Every January in Philadelphia Center City, PA from 1941 to 2026, ranked: the mean temperature, the mean high and the mean low from the warmest, the precipitation from the wettest; a year missing more than a tenth of its days is not ranked.
| Year | Mean, °F | Rank | High, °F | Rank | Low, °F | Rank | Precipitation, in | Rank | Days missing |
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| 2026 | 31 | 63 | 37.2 | 69 | 24.8 | 65 | | | 2 |
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| 2025 | 31.4 | 61 | 37.5 | 67 | 25.3 | 61 | | | 0 |
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| 2024 | 37.4 | 25 | 43 | 30 | 31.7 | 19 | | | 0 |
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| 2023 | 44.2 | 1 | 50.3 | 2 | 38.2 | 1 | | | 0 |
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| 2022 | 32.3 | 53 | 39.7 | 49 | 24.9 | 64 | | | 2 |
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| 2021 | 37 | 28 | 42.6 | 31 | 31.4 | 23 | | | 0 |
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| 2020 | 40.9 | 6 | 47.6 | 6 | 34.3 | 8 | 2.47 | 38 | 0 |
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| 2019 | 35 | 37 | 43.2 | 29 | 26.9 | 46 | 5.42 | 8 | 0 |
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| 2018 | | | 41.7 | 40 | | | 2.87 | 34 | 5 |
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| 2017 | 39.1 | 11 | 44.3 | 25 | 34 | 9 | | | 0 |
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| 2016 | 34 | 40 | 41.2 | 41 | 26.9 | 46 | 1.18 | 47 | 0 |
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| 2015 | 30.2 | 68 | 36.8 | 72 | 23.6 | 72 | 3.12 | 27 | 0 |
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| 2014 | 29.3 | 73 | 37.5 | 67 | 21 | 81 | 2.94 | 32 | 0 |
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| 2013 | 36.8 | 30 | 42.5 | 34 | 31 | 25 | 3.47 | 21 | 0 |
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| 2012 | 37.8 | 21 | 45.6 | 12 | 30 | 32 | 2.98 | 29 | 0 |
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| 2011 | 30.8 | 66 | 36.1 | 76 | 25.5 | 58 | 4.00 | 17 | 0 |
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| 2010 | 34.3 | 39 | 40.4 | 46 | 28.1 | 40 | 2.97 | 30 | 0 |
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| 2009 | 28.6 | 75 | 34.1 | 82 | 23 | 77 | 2.95 | 31 | 0 |
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| 2008 | | | 42.6 | 31 | 30.4 | 29 | 2.14 | 40 | 4 |
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| 2007 | 38.8 | 14 | 45.2 | 16 | 32.3 | 15 | 4.17 | 14 | 1 |
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| 2006 | 42.3 | 4 | 49.4 | 4 | 35.1 | 6 | 5.32 | 11 | 0 |
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| 2005 | | | 39 | 54 | 27.2 | 44 | 5.36 | 10 | 4 |
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| 2004 | 28.7 | 74 | 34.2 | 81 | 23.3 | 75 | | | 0 |
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| 2003 | 31 | 63 | 36.1 | 76 | 25.8 | 55 | 2.09 | 42 | 3 |
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| 2002 | 41.5 | 5 | 47.5 | 7 | 35.6 | 4 | 3.11 | 28 | 0 |
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| 2001 | 34.9 | 38 | 40.2 | 47 | 29.7 | 36 | 3.37 | 23 | 0 |
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| 2000 | 33.1 | 48 | 39.8 | 48 | 26.5 | 51 | 4.06 | 16 | 0 |
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| 1999 | 35.3 | 35 | 42.6 | 31 | 28 | 41 | 5.99 | 4 | 0 |
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| 1998 | | | 48.1 | 5 | 35.2 | 5 | 5.84 | 6 | 4 |
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| 1997 | | | 36.9 | 71 | 22.1 | 78 | 3.29 | 24 | 4 |
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| 1996 | 32 | 54 | 38.8 | 57 | 25.2 | 62 | 5.74 | 7 | 0 |
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| 1995 | 38.1 | 20 | 44.2 | 26 | 31.6 | 20 | 3.13 | 26 | 1 |
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| 1994 | 26.2 | 80 | 33.4 | 83 | 19 | 84 | 6.13 | 3 | 0 |
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| 1993 | 39.1 | 11 | 45.5 | 14 | 32.6 | 12 | | | 0 |
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| 1992 | 37 | 28 | 43.8 | 28 | 30.1 | 31 | | | 0 |
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| 1991 | 37.1 | 27 | 44.4 | 24 | 29.7 | 36 | | | 0 |
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| 1990 | 42.9 | 3 | 50 | 3 | 35.7 | 3 | | | 0 |
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| 1989 | 39.2 | 10 | 45.9 | 11 | 32.5 | 14 | | | 0 |
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| 1988 | 31 | 63 | 38.1 | 62 | 23.9 | 70 | | | 0 |
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| 1987 | 36.4 | 32 | 42.1 | 35 | 30.7 | 26 | | | 0 |
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| 1986 | 37.5 | 23 | 45.1 | 17 | 29.8 | 34 | | | 0 |
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| 1985 | 30.3 | 67 | 37.1 | 70 | 23.5 | 73 | | | 0 |
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| 1984 | 32.6 | 49 | 38.9 | 55 | 26.4 | 52 | | | 0 |
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| 1983 | 37.4 | 25 | 44.2 | 26 | 30.6 | 27 | | | 0 |
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| 1982 | 27.8 | 77 | 35.3 | 79 | 20.4 | 83 | | | 0 |
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| 1981 | 29.8 | 72 | 36.2 | 75 | 23.5 | 73 | | | 0 |
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| 1980 | 35.9 | 34 | 41.8 | 39 | 29.9 | 33 | | | 0 |
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| 1979 | 33.7 | 43 | 40.8 | 45 | 26.6 | 50 | | | 0 |
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| 1978 | 30 | 69 | 36.8 | 72 | 23.3 | 75 | 8.61 | 1 | 0 |
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| 1977 | 24.6 | 81 | 31.4 | 86 | 17.8 | 85 | 2.50 | 36 | 0 |
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| 1976 | 31.8 | 56 | 38.9 | 55 | 24.7 | 66 | 4.51 | 13 | 0 |
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| 1975 | 38.6 | 15 | 45 | 18 | 32.2 | 16 | 3.74 | 20 | 0 |
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| 1974 | 38.5 | 17 | 45 | 18 | 31.9 | 17 | 3.42 | 22 | 0 |
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| 1973 | 38.2 | 19 | 44.9 | 20 | 31.5 | 21 | | | 0 |
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| 1972 | 38.6 | 15 | 45.5 | 14 | 31.8 | 18 | | | 0 |
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| 1971 | 30 | 69 | 36.4 | 74 | 23.7 | 71 | | | 0 |
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| 1970 | 28.5 | 76 | 34.8 | 80 | 22.1 | 78 | | | 0 |
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| 1969 | 32.5 | 51 | 38.4 | 60 | 26.7 | 49 | | | 0 |
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| 1968 | 31.2 | 62 | 38 | 63 | 24.5 | 68 | | | 0 |
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| 1967 | 40.9 | 6 | 47.3 | 8 | 34.5 | 7 | | | 0 |
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| 1966 | 31.5 | 60 | 37.6 | 65 | 25.4 | 60 | | | 0 |
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| 1965 | 31.8 | 56 | 38.8 | 57 | 24.7 | 66 | | | 0 |
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| 1964 | 37.6 | 22 | 44.8 | 22 | 30.5 | 28 | 3.97 | 18 | 0 |
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| 1963 | 31.9 | 55 | 38.7 | 59 | 25 | 63 | 2.10 | 41 | 0 |
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| 1962 | 34 | 40 | 41.2 | 41 | 26.8 | 48 | | | 0 |
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| 1961 | 29.9 | 71 | 35.7 | 78 | 24 | 69 | | | 0 |
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| 1960 | 36.7 | 31 | 42 | 37 | 31.5 | 21 | | | 0 |
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| 1959 | 33.6 | 44 | 41.1 | 43 | 26.1 | 53 | | | 0 |
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| 1958 | 33.4 | 46 | 39.2 | 53 | 27.6 | 42 | | | 0 |
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| 1957 | 31.6 | 59 | 37.6 | 65 | 25.6 | 57 | 1.31 | 46 | 0 |
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| 1956 | 34 | 40 | 39.4 | 51 | 28.7 | 38 | 2.50 | 36 | 0 |
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| 1955 | 33.5 | 45 | 39.4 | 51 | 27.5 | 43 | | | 0 |
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| 1954 | 33.4 | 46 | 41.1 | 43 | 25.7 | 56 | 2.04 | 44 | 0 |
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| 1953 | 38.9 | 13 | 44.9 | 20 | 32.9 | 11 | 5.94 | 5 | 0 |
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| 1952 | 38.5 | 17 | 45.6 | 12 | 31.3 | 24 | 5.30 | 12 | 0 |
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| 1951 | 37.5 | 23 | 44.5 | 23 | 30.4 | 29 | 4.14 | 15 | 0 |
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| 1950 | 44 | 2 | 52 | 1 | 36.1 | 2 | 2.06 | 43 | 0 |
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| 1949 | 40.5 | 8 | 47.2 | 9 | 33.8 | 10 | 6.33 | 2 | 0 |
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| 1948 | 27.3 | 78 | 33.1 | 84 | 21.5 | 80 | 5.42 | 8 | 0 |
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| 1947 | 39.8 | 9 | 46.9 | 10 | 32.6 | 12 | 3.81 | 19 | 0 |
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| 1946 | 35.2 | 36 | 42 | 37 | 28.4 | 39 | 1.51 | 45 | 0 |
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| 1945 | 26.8 | 79 | 32.9 | 85 | 20.7 | 82 | 2.73 | 35 | 0 |
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| 1944 | 36 | 33 | 42.1 | 35 | 29.8 | 34 | 2.94 | 32 | 0 |
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| 1943 | 32.6 | 49 | 38.3 | 61 | 27 | 45 | | | 0 |
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| 1942 | 32.5 | 51 | 39.5 | 50 | 25.5 | 58 | 2.34 | 39 | 0 |
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| 1941 | 31.8 | 56 | 37.7 | 64 | 26 | 54 | 3.16 | 25 | 0 |
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