Climate Summary for December

Station: Philadelphia (366889) State: Pennsylvania Period of Record: 3/1872-3/2011 (# of years included = 137) Temperature Precipitation EXTREMES EXTREMES Greatest Daily Greatest | Cumulative Chance Chance Day Average Average | Highest Yr Lowest Yr || amount snowfall | average >=.01 in >=.1 in Max (F) Min (F) | (F) (F) || Inches Yr Inches Yr | precip(in) precip snow 1 46.8 31.9 | 72 2006* 11 1875 || 1.38 1920 0.8 1890 | 0.08 0.24 0.02 2 46.5 31.1 | 66 1970 11 1875 || 1.48 1986 2.0 1903 | 0.18 0.24 0.03 3 46.8 31.6 | 68 1950 9 1976 || 1.60 1967 2.0 1903 | 0.27 0.28 0.05 4 46.8 32.1 | 73 1998 12 1966* || 1.69 1927 5.8 1921 | 0.40 0.35 0.06 5 46.3 32.5 | 71 2001 13 1886 || 1.52 1993 7.0 2002 | 0.58 0.39 0.10 6 46.5 32.3 | 72 2001 15 1901 || 1.16 1996 6.2 1910 | 0.69 0.34 0.06 7 46.8 31.6 | 73 1998 15 1926* || 3.71 1914 2.8 1959 | 0.82 0.27 0.06 8 45.9 31.8 | 67 1980 14 1882 || 1.22 1972 3.5 1989 | 0.91 0.28 0.04 9 45.1 30.6 | 70 1966 6 1876 || 2.13 2009 2.9 1942 | 1.04 0.37 0.09 10 44.0 30.5 | 71 1966 4 1876 || 1.45 1969 4.3 1904 | 1.15 0.35 0.05 11 43.5 30.5 | 65 1971* 8 1880 || 2.72 2008 3.7 1960 | 1.30 0.38 0.06 12 44.1 30.7 | 65 1931 8 1988 || 1.45 1983 10.9 1960 | 1.43 0.38 0.06 13 44.9 30.7 | 65 1923 8 1960 || 2.90 1941 4.6 1915 | 1.62 0.45 0.09 14 43.4 29.8 | 69 1881 10 1960 || 2.02 1897 5.3 1951 | 1.81 0.35 0.11 15 42.4 28.4 | 66 2008* 7 1960 || 1.13 1901 4.5 1916 | 1.93 0.32 0.08 16 42.4 28.4 | 68 1971 9 1876 || 1.54 1974 7.1 1896 | 2.04 0.31 0.07 17 42.1 28.7 | 65 2000 7 1919* || 2.23 1888 7.3 1932 | 2.14 0.29 0.06 18 41.9 28.0 | 70 2006 4 1919 || 1.72 1977 6.0 1887 | 2.25 0.25 0.10 19 41.1 27.2 | 65 1929 4 1884 || 1.70 2009 22.5 2009 | 2.33 0.26 0.09 20 40.9 27.3 | 64 1957* 1 1942* || 1.32 1951 3.2 1966 | 2.46 0.30 0.08 21 41.8 28.1 | 66 1895 1 1942 || 1.40 1902 2.7 1962 | 2.60 0.35 0.09 22 42.3 28.2 | 64 1998 6 1989 || 1.77 1983 2.8 1908 | 2.74 0.34 0.06 23 43.3 28.7 | 66 1990* 7 1989 || 1.62 1907 5.2 1963 | 2.83 0.37 0.10 24 42.3 28.8 | 64 1990 3 1983 || 1.74 2003 12.4 1966 | 2.98 0.35 0.09 25 41.8 27.8 | 68 1964 1 1983* || 1.11 1945 5.5 1909 | 3.08 0.33 0.09 26 40.0 26.7 | 68 1964* 3 1983 || 1.90 1909 15.5 1909 | 3.26 0.38 0.11 27 39.6 26.9 | 64 1949 8 1989* || 1.55 1964 3.4 1990 | 3.37 0.31 0.09 28 41.6 27.6 | 66 2008 9 1950 || 1.45 1942 3.0 1990 | 3.48 0.32 0.06 29 41.0 27.5 | 72 1984 -1 1917 || 2.80 1901 3.9 1935 | 3.62 0.37 0.11 30 40.6 27.1 | 65 1990 -5 1880 || 2.30 1948 9.0 2000 | 3.72 0.35 0.08 31 41.1 26.7 | 66 1884 0 1880 || 1.09 1911 3.8 1967 | 3.81 0.38 0.07 * - Asterisk indicates that the record was also reached in previous years.