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 | 2.66 | 2.27 | 2.85 | 3.29 | 3.55 | 4.31 | 3.62 | 3.32 | 3.74 | 3.11 | 3.30 | 2.76 |
| 2024 | -0.63 | -0.59 | -0.56 | |||||||||
| 2023 | -0.49 | -1.96 | -1.60 | -2.60 | 0.52 | |||||||
| 2023 | -0.77 | -1.34 | -1.43 | -1.97 | -2.55 | -1.61 | -0.31 | -0.49 | -1.96 | -1.60 | -2.60 | 0.52 |
| 2022 | -1.78 | -0.68 | -1.37 | -1.32 | -2.05 | -1.63 | -3.00 | -1.93 | 0.08 | -1.99 | -0.28 | -0.66 |
| 2021 | -1.61 | -0.45 | -1.61 | -0.57 | -1.10 | -2.63 | 0.66 | 0.15 | -0.63 | 1.39 | -2.33 | -2.02 |
| 2020 | -1.83 | -0.18 | -1.26 | -1.36 | -0.78 | -3.13 | -1.63 | -2.24 | -2.41 | -1.51 | -1.66 | 0.63 |
| 2019 | -0.06 | -1.18 | -1.44 | -0.05 | 1.40 | -0.96 | -0.86 | -0.63 | -2.36 | -0.82 | -1.90 | -1.19 |
| 2018 | -1.12 | -1.14 | -1.68 | -2.42 | -1.79 | -3.32 | -0.52 | -0.99 | -1.33 | -2.00 | -1.35 | -1.25 |
| 2017 | -1.63 | -1.32 | -1.78 | -1.36 | -2.04 | -3.10 | -2.52 | -2.04 | -3.06 | -1.57 | -3.05 | -2.58 |
| 2016 | -1.58 | 0.26 | -1.87 | -1.49 | -1.86 | -2.30 | -1.45 | -0.05 | -2.48 | -0.93 | -3.03 | -1.74 |
| 2015 | -1.56 | -1.21 | -1.49 | 0.80 | -1.65 | -0.09 | -0.56 | -0.75 | -0.73 | -1.06 | -1.52 | -0.55 |
| 2014 | -1.07 | -0.10 | -0.35 | -1.07 | 0.44 | -1.15 | -0.83 | 0.32 | -1.74 | -0.41 | -1.54 | -0.69 |
| 2013 | -0.47 | -0.76 | -1.78 | -0.83 | -0.70 | 0.08 | 0.25 | -0.78 | -0.81 | -1.21 | -0.20 | -0.20 |
| 2012 | -0.70 | -1.36 | -1.46 | -1.38 | -0.12 | -1.78 | -0.63 | 0.05 | 0.28 | 0.69 | -2.62 | 1.12 |
| 2011 | -1.26 | 1.15 | 2.20 | 4.25 | 2.69 | -2.00 | -1.61 | 3.09 | 6.20 | 0.57 | -1.34 | -0.47 |
| 2010 | 1.05 | -0.62 | 0.55 | -1.13 | -1.03 | -1.31 | 0.13 | 0.30 | -1.64 | 4.28 | -0.55 | 0.77 |
| 2009 | -0.56 | -1.15 | -0.85 | -0.65 | 1.33 | 0.71 | 1.47 | 1.89 | -1.37 | 0.96 | -1.78 | 0.31 |
| 2008 | -0.81 | 3.20 | 3.87 | -0.56 | -0.58 | -0.08 | 1.11 | -0.81 | 0.03 | -0.01 | -1.69 | 1.59 |
| 2007 | 0.74 | -0.14 | 0.48 | 0.42 | -1.41 | -1.22 | -0.14 | 0.92 | -1.01 | 1.71 | 0.96 | 1.94 |
| 2006 | 1.89 | -0.44 | -1.30 | -0.76 | -0.17 | 4.31 | 1.76 | 1.22 | 0.54 | 1.33 | 0.44 | -0.76 |
| 2005 | 2.37 | -0.12 | 1.24 | 0.97 | -2.09 | -0.90 | -0.57 | 1.79 | -1.53 | 3.87 | 1.83 | -0.22 |
| 2004 | 0.13 | -0.47 | -0.74 | 0.18 | 2.25 | -0.69 | 5.35 | 2.70 | 5.58 | -0.60 | 0.05 | 1.05 |
| 2003 | -0.01 | 0.59 | 0.00 | -0.78 | 0.06 | 2.27 | 1.46 | 1.19 | 3.40 | 1.29 | 0.12 | 1.43 |
| 2002 | -0.62 | -0.42 | 0.92 | -0.20 | 1.81 | 1.26 | -1.16 | -1.05 | 1.02 | 1.71 | -0.28 | 1.03 |
| 2001 | -1.29 | -1.04 | 2.03 | -1.14 | -1.52 | 1.17 | -1.33 | 0.83 | 2.43 | -1.19 | -1.30 | -0.03 |
| 2000 | -0.20 | 0.93 | 0.33 | 2.31 | 1.99 | 0.77 | -0.99 | -0.61 | -0.22 | -0.16 | -1.41 | -0.20 |
| 1999 | 2.49 | -1.02 | 1.06 | -0.34 | -1.70 | -0.93 | -0.64 | -0.85 | 3.75 | -1.52 | -0.12 | -0.62 |
| 1998 | 1.38 | 1.33 | 0.68 | 1.45 | 1.00 | 1.47 | 0.09 | -2.11 | -1.87 | 0.51 | -2.09 | -1.41 |
| 1997 | -0.68 | -0.46 | 0.18 | -1.93 | -0.77 | -1.16 | -1.16 | 1.54 | -0.26 | -1.85 | 1.41 | -0.06 |
| 1996 | 5.06 | -0.21 | -0.11 | 1.66 | 0.65 | -0.14 | 0.58 | -0.73 | 1.94 | 1.56 | 1.19 | 3.01 |
| 1995 | 0.95 | -0.49 | -1.66 | -0.59 | -1.06 | -1.81 | -0.42 | -1.49 | -0.09 | 4.18 | 1.09 | -0.82 |
| 1994 | 1.25 | -0.40 | 1.59 | -0.65 | -1.23 | 2.42 | 1.11 | 4.79 | -1.00 | -1.95 | 0.29 | -0.36 |
| 1993 | -0.41 | -0.80 | 2.20 | 5.12 | -2.04 | -0.61 | -1.53 | 1.00 | 0.97 | -0.70 | 1.18 | -0.22 |
| 1992 | -0.43 | -0.68 | 0.94 | -0.22 | -0.04 | -1.99 | 2.54 | 0.15 | 0.10 | -0.48 | 0.77 | 0.33 |
| 1991 | -0.77 | -0.82 | 0.53 | -0.49 | -1.97 | -3.62 | -0.48 | -0.80 | -0.50 | -1.11 | -0.04 | 0.28 |
| 1990 | 0.02 | -0.03 | -1.42 | -0.96 | 0.37 | -1.75 | 1.15 | 1.63 | -0.94 | 3.90 | -0.74 | 2.03 |
| 1989 | -1.39 | -0.50 | 0.77 | -1.80 | 4.27 | 2.27 | -0.36 | -1.23 | 0.42 | 0.62 | -0.81 | -2.02 |
| 1988 | -1.53 | 0.49 | -1.37 | -1.37 | 0.61 | -3.14 | -0.43 | 1.08 | -1.99 | -1.05 | -0.67 | -1.82 |
| 1987 | 0.23 | -1.75 | -1.36 | 1.57 | -1.52 | 0.31 | 0.45 | -0.40 | -0.20 | -0.60 | -0.90 | -0.90 |
| 1986 | -0.74 | 0.23 | 0.09 | 0.20 | -0.87 | 1.09 | 1.48 | -0.04 | -1.58 | -0.61 | 1.53 | -0.68 |
| 1985 | -1.99 | -0.95 | -0.88 | -1.66 | 0.85 | -0.37 | 0.87 | 1.31 | -0.17 | -1.24 | 1.94 | -1.26 |
| 1984 | -1.28 | 1.69 | 0.33 | 1.67 | 2.91 | -1.43 | 1.22 | 0.72 | -2.03 | -0.93 | -0.37 | -0.10 |
| 1983 | -1.04 | -0.69 | 0.21 | 4.29 | -0.21 | 1.49 | -2.03 | -0.67 | -2.25 | -0.44 | 0.83 | 3.21 |
| 1982 | -0.28 | 0.86 | -1.17 | -0.94 | -0.42 | 2.74 | -0.70 | -1.93 | -1.17 | -2.22 | 0.64 | -0.78 |
| 1981 | -2.07 | 3.11 | -2.10 | -0.17 | -0.92 | 0.62 | -0.22 | -1.99 | -0.59 | 2.32 | -0.95 | -0.52 |
| 1980 | -1.83 | -1.33 | 1.96 | 1.06 | -1.86 | -0.71 | -0.61 | -1.99 | -1.93 | 0.14 | -0.46 | -1.61 |
| 1979 | 3.29 | 0.05 | -0.48 | -1.07 | 0.77 | -1.52 | -0.47 | 0.83 | 1.05 | 0.98 | 0.39 | -0.88 |
| 1978 | 4.37 | -0.99 | -0.63 | -1.24 | 1.37 | -0.32 | -0.03 | 1.68 | -0.74 | 0.22 | -1.83 | 0.66 |
| 1977 | -1.38 | -0.67 | 1.21 | -0.05 | -1.80 | 0.41 | 0.67 | 1.14 | 3.33 | 1.25 | 0.75 | 1.85 |
| 1976 | 0.64 | -0.08 | -0.16 | -1.25 | 0.22 | 0.89 | 0.40 | -0.24 | -0.91 | 3.65 | -2.28 | -1.15 |
| 1975 | -0.43 | 0.84 | -0.75 | -2.24 | 1.08 | 0.63 | 0.10 | 0.99 | 5.83 | -0.03 | -1.04 | 0.40 |
| 1974 | -0.12 | -0.33 | 0.97 | -0.99 | -0.55 | -0.03 | -0.05 | -0.79 | 1.00 | -2.03 | -0.10 | 0.51 |
| 1973 | -0.49 | -0.33 | -0.45 | 0.97 | 0.30 | 0.10 | 0.40 | 0.23 | 0.78 | -0.54 | -1.28 | 2.22 |
| 1972 | -1.18 | 0.91 | 0.09 | -0.49 | 1.10 | 6.29 | -1.04 | -0.78 | -1.34 | -0.68 | 3.56 | 0.60 |
| 1971 | -1.30 | 2.15 | -0.63 | -1.77 | -0.57 | -1.93 | 0.21 | -0.48 | 0.64 | -1.14 | -0.40 | 0.17 |
| 1970 | -2.12 | 0.21 | -0.78 | -0.74 | 0.14 | -1.96 | 1.40 | 0.68 | -0.45 | 1.36 | 0.29 | -0.19 |
| 1969 | -1.72 | -1.27 | -1.99 | 0.35 | -0.91 | 0.53 | 1.13 | -0.60 | -2.36 | -0.95 | 1.17 | 1.92 |
| 1968 | -0.47 | -2.01 | -0.01 | -1.78 | 2.52 | 0.18 | -2.12 | -0.97 | 1.18 | -0.46 | 1.00 | -0.24 |
| 1967 | -1.73 | -0.93 | 1.58 | -0.86 | 0.85 | -1.21 | 1.10 | 1.82 | -1.15 | 0.94 | 0.00 | -0.81 |
| 1966 | 0.26 | 0.64 | -0.27 | -1.29 | -0.60 | -2.34 | -1.91 | -1.83 | 0.43 | -1.32 | 0.71 | -0.94 |
| 1965 | -0.04 | -0.87 | -1.16 | -0.78 | -0.60 | -1.76 | -1.32 | 1.35 | -0.53 | 0.12 | -1.20 | -1.57 |
| 1964 | 1.29 | -0.10 | 1.21 | 0.21 | -1.71 | -2.25 | -0.61 | -1.10 | -3.08 | -2.14 | -1.72 | 0.00 |
| 1963 | -0.93 | -0.98 | -0.01 | -1.68 | 0.63 | -2.75 | 0.23 | -0.97 | -1.32 | -2.91 | 2.08 | -0.86 |
| 1962 | 0.05 | 0.53 | -1.04 | 1.09 | -2.35 | -1.99 | -1.25 | 0.00 | 0.26 | 1.29 | -1.31 | -0.43 |
| 1961 | -1.12 | 0.64 | -0.19 | 2.06 | -0.34 | -0.17 | 0.39 | 0.58 | -2.59 | -1.30 | -0.48 | -1.19 |
| 1960 | -0.31 | 1.22 | -0.83 | 0.11 | 2.02 | 1.42 | 0.27 | -0.09 | 2.36 | -1.43 | -1.94 | -1.70 |
| 1959 | 0.12 | -0.26 | -0.42 | 0.32 | -1.84 | -1.57 | -0.93 | 2.04 | -1.58 | 3.02 | 1.72 | 0.64 |
| 1958 | 1.14 | 1.05 | -0.11 | 1.30 | -0.12 | -0.76 | 1.70 | -0.24 | 0.98 | -0.15 | -1.01 | -1.88 |
| 1957 | -0.89 | -0.89 | -0.43 | 2.42 | -0.81 | -0.46 | -0.45 | -1.08 | -0.27 | -0.92 | -1.26 | 1.53 |
| 1956 | -1.35 | 1.21 | 1.37 | -0.48 | -1.21 | -1.55 | 1.97 | 0.46 | 0.18 | -0.71 | -0.49 | 1.05 |
| 1955 | -2.03 | 0.42 | 0.39 | -1.02 | -1.74 | -2.27 | -1.26 | 4.45 | -1.37 | 5.19 | -0.89 | -2.03 |
| 1954 | -0.68 | 0.15 | -0.07 | 0.88 | 1.17 | -1.54 | -1.43 | 1.01 | -1.06 | -1.19 | 0.00 | 0.35 |
| 1953 | 0.49 | -0.55 | 0.68 | 0.20 | 2.41 | -2.11 | -1.26 | -1.40 | -0.56 | -0.53 | -0.65 | -0.33 |
| 1952 | 0.30 | -0.27 | 0.91 | 0.87 | 1.79 | -2.96 | 1.44 | 0.30 | -0.66 | -1.46 | 0.85 | 0.77 |
| 1951 | -0.27 | 0.80 | 1.45 | -0.43 | -1.67 | 0.27 | 0.06 | -1.08 | -1.47 | -1.39 | 0.73 | 1.23 |
| 1950 | 0.36 | 1.28 | 1.48 | -0.81 | -0.12 | -0.54 | 0.80 | 2.76 | 0.22 | -0.56 | 2.40 | 0.96 |
| 1949 | -0.27 | -0.48 | -1.16 | 0.73 | 1.41 | -2.69 | -0.17 | 1.42 | 0.06 | -0.92 | -1.67 | 0.12 |
| 1948 | 0.34 | -0.46 | 0.99 | 2.36 | 0.93 | -0.21 | 0.71 | -0.65 | -2.58 | 0.25 | 1.53 | 0.84 |
| 1947 | 0.01 | -1.17 | -0.09 | 1.80 | 3.47 | -0.82 | 3.59 | 0.78 | -1.08 | -2.29 | 0.21 | -1.41 |
| 1946 | -1.53 | -0.25 | -0.03 | -2.36 | 5.45 | 0.38 | 1.26 | 1.27 | 0.82 | 0.11 | -2.30 | -1.03 |
| 1945 | 0.26 | -0.04 | -0.29 | 0.02 | 2.20 | -0.22 | 1.53 | -0.51 | 1.64 | 0.22 | 2.57 | -0.65 |
| 1944 | -1.88 | -0.46 | 0.07 | -0.19 | 1.98 | 0.82 | -0.96 | -1.40 | -0.30 | 0.04 | -0.52 | 0.43 |
| 1943 | -0.77 | -1.02 | 0.05 | 0.67 | 2.46 | -1.54 | 0.25 | -0.11 | -3.12 | 3.74 | -0.41 | -2.00 |
| 1942 | -0.89 | 0.36 | 0.58 | -1.77 | 1.23 | -1.99 | 2.00 | -0.26 | 1.40 | 0.78 | -0.22 | 1.94 |
| 1941 | -0.76 | -1.74 | -0.53 | -0.53 | -1.95 | -0.39 | 1.83 | -0.14 | -2.92 | -0.61 | -1.15 | 0.24 |
| 1940 | -1.67 | 1.26 | 1.76 | 0.64 | 1.03 | -0.77 | -0.52 | 1.42 | -0.55 | -1.09 | -0.80 | -0.35 |
| 1939 | -0.08 | 0.88 | -0.22 | -1.01 | -2.14 | -1.24 | -0.67 | -0.77 | 1.09 | 1.01 | -2.64 | -0.70 |
| 1938 | -0.41 | 0.20 | -1.08 | -1.07 | -0.42 | 0.32 | 0.20 | -0.36 | 1.57 | -1.70 | -0.45 | 0.01 |
| 1937 | 1.14 | -0.14 | -1.21 | 1.06 | -0.39 | 0.29 | -0.57 | 4.77 | -1.80 | 2.87 | -0.81 | -0.95 |
| 1936 | -0.10 | -1.06 | 3.87 | -0.93 | -0.58 | -1.32 | -2.24 | 2.74 | -2.34 | 0.50 | -0.48 | -0.18 |
| 1935 | -0.40 | -0.56 | -0.86 | -0.24 | -0.99 | -0.07 | 0.73 | 0.05 | -1.28 | -0.44 | 0.17 | -0.71 |
| 1934 | -1.19 | -1.43 | 0.02 | -0.80 | -2.05 | -1.06 | 0.41 | 0.38 | 3.59 | -2.14 | -0.27 | -0.84 |
| 1933 | -1.28 | -1.07 | 0.51 | 0.19 | 0.83 | -1.64 | 0.54 | 4.82 | 2.09 | -0.74 | -1.89 | -0.76 |
| 1932 | 0.86 | -0.19 | 0.87 | -1.78 | 1.23 | -2.25 | 0.14 | -1.32 | -1.87 | 2.88 | 0.34 | -1.86 |
| 1931 | -1.46 | -0.53 | -1.06 | -0.55 | 3.00 | -1.36 | 1.73 | -0.97 | -0.38 | -2.27 | -2.30 | -0.16 |
| 1930 | -1.65 | -0.55 | -0.26 | -1.37 | -0.41 | -0.46 | -1.34 | -2.45 | -1.46 | -2.34 | -2.30 | -1.26 |
| 1929 | -0.67 | -0.20 | -0.69 | 1.64 | 0.25 | -1.90 | -1.68 | -1.51 | -0.24 | 1.06 | -0.94 | -0.71 |
| 1928 | -1.09 | 0.26 | -0.38 | 0.77 | -1.52 | 1.94 | 0.52 | 0.69 | -1.81 | -1.70 | -1.58 | -2.32 |
| 1927 | -1.20 | 0.72 | -0.98 | -1.94 | -0.12 | -2.08 | 0.49 | 0.43 | -2.00 | 4.24 | 1.97 | 0.73 |
| 1926 | -0.92 | 1.03 | -1.44 | -1.80 | -2.34 | -1.07 | -0.48 | 0.87 | 1.37 | 0.50 | 0.32 | -1.41 |
| 1925 | 0.25 | -0.36 | -0.65 | -1.50 | -0.33 | -1.16 | 0.55 | -1.57 | -0.81 | 0.27 | -0.64 | -1.33 |
| 1924 | 0.05 | 0.07 | -1.49 | 0.19 | 1.03 | -1.25 | -0.59 | 0.15 | 2.37 | -3.00 | -2.17 | -1.66 |
| 1923 | 0.52 | -0.71 | -1.00 | -1.43 | -0.82 | -1.87 | -0.50 | -1.66 | -0.52 | -0.36 | -1.07 | 0.37 |
| 1922 | -1.18 | -0.52 | 0.16 | -1.06 | -1.28 | 1.79 | -1.04 | -0.30 | -2.65 | -0.89 | -2.73 | -1.34 |
| 1921 | -1.42 | -0.22 | -0.45 | -1.15 | -0.84 | -1.85 | -0.22 | -0.61 | 0.20 | -1.29 | 1.36 | -1.53 |
| 1920 | -1.39 | -0.02 | -0.55 | -0.86 | -2.02 | -0.94 | -0.15 | 0.08 | 0.32 | -1.77 | 0.04 | -0.09 |
| 1919 | -1.35 | -0.58 | -0.04 | -1.38 | 1.10 | -1.45 | 1.15 | 1.24 | -1.74 | -0.48 | 0.45 | -1.22 |
| 1918 | -0.79 | -0.01 | -1.29 | -0.55 | 0.61 | -1.05 | -1.21 | -0.29 | 0.32 | -0.38 | -1.97 | -0.76 |
| 1917 | -0.63 | -0.96 | -0.27 | -2.24 | -0.83 | 0.68 | -0.60 | 2.96 | -1.93 | 3.06 | -3.21 | -1.45 |
| 1916 | -2.15 | 0.75 | 0.05 | -0.41 | -1.16 | 0.13 | -0.07 | -1.71 | -0.32 | -1.48 | -1.60 | -0.74 |
| 1915 | 1.44 | 1.09 | -2.09 | -1.72 | -0.59 | -1.61 | 0.57 | 2.38 | -1.83 | -0.88 | -2.00 | 0.16 |
| 1914 | -0.54 | -0.37 | -0.46 | 0.36 | -0.58 | -1.54 | 0.09 | -0.46 | -3.05 | -2.14 | -2.10 | 0.47 |
| 1913 | 0.25 | -0.84 | 0.91 | -0.55 | -0.72 | -2.64 | -1.16 | -1.53 | -0.84 | 2.40 | -0.83 | -0.90 |
| 1912 | -1.67 | -0.53 | 0.56 | 0.05 | -0.72 | -3.00 | -0.37 | 0.76 | 1.85 | -0.42 | -1.23 | -0.39 |
| 1911 | -1.13 | -0.27 | -0.72 | -1.14 | -1.56 | -0.66 | -1.38 | 2.55 | 0.96 | 0.35 | -1.27 | -0.74 |
| 1910 | 1.29 | 1.00 | -2.04 | 0.17 | -0.76 | -1.52 | -1.61 | -1.03 | 0.53 | -2.52 | -1.34 | -0.87 |
| 1909 | -0.70 | 1.42 | -0.61 | 0.95 | -1.86 | -1.77 | -1.90 | -2.04 | -1.66 | -1.78 | -2.44 | -0.31 |
| 1908 | -1.03 | 1.34 | 0.04 | -0.73 | 1.58 | -2.30 | 0.00 | -1.06 | -2.14 | -1.18 | -2.85 | -0.72 |
| 1907 | -0.97 | -0.85 | -0.33 | -1.51 | -1.39 | -1.14 | -1.20 | -1.69 | 2.80 | 0.41 | -0.45 | 0.69 |
| 1906 | -1.44 | -1.05 | 0.61 | -1.04 | -0.22 | -0.07 | -0.58 | 0.75 | -1.84 | 1.33 | -2.26 | -0.10 |
| 1905 | 0.41 | -1.22 | -0.06 | -1.42 | -2.82 | -0.16 | 0.07 | 1.34 | -0.44 | -0.07 | -1.78 | 0.05 |
| 1904 | -0.07 | -0.32 | 0.27 | -0.63 | -0.43 | -1.31 | 0.11 | 0.36 | 0.08 | 0.05 | -2.90 | -1.25 |
| 1903 | -0.45 | 0.70 | 0.95 | -1.35 | -3.13 | 1.72 | 0.32 | 1.74 | -1.83 | 2.50 | -1.82 | -0.65 |
| 1902 | -0.93 | 1.12 | 0.20 | -0.34 | -2.04 | 0.24 | 1.64 | -1.17 | 0.89 | 1.54 | -2.81 | 1.25 |
| 1901 | -1.22 | -1.48 | 0.46 | 0.98 | 1.56 | -1.62 | -0.42 | 2.91 | -0.58 | -1.54 | -1.39 | 1.70 |
| 1900 | -0.79 | 1.09 | 0.42 | -2.33 | -1.06 | -1.97 | 0.00 | -0.96 | -2.08 | -0.43 | 0.50 | -1.18 |
| 1899 | -1.32 | 0.54 | 0.93 | -2.02 | -0.95 | -1.97 | -0.47 | -0.21 | 1.18 | -1.92 | -1.50 | -0.41 |