | 1.5 | 0.6 | -5.0 | 2.1 |
| 1935 | -1.9 | -2.3 | 1.7 | -3.0 | -4.9 | -0.6 | 1.6 | -0.6 | -2.7 | -0.1 | 1.0 | -6.7 |
| 1934 | 3.5 | -14.2 | -4.4 | -1.4 | 1.4 | 3.3 | 0.9 | -4.1 | 2.0 | -2.2 | 1.7 | -2.3 |
| 1933 | 8.7 | -0.3 | -3.4 | 0.2 | 1.6 | 1.9 | -0.7 | -1.1 | 0.9 | -1.3 | -6.2 | -2.3 |
| 1932 | 11.7 | 2.7 | -6.1 | -4.6 | -0.7 | -1.6 | -2.8 | -0.7 | -0.1 | 0.7 | -4.4 | 0.8 |
| 1931 | 1.0 | -0.3 | -2.2 | -1.2 | -0.4 | 0.4 | 2.1 | -0.2 | 4.8 | 3.2 | 6.4 | 4.3 |
| 1930 | 1.8 | 2.7 | -0.9 | -3.0 | 1.4 | 1.9 | -0.8 | -1.4 | 2.6 | -1.8 | -0.7 | -1.4 |
| 1929 | 0.3 | -1.0 | 4.7 | 0.6 | -1.0 | 0.8 | -1.1 | -2.9 | 0.7 | -2.1 | -1.0 | -0.4 |
| 1928 | 2.6 | -0.3 | -2.5 | -3.7 | -2.2 | -3.0 | 0.3 | 2.3 | -4.0 | 2.2 | 0.4 | 2.9 |
| 1927 | -0.7 | 3.8 | 2.5 | -2.8 | -2.5 | -3.6 | -1.3 | -5.2 | -0.3 | 2.9 | 3.0 | 1.0 |
| 1926 | 0.7 | -3.1 | -6.3 | -4.9 | -1.7 | -5.0 | -1.2 | 0.0 | -2.5 | -1.3 | -2.8 | -5.9 |
| 1925 | -3.5 | 5.0 | 2.9 | 0.8 | -4.1 | 3.7 | -2.7 | -1.5 | 0.6 | -6.5 | -3.3 | -0.4 |
| 1924 | 1.8 | -4.6 | -2.2 | -3.2 | -4.6 | -2.2 | -2.3 | -1.0 | -4.5 | 0.4 | -2.0 | -2.0 |
| 1923 | -0.7 | -6.3 | -3.2 | -1.2 | -1.9 | 2.7 | -2.2 | -2.0 | 0.3 | -0.8 | -2.0 | 7.0 |
| 1922 | -2.8 | 1.8 | 0.5 | 0.2 | 2.5 | 1.9 | -0.8 | -1.8 | 1.0 | 2.1 | -0.1 | -1.4 |
| 1921 | 2.7 | 1.8 | 9.4 | 6.3 | -0.4 | 1.5 | 3.5 | -2.6 | 3.6 | -0.1 | -1.3 | -1.4 |
| 1920 | -7.1 | -4.9 | -1.1 | -3.4 | -3.4 | -0.9 | -2.9 | 0.4 | 0.3 | 5.2 | -2.7 | 1.6 |
| 1919 | 4.2 | 1.4 | 2.6 | -1.9 | 0.0 | 2.5 | -0.1 | -2.8 | -0.1 | 4.5 | -1.6 | -6.6 |
| 1918 | -9.8 | -3.2 | 1.3 | -1.2 | 4.9 | -3.4 | -1.7 | 1.5 | -5.0 | 3.0 | -0.6 | 3.3 |
| 1917 | 1.0 | -4.5 | -2.5 | -1.7 | -6.9 | -1.0 | 0.9 | 1.2 | -5.2 | -4.2 | -5.7 | -10.2 |
| 1916 | 5.7 | -4.8 | -10.5 | -1.9 | 0.4 | -4.9 | 1.3 | 0.8 | -1.1 | 0.6 | -1.9 | -1.7 |
| 1915 | 2.2 | 2.2 | -5.4 | 3.9 | -4.4 | -2.1 | -1.9 | -2.0 | 1.7 | 1.6 | -1.5 | -2.7 |
| 1914 | 0.8 | -8.2 | -5.5 | -3.4 | 2.1 | -1.3 | -2.7 | -0.3 | -2.8 | 3.7 | -3.3 | -4.1 |
| 1913 | 8.8 | -2.4 | 4.4 | 1.4 | -1.6 | -0.4 | -0.7 | -1.1 | -2.5 | 3.3 | 1.0 | 2.7 |
| 1912 | -8.4 | -5.6 | -5.2 | -0.3 | 1.3 | -2.4 | -0.6 | -3.9 | -1.0 | 2.1 | 0.2 | 2.7 |
| 1911 | 2.9 | -1.7 | -4.2 | -3.7 | 5.6 | -0.6 | 1.5 | -0.1 | -1.2 | -0.6 | -5.2 | 4.2 |
| 1910 | -0.2 | -2.9 | 4.9 | 3.1 | -2.2 | -2.5 | 0.9 | -2.2 | -0.2 | 2.9 | -6.3 | -8.1 |
| 1909 | 2.9 | 5.1 | -3.7 | -1.4 | -0.8 | 0.9 | -2.8 | -2.5 | -2.1 | -3.5 | 2.3 | -4.2 |
| 1908 | 1.1 | -6.3 | 0.5 | -0.5 | 0.6 | 0.9 | 1.5 | -2.0 | 0.6 | 2.7 | -1.8 | -0.7 |
| 1907 | 1.1 | -8.7 | 0.8 | -5.5 | -5.4 | -3.5 | -0.6 | -2.6 | 0.0 | -3.8 | -3.6 | 1.3 |
| 1906 | 6.9 | -1.7 | -7.3 | 0.1 | -0.3 | 1.5 | -0.7 | 2.3 | 1.7 | 0.3 | -2.1 | -2.3 |
| 1905 | -3.2 | -9.0 | -1.6 | -0.7 | 0.7 | -0.6 | 0.8 | -2.5 | -0.9 | 0.9 | -4.0 | 1.9 |
| 1904 | -7.5 | -8.4 | -4.4 | -4.3 | 2.8 | 0.1 | -1.6 | -2.0 | -2.3 | -2.0 | -5.2 | -7.3 |
| 1903 | 0.0 | 1.0 | 8.0 | -0.3 | 1.6 | -5.0 | -1.6 | -5.5 | -1.2 | 1.5 | -6.0 | -5.6 |
| 1902 | -1.9 | -5.1 | 3.5 | -0.5 | -1.2 | -2.9 | -1.5 | -2.9 | -2.1 | 1.6 | 4.2 | -3.9 |
| 1901 | 1.1 | -7.7 | -2.3 | -1.8 | -1.2 | 1.3 | 3.1 | 1.0 | -0.2 | 0.4 | -7.8 | -2.2 |
| 1900 | 2.6 | -2.1 | -7.8 | -0.3 | -0.5 | 1.8 | 1.5 | 3.7 | 3.1 | 6.7 | 0.6 | -0.4 |
| 1899 | -0.9 | -6.2 | -2.9 | 0.3 | 0.6 | 3.4 | 0.3 | 0.3 | -2.5 | 2.8 | -1.4 | 0.6 |