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 | 3.55 | 2.69 | 3.74 | 3.64 | 4.71 | 4.35 | 4.30 | 4.13 | 4.55 | 3.59 | 3.77 | 3.53 |
| 2024 | -1.03 | -0.07 | 0.52 | |||||||||
| 2023 | -1.94 | -0.61 | -1.37 | -1.74 | 3.89 | |||||||
| 2023 | -0.71 | -2.23 | -1.86 | -1.71 | -1.89 | -1.75 | -0.71 | -1.94 | -0.61 | -1.37 | -1.74 | 3.89 |
| 2022 | -2.51 | 0.06 | -2.24 | 0.66 | -2.01 | -1.29 | -3.21 | -2.20 | -2.30 | -1.08 | -1.86 | 0.12 |
| 2021 | -2.55 | -0.35 | -0.57 | -2.40 | -1.44 | -3.06 | -1.72 | 1.14 | 1.31 | -0.98 | -2.50 | -2.83 |
| 2020 | -2.28 | -0.64 | -1.73 | -0.74 | -1.83 | -2.03 | -2.22 | 0.52 | -0.79 | -1.88 | -1.02 | -0.02 |
| 2019 | 1.04 | -0.78 | -1.98 | 0.33 | 1.39 | -0.37 | 0.44 | -1.63 | -3.37 | 0.96 | -2.34 | -1.90 |
| 2018 | -1.01 | 0.61 | -1.93 | -1.58 | -2.28 | -2.25 | -0.27 | 0.47 | -1.16 | -1.75 | -0.50 | -0.35 |
| 2017 | -1.88 | -1.67 | -2.15 | -2.49 | -2.95 | -2.20 | -1.01 | 1.07 | -2.39 | -1.71 | -3.07 | -3.10 |
| 2016 | -0.94 | 1.70 | -3.07 | -1.73 | -1.71 | -1.62 | 0.75 | -1.43 | -2.55 | -2.89 | -2.44 | -1.90 |
| 2015 | -1.91 | -1.22 | -1.11 | -1.09 | -3.95 | -0.08 | 0.70 | -0.61 | -0.65 | -0.57 | -2.27 | -0.42 |
| 2014 | 14.57 | 0.90 | -2.14 | 0.57 | -0.09 | 0.18 | 0.75 | -1.82 | -3.61 | 1.44 | -1.38 | -0.84 |
| 2013 | -0.71 | -1.05 | -1.12 | -0.73 | -2.46 | 1.93 | -0.69 | 1.36 | -2.55 | -1.31 | -0.60 | 0.82 |
| 2012 | -0.50 | -1.77 | -2.45 | -1.69 | 2.67 | -0.24 | -1.42 | -1.44 | 1.97 | 1.72 | -2.45 | 1.28 |
| 2011 | -1.23 | 0.31 | 3.21 | 3.35 | 0.86 | -0.56 | -0.37 | 7.20 | 9.60 | 1.13 | 0.91 | 0.32 |
| 2010 | -0.99 | 0.71 | 1.82 | -0.23 | -1.00 | -1.94 | 2.19 | -2.43 | 1.38 | 2.27 | -0.32 | -1.30 |
| 2009 | -1.19 | -2.04 | -2.02 | -0.78 | 0.68 | 3.12 | 2.35 | 2.88 | -1.20 | 1.81 | -2.35 | 2.78 |
| 2008 | -2.21 | 4.73 | 1.41 | -0.87 | -1.06 | -1.26 | 0.71 | -1.92 | 2.82 | 0.15 | -1.69 | 3.74 |
| 2007 | -0.74 | -0.05 | 0.10 | 2.19 | -2.88 | 1.47 | 0.56 | 1.49 | -3.60 | 2.21 | 0.66 | 1.75 |
| 2006 | 1.68 | -0.45 | -2.84 | -0.28 | -2.25 | 6.60 | 2.23 | -0.57 | 1.33 | 1.12 | 1.08 | -1.26 |
| 2005 | 1.96 | 0.03 | 0.94 | 2.69 | -2.91 | -1.33 | 0.09 | -1.88 | -2.92 | 8.76 | -0.19 | 0.52 |
| 2004 | -1.38 | -0.07 | -1.63 | 0.16 | -0.60 | -0.85 | 4.11 | 2.47 | 5.09 | -0.57 | 1.76 | 0.54 |
| 2003 | -1.65 | 0.41 | 0.23 | -1.02 | -1.10 | 4.82 | 1.81 | 0.94 | 6.44 | 1.52 | -0.07 | 1.44 |
| 2002 | -1.85 | -2.15 | 0.06 | 1.36 | 0.49 | 0.48 | -3.58 | -1.39 | -0.22 | 4.43 | 0.19 | 1.28 |
| 2001 | -0.89 | -0.42 | 0.62 | -1.66 | -0.54 | 0.18 | -0.13 | 0.21 | 0.43 | -2.53 | -2.32 | -1.11 |
| 2000 | -0.73 | -0.58 | 2.07 | -0.49 | 0.51 | 0.98 | -0.35 | 0.29 | -1.28 | -1.92 | -1.07 | 0.80 |
| 1999 | 2.44 | -0.18 | -0.36 | -0.96 | -2.09 | -2.62 | -2.85 | -0.86 | 7.46 | -0.97 | -0.70 | -0.93 |
| 1998 | 1.02 | 1.38 | 0.58 | 2.01 | 0.00 | 2.47 | -2.28 | -0.16 | -1.73 | 1.05 | -2.17 | -2.94 |
| 1997 | -0.41 | -1.19 | 0.13 | -1.95 | -2.09 | -1.76 | 1.75 | 1.34 | -0.94 | -1.71 | -1.04 | -0.81 |
| 1996 | 3.53 | -0.50 | -0.11 | 2.14 | -1.75 | 0.85 | 3.70 | -2.10 | -0.25 | 3.48 | 1.16 | 4.48 |
| 1995 | 0.09 | -0.44 | -0.87 | -1.25 | -1.61 | -2.07 | 1.60 | -2.76 | -1.86 | 4.11 | 0.28 | -1.30 |
| 1994 | 2.14 | 0.32 | 2.32 | -0.39 | -1.86 | 1.07 | -0.51 | 1.74 | -1.01 | -2.45 | 1.22 | -0.76 |
| 1993 | -1.34 | 0.71 | 3.94 | 3.53 | -2.79 | -1.55 | -0.90 | -0.60 | 2.87 | -0.84 | 0.38 | 0.22 |
| 1992 | -1.61 | -1.09 | 0.25 | -1.69 | 0.75 | -1.31 | 1.04 | -1.56 | -0.81 | -1.31 | 0.89 | -0.07 |
| 1991 | -0.92 | -1.12 | 0.40 | -0.82 | -1.85 | -2.68 | -0.92 | -0.82 | -1.48 | -0.45 | -0.67 | -0.25 |
| 1990 | 1.36 | -0.11 | -1.86 | -0.79 | 3.01 | -1.99 | -0.80 | 2.88 | -2.00 | 1.09 | -0.50 | 3.17 |
| 1989 | -2.15 | -0.51 | -0.82 | -2.21 | 5.26 | 1.76 | 0.11 | -1.93 | 0.72 | 1.23 | -1.21 | -2.22 |
| 1988 | -1.12 | 0.58 | -1.55 | -2.22 | 2.23 | -2.87 | 2.80 | -0.72 | -0.91 | -1.33 | 0.74 | -2.66 |
| 1987 | -0.79 | -1.87 | -1.52 | 1.04 | -2.33 | -0.66 | 2.23 | 1.13 | 5.91 | -0.90 | 0.17 | -2.14 |
| 1986 | 0.66 | 1.30 | -0.85 | 0.70 | -1.97 | -0.90 | 0.56 | 1.25 | -0.83 | -1.27 | 2.85 | 1.09 |
| 1985 | -2.54 | -0.68 | -2.25 | -2.70 | 0.63 | -0.01 | 1.43 | -0.97 | 3.23 | -2.14 | 4.09 | -1.52 |
| 1984 | -2.28 | 0.98 | -0.44 | 1.30 | 5.06 | -0.26 | 3.91 | -1.36 | -3.73 | -0.41 | -2.33 | -0.72 |
| 1983 | -0.16 | 0.50 | 1.26 | 6.17 | -0.66 | 1.90 | -2.66 | -1.22 | -2.86 | 1.01 | 2.52 | 5.09 |
| 1982 | 0.54 | 0.27 | -1.03 | 1.30 | -0.34 | 2.82 | -1.02 | 2.67 | -1.95 | -1.77 | -0.85 | -1.85 |
| 1981 | -3.04 | 3.42 | -2.83 | -0.11 | -0.10 | 1.07 | -0.60 | 0.15 | -0.79 | -0.09 | -1.74 | -0.24 |
| 1980 | -2.78 | -1.84 | 1.96 | 1.16 | -1.20 | -1.77 | -2.12 | -3.13 | -2.96 | -0.51 | -0.83 | -2.86 |
| 1979 | 5.61 | 1.18 | -1.75 | 0.49 | 1.19 | -2.25 | 0.50 | -1.05 | 1.86 | 1.75 | -0.32 | -1.30 |
| 1978 | 4.52 | -1.44 | 0.59 | -1.85 | 1.87 | -1.41 | -0.57 | 4.13 | -1.48 | -1.15 | -1.63 | 0.14 |
| 1977 | -2.23 | -0.30 | 3.93 | 1.25 | -3.00 | 0.56 | -0.50 | 0.90 | 0.47 | 2.21 | 1.87 | 2.33 |
| 1976 | 2.42 | -0.02 | -1.13 | -1.23 | 0.38 | 0.56 | -0.15 | 0.21 | 0.93 | 4.80 | -3.03 | -0.98 |
| 1975 | 1.51 | 0.87 | 0.26 | -0.87 | 0.42 | 3.06 | 3.27 | 0.69 | 3.52 | 1.17 | 0.55 | -0.80 |
| 1974 | 0.30 | -0.38 | 1.17 | 0.29 | -0.65 | -0.08 | -0.54 | 2.15 | 1.72 | -2.27 | -1.56 | 1.38 |
| 1973 | 0.17 | -0.17 | -1.11 | 1.63 | 0.62 | 2.00 | -2.09 | -0.85 | 1.40 | -1.19 | -2.09 | 4.26 |
| 1972 | -0.43 | 1.01 | -0.29 | -0.61 | 1.61 | 7.07 | -0.65 | -1.37 | -3.05 | -0.43 | 5.23 | 2.78 |
| 1971 | -1.15 | 2.44 | -0.76 | -2.45 | 0.79 | -2.52 | 0.37 | 3.05 | -0.28 | -0.56 | 1.99 | -1.47 |
| 1970 | -2.96 | 0.03 | -0.59 | 0.82 | -1.71 | -0.83 | 1.17 | -1.71 | -1.99 | 2.34 | 2.12 | -1.08 |
| 1969 | -2.27 | -1.76 | -1.41 | 0.32 | -1.81 | -0.37 | 4.96 | -0.58 | -1.23 | -1.53 | 0.25 | 1.74 |
| 1968 | -1.42 | -1.99 | -0.33 | -0.79 | 1.67 | -0.16 | -2.52 | -0.69 | 0.26 | -0.40 | 0.17 | -0.16 |
| 1967 | -2.12 | -1.31 | 1.83 | -1.09 | 0.00 | -1.74 | 1.01 | 1.36 | -2.19 | -0.20 | -0.65 | 0.52 |
| 1966 | -0.35 | 0.64 | -1.81 | -0.38 | -2.29 | -3.58 | -1.34 | -1.24 | -0.19 | -0.89 | 0.09 | -0.31 |
| 1965 | -1.37 | 0.51 | -1.26 | -1.65 | -3.29 | -2.79 | -2.35 | 1.47 | -1.57 | 0.66 | -1.99 | -1.80 |
| 1964 | 1.19 | 0.14 | -1.47 | 2.44 | -3.68 | -0.68 | -1.47 | -2.69 | -2.40 | -2.18 | -1.59 | 0.50 |
| 1963 | -0.87 | -0.38 | 0.20 | -2.14 | -2.03 | -2.07 | -0.84 | -1.30 | -0.69 | -3.45 | 2.83 | -1.32 |
| 1962 | -0.50 | 1.82 | -0.65 | -0.14 | -3.03 | -0.96 | -1.96 | 1.12 | 0.75 | 0.19 | 0.22 | -0.66 |
| 1961 | -0.77 | 0.43 | 0.44 | 0.69 | -1.72 | -1.36 | 3.49 | 0.00 | -2.66 | -2.65 | 0.23 | -0.05 |
| 1960 | 0.43 | 1.09 | -0.96 | 0.22 | -0.36 | -0.41 | 2.11 | 2.46 | 3.69 | -2.44 | -1.30 | -1.76 |
| 1959 | -0.90 | -0.30 | -0.56 | -0.17 | -3.42 | -0.52 | 1.38 | 2.35 | -1.15 | 0.93 | -0.60 | 0.54 |
| 1958 | 0.53 | 1.83 | 0.36 | 2.04 | -0.91 | -1.47 | 0.74 | -1.51 | 1.13 | 0.60 | -0.53 | -2.57 |
| 1957 | -1.78 | -0.35 | -1.28 | 2.95 | -2.53 | -0.34 | -2.97 | -2.97 | -1.84 | -0.35 | 0.05 | 3.14 |
| 1956 | -2.00 | 1.80 | 0.42 | 0.33 | -1.36 | 0.52 | 2.01 | -0.30 | -0.21 | -0.66 | -1.04 | 0.82 |
| 1955 | -2.84 | 0.19 | 0.43 | -0.72 | -1.99 | -1.04 | -3.24 | 8.90 | -1.81 | 4.17 | -1.33 | -3.20 |
| 1954 | -1.79 | -0.17 | 0.46 | -0.30 | -0.47 | -2.41 | -2.74 | 1.99 | -1.73 | -0.71 | 0.67 | -0.20 |
| 1953 | 1.99 | 0.40 | 1.98 | 2.01 | 2.13 | -1.82 | -0.13 | -2.61 | -0.33 | -0.36 | -1.10 | 1.58 |
| 1952 | 1.05 | -0.67 | 1.80 | 4.94 | 1.16 | -2.75 | 3.85 | 1.41 | 1.86 | -2.47 | 3.38 | 1.82 |
| 1951 | 0.71 | 1.12 | 1.28 | 0.00 | -1.85 | 0.87 | 3.09 | -1.06 | -1.35 | 0.20 | 3.13 | 2.12 |
| 1950 | -0.32 | 1.18 | 1.39 | -1.42 | -0.27 | -1.70 | 0.49 | -1.33 | -0.98 | -0.95 | 2.39 | 2.06 |
| 1949 | 1.68 | 0.03 | -2.38 | 0.97 | -0.61 | -3.19 | -0.17 | 0.48 | 0.31 | -1.09 | -2.28 | 0.12 |
| 1948 | -0.31 | -0.88 | -0.16 | 0.92 | 2.97 | 0.51 | -0.78 | 0.75 | -2.86 | -1.60 | 1.53 | 1.58 |
| 1947 | 0.45 | -1.14 | -0.48 | 0.95 | 3.78 | 0.18 | 6.43 | -1.56 | -1.60 | -1.57 | 1.62 | -1.88 |
| 1946 | -1.88 | -0.52 | -0.03 | -2.74 | 3.52 | 0.54 | 1.12 | 0.16 | -0.59 | -0.54 | -2.83 | -1.28 |
| 1945 | -0.43 | -0.36 | -0.98 | 0.65 | 0.56 | 0.11 | 5.59 | 0.19 | 1.63 | -1.02 | 1.31 | 0.47 |
| 1944 | -0.93 | -0.59 | 1.10 | 0.37 | -2.33 | 0.45 | -2.14 | -2.39 | 0.08 | -1.62 | 0.06 | -0.39 |
| 1943 | -0.75 | -0.61 | -1.19 | -0.47 | 1.04 | 0.29 | -1.29 | -0.58 | -4.19 | 4.61 | 0.85 | -2.49 |
| 1942 | -0.94 | -0.42 | 0.72 | -2.05 | 5.08 | -0.17 | 2.14 | 2.01 | 2.07 | 0.55 | -0.38 | 1.96 |
| 1941 | -0.72 | -1.04 | -1.48 | -1.78 | -3.18 | -1.23 | 0.59 | -0.47 | -3.97 | -1.42 | -0.67 | 0.54 |
| 1940 | -2.01 | 0.31 | 2.48 | 1.80 | -0.27 | -1.11 | 0.48 | 0.30 | -1.10 | -1.30 | 0.94 | -0.29 |
| 1939 | -0.35 | 2.09 | 0.25 | 0.45 | -2.90 | -1.50 | -2.12 | -0.20 | -2.84 | 0.21 | -2.91 | -0.63 |
| 1938 | -0.19 | -0.23 | -0.89 | -0.78 | -1.38 | 3.63 | 4.23 | -0.38 | 2.53 | -0.70 | 0.14 | 0.34 |
| 1937 | 2.04 | -0.08 | -1.74 | 0.97 | -1.93 | 0.05 | 0.34 | 2.31 | -3.61 | 2.18 | -1.38 | -1.75 |
| 1936 | 2.00 | 0.01 | 3.09 | -0.13 | -2.12 | 1.21 | -2.81 | 1.00 | -3.31 | -0.41 | -2.18 | 2.19 |
| 1935 | -0.86 | -0.50 | -1.02 | -1.30 | -3.24 | 0.87 | 3.81 | -0.87 | -0.86 | -0.06 | 1.78 | -1.49 |
| 1934 | -0.68 | -1.30 | -0.60 | 0.16 | -1.05 | -0.06 | 0.22 | -0.24 | 4.05 | -1.94 | 0.66 | -0.13 |
| 1933 | -1.85 | 0.26 | 1.51 | 1.44 | 1.64 | -2.07 | 0.93 | 6.01 | 1.75 | -1.47 | -2.81 | -1.53 |
| 1932 | 0.73 | -1.05 | 0.84 | -2.02 | -0.45 | -1.37 | -1.78 | -1.19 | -3.46 | 2.79 | 2.74 | -1.29 |
| 1931 | -1.83 | -0.77 | -0.44 | -1.10 | -1.01 | -0.20 | 1.85 | -0.38 | -2.19 | -1.08 | -2.89 | -1.21 |
| 1930 | -1.56 | -0.27 | -1.05 | -0.82 | -2.31 | 0.08 | -1.05 | -1.88 | -2.20 | -2.35 | -1.99 | -0.92 |
| 1929 | -0.31 | 0.31 | -1.26 | 1.84 | -0.67 | -1.84 | -3.25 | -1.80 | -0.33 | 1.52 | -1.35 | -1.13 |
| 1928 | -1.83 | 0.80 | -0.84 | 1.17 | -2.56 | 2.70 | 1.97 | 1.22 | -1.65 | -2.53 | -2.32 | -3.08 |
| 1927 | -1.25 | 0.57 | -1.91 | -1.41 | -1.18 | -1.50 | 1.23 | 2.44 | -2.36 | 5.34 | -0.96 | 0.47 |
| 1926 | -1.35 | 1.48 | -2.05 | -1.92 | -3.50 | -1.37 | 0.72 | 1.55 | 0.64 | 0.49 | 0.72 | -1.69 |
| 1925 | 0.11 | -0.63 | -1.12 | -1.69 | -1.99 | -1.32 | 2.02 | -2.18 | -1.97 | 0.46 | -0.84 | -1.09 |
| 1924 | 0.61 | 0.60 | -1.54 | 1.36 | 1.80 | -0.54 | -1.55 | 0.03 | 1.85 | -3.40 | -2.41 | -2.06 |
| 1923 | 1.37 | -0.66 | -1.15 | -0.81 | -2.53 | -2.49 | -0.58 | -2.09 | -0.93 | -0.18 | -1.55 | -0.08 |
| 1922 | -1.94 | -0.38 | 0.23 | -1.26 | -1.21 | 1.67 | -0.05 | -0.61 | -3.25 | -1.52 | -2.89 | -1.43 |
| 1921 | -1.41 | 0.28 | -1.10 | -0.60 | -0.01 | -1.42 | 0.28 | -0.55 | -0.15 | -2.27 | 0.58 | -2.02 |
| 1920 | -1.40 | 0.37 | -0.82 | 0.25 | -3.14 | 0.61 | 0.72 | 0.46 | -0.18 | -1.94 | -0.56 | 0.95 |
| 1919 | -0.94 | -0.09 | 0.17 | -1.26 | 0.69 | -1.02 | 3.78 | 0.94 | -2.14 | -0.35 | 0.85 | -1.52 |
| 1918 | -0.21 | -0.34 | -1.96 | 0.31 | -0.06 | -0.89 | -1.10 | -1.13 | -0.63 | -1.48 | -2.04 | -0.47 |
| 1917 | -0.49 | -1.17 | -0.29 | -1.77 | -1.56 | 0.30 | 0.18 | 0.66 | -2.12 | 3.21 | -3.21 | -1.07 |
| 1916 | -2.24 | 0.94 | -0.13 | 0.01 | -1.48 | 0.32 | 1.31 | -2.39 | -0.83 | -1.95 | -1.73 | -0.29 |
| 1915 | 2.55 | 1.99 | -2.67 | -1.23 | -1.28 | -1.71 | 1.32 | 3.11 | -2.74 | -1.39 | -2.26 | 0.47 |
| 1914 | -0.22 | -0.21 | -0.99 | -0.06 | -2.04 | -1.57 | 0.70 | -0.85 | -3.74 | -2.06 | -1.79 | 0.47 |
| 1913 | 0.35 | -0.73 | 0.78 | 1.10 | -1.23 | -2.67 | -3.05 | -0.93 | -0.92 | 3.77 | -1.88 | -0.79 |
| 1912 | -1.63 | -0.52 | 2.07 | -0.09 | -0.68 | -2.47 | -1.64 | 0.29 | 1.80 | -0.33 | -1.55 | 0.36 |
| 1911 | -0.79 | -0.17 | -1.11 | -0.05 | -3.39 | 0.47 | -1.40 | 3.47 | 0.42 | 1.50 | -0.38 | -0.59 |
| 1910 | 1.71 | 0.89 | -3.12 | 2.09 | -1.55 | -0.25 | -3.44 | -0.76 | -0.12 | -2.53 | -1.19 | -1.36 |
| 1909 | -0.60 | 1.95 | -0.75 | 1.79 | -2.18 | -1.70 | -3.41 | -0.98 | -1.93 | -2.15 | -2.54 | 0.45 |
| 1908 | -0.50 | 1.84 | 0.01 | -1.22 | 1.88 | -2.30 | 0.24 | -0.24 | -2.27 | -0.97 | -3.06 | -0.94 |
| 1907 | -0.01 | -0.59 | -0.32 | -0.70 | -1.25 | -0.49 | -2.95 | -1.37 | 3.04 | 0.35 | 0.64 | 1.03 |
| 1906 | -1.32 | -0.90 | 0.65 | 0.10 | -1.36 | 0.11 | 0.36 | 0.67 | -2.43 | 1.28 | -2.94 | -0.27 |
| 1905 | 0.28 | -1.11 | 0.21 | -1.05 | -3.34 | -0.93 | 0.68 | 1.12 | -0.81 | -0.28 | -1.88 | -0.15 |
| 1904 | -0.31 | -0.43 | -0.20 | -0.27 | -1.71 | -1.23 | 1.65 | 1.84 | -0.17 | 0.22 | -1.99 | -1.91 |
| 1903 | -0.26 | 1.19 | 0.77 | -0.26 | -3.88 | 3.13 | 1.75 | 2.88 | -1.83 | 3.83 | -2.32 | -0.68 |
| 1902 | -0.96 | 2.35 | 0.32 | -0.45 | -2.95 | 1.12 | 3.11 | -0.52 | 0.62 | 2.87 | -2.24 | 2.70 |
| 1901 | -1.66 | -1.80 | 0.72 | 1.51 | 1.06 | -2.52 | 1.38 | 4.14 | -0.92 | -1.87 | -1.28 | 3.27 |
| 1900 | -0.20 | 1.95 | -0.26 | -1.57 | -2.01 | -1.74 | 0.13 | -0.80 | -2.38 | -0.38 | -1.16 | -1.45 |
| 1899 | -0.29 | 1.77 | 1.41 | -1.71 | -1.65 | -1.67 | 0.45 | -0.24 | 1.38 | -2.04 | -1.22 | -1.37 |