Every July in Allentown, PA from 1912 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 | 75.2 | 34 | 86.1 | 29 | 64.3 | 37 | 3.70 | 73 | 0 |
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| 2025 | 77.3 | 10 | 87.1 | 22 | 67.5 | 2 | 3.93 | 71 | 0 |
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| 2024 | 76.9 | 15 | 87.3 | 20 | 66.5 | 11 | 3.60 | 76 | 0 |
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| 2023 | 75.4 | 32 | 85.4 | 48 | 65.4 | 24 | 6.27 | 25 | 0 |
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| 2022 | 76.4 | 19 | 87.7 | 17 | 65.1 | 26 | 2.38 | 90 | 0 |
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| 2021 | 74.1 | 55 | 84.4 | 66 | 63.8 | 49 | 4.46 | 57 | 0 |
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| 2020 | 78 | 3 | 88.8 | 7 | 67.1 | 5 | 4.90 | 52 | 0 |
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| 2019 | 77.9 | 6 | 88.4 | 11 | 67.4 | 4 | 9.55 | 3 | 0 |
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| 2018 | 76.7 | 17 | 87.9 | 14 | 65.6 | 19 | 5.80 | 36 | 0 |
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| 2017 | 75.6 | 28 | 85.4 | 48 | 65.8 | 16 | 8.21 | 9 | 0 |
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| 2016 | 77.1 | 12 | 88.6 | 10 | 65.5 | 22 | 6.72 | 21 | 0 |
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| 2015 | 74.6 | 43 | 85.3 | 51 | 63.9 | 47 | 5.43 | 42 | 0 |
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| 2014 | 73.7 | 65 | 84.3 | 67 | 63.1 | 62 | 4.32 | 62 | 0 |
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| 2013 | 77 | 13 | 86.6 | 24 | 67.5 | 2 | 4.17 | 64 | 0 |
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| 2012 | 77.5 | 9 | 88.7 | 8 | 66.3 | 12 | 4.02 | 67 | 0 |
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| 2011 | 78 | 3 | 89.7 | 4 | 66.2 | 13 | 3.94 | 70 | 0 |
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| 2010 | 76.5 | 18 | 88.2 | 13 | 64.9 | 30 | 8.87 | 7 | 0 |
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| 2009 | 70.1 | 101 | 80.5 | 101 | 59.7 | 102 | 5.93 | 31 | 0 |
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| 2008 | 74.5 | 46 | 85.7 | 41 | 63.4 | 59 | 6.08 | 28 | 0 |
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| 2007 | 72.4 | 87 | 83.4 | 84 | 61.5 | 87 | 5.33 | 45 | 0 |
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| 2006 | 75.9 | 23 | 86.1 | 29 | 65.6 | 19 | 8.17 | 10 | 0 |
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| 2005 | 75.6 | 28 | 85.6 | 47 | 65.6 | 19 | 4.23 | 63 | 0 |
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| 2004 | 72.3 | 92 | 81.9 | 95 | 62.7 | 70 | 8.06 | 12 | 0 |
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| 2003 | 74.2 | 52 | 84.8 | 58 | 63.5 | 58 | 5.44 | 41 | 0 |
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| 2002 | 75.6 | 28 | 87.6 | 18 | 63.7 | 52 | 1.14 | 107 | 0 |
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| 2001 | 68.9 | 103 | 80.3 | 102 | 57.4 | 104 | 4.63 | 55 | 0 |
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| 2000 | 70.2 | 100 | 80 | 104 | 60.3 | 99 | 3.35 | 78 | 0 |
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| 1999 | 78 | 3 | 91.3 | 1 | 64.6 | 33 | 0.33 | 111 | 0 |
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| 1998 | 72.8 | 81 | 84.2 | 69 | 61.5 | 87 | 1.17 | 106 | 0 |
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| 1997 | 72.3 | 92 | 84.6 | 64 | 60 | 101 | 6.84 | 20 | 0 |
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| 1996 | 70.4 | 99 | 80.1 | 103 | 60.6 | 97 | 7.12 | 17 | 0 |
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| 1995 | 76.3 | 21 | 86.1 | 29 | 66.6 | 10 | 5.86 | 33 | 0 |
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| 1994 | 77.6 | 8 | 87.2 | 21 | 68 | 1 | 5.57 | 38 | 0 |
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| 1993 | 76.9 | 15 | 86.9 | 23 | 66.8 | 8 | 2.99 | 82 | 0 |
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| 1992 | 72.4 | 87 | 81.1 | 100 | 63.7 | 52 | 5.36 | 44 | 0 |
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| 1991 | 74.6 | 43 | 84.7 | 62 | 64.6 | 33 | 5.28 | 46 | 0 |
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| 1990 | 74.2 | 52 | 84 | 73 | 64.3 | 37 | 3.20 | 79 | 0 |
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| 1989 | 72.7 | 82 | 81.8 | 96 | 63.6 | 55 | 4.09 | 65 | 0 |
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| 1988 | 77.9 | 6 | 88.7 | 8 | 67 | 6 | 6.17 | 26 | 0 |
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| 1987 | 75.9 | 23 | 86.1 | 29 | 65.7 | 18 | 4.41 | 59 | 0 |
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| 1986 | 73.9 | 60 | 83.5 | 81 | 64.2 | 41 | 4.46 | 57 | 0 |
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| 1985 | 73.2 | 74 | 83.1 | 87 | 63.4 | 59 | 7.61 | 15 | 0 |
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| 1984 | 73.2 | 74 | 82.1 | 94 | 64.3 | 37 | 9.26 | 4 | 0 |
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| 1983 | 76.4 | 19 | 87.8 | 15 | 65 | 28 | 2.02 | 96 | 0 |
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| 1982 | 73.4 | 72 | 84 | 73 | 62.9 | 65 | 2.86 | 83 | 0 |
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| 1981 | 74.7 | 42 | 84.8 | 58 | 64.5 | 35 | 2.71 | 85 | 0 |
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| 1980 | 77.3 | 10 | 88.4 | 11 | 66.1 | 14 | 1.50 | 103 | 0 |
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| 1979 | 73.2 | 74 | 82.3 | 92 | 64 | 43 | 5.57 | 38 | 0 |
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| 1978 | 72.4 | 87 | 82.2 | 93 | 62.6 | 72 | 3.64 | 74 | 0 |
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| 1977 | 75.4 | 32 | 86.2 | 26 | 64.7 | 31 | 4.33 | 61 | 0 |
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| 1976 | 71.6 | 96 | 81.6 | 98 | 61.6 | 85 | 2.11 | 94 | 0 |
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| 1975 | 73.7 | 65 | 83.1 | 87 | 64.3 | 37 | 7.71 | 14 | 0 |
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| 1974 | 73.2 | 74 | 83.7 | 80 | 62.8 | 68 | 1.40 | 104 | 0 |
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| 1973 | 75.2 | 34 | 85.3 | 51 | 65.1 | 26 | 2.16 | 93 | 0 |
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| 1972 | 74.9 | 40 | 84.3 | 67 | 65.5 | 22 | 5.85 | 34 | 0 |
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| 1971 | 72.5 | 84 | 83.9 | 78 | 61.2 | 91 | 3.04 | 80 | 0 |
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| 1970 | 73.7 | 65 | 83.4 | 84 | 64.1 | 42 | 5.40 | 43 | 0 |
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| 1969 | 72.2 | 94 | 81.6 | 98 | 62.7 | 70 | 10.42 | 1 | 0 |
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| 1968 | 74.5 | 46 | 86.1 | 29 | 62.8 | 68 | 1.60 | 101 | 0 |
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| 1967 | 72.6 | 83 | 83.3 | 86 | 62 | 79 | 5.85 | 34 | 0 |
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| 1966 | 77 | 13 | 91 | 3 | 62.9 | 65 | 1.91 | 97 | 0 |
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| 1965 | 72.4 | 87 | 84.6 | 64 | 60.2 | 100 | 1.58 | 102 | 0 |
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| 1964 | 73.8 | 63 | 84 | 73 | 63.7 | 52 | 2.29 | 91 | 0 |
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| 1963 | 74.1 | 55 | 86.1 | 29 | 62.1 | 78 | 2.48 | 87 | 0 |
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| 1962 | 71.5 | 97 | 83.5 | 81 | 59.5 | 103 | 1.61 | 100 | 0 |
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| 1961 | 73.8 | 63 | 84 | 73 | 63.6 | 55 | 7.00 | 19 | 0 |
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| 1960 | 71.1 | 98 | 81.8 | 96 | 60.4 | 98 | 6.64 | 23 | 0 |
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| 1959 | 74.3 | 51 | 84.8 | 58 | 63.8 | 49 | 5.87 | 32 | 0 |
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| 1958 | 74.6 | 43 | 84.1 | 70 | 65.2 | 25 | 4.66 | 54 | 0 |
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| 1957 | 73.6 | 68 | 86.2 | 26 | 61 | 92 | 1.05 | 109 | 0 |
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| 1956 | 69.9 | 102 | 79 | 105 | 60.8 | 94 | 6.16 | 27 | 0 |
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| 1955 | 79 | 1 | 91.1 | 2 | 66.8 | 8 | 0.42 | 110 | 0 |
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| 1954 | 73.6 | 68 | 86.4 | 25 | 60.8 | 94 | 1.71 | 99 | 0 |
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| 1953 | 73.9 | 60 | 85.8 | 40 | 62 | 79 | 5.14 | 50 | 0 |
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| 1952 | 75.8 | 25 | 87.6 | 18 | 63.9 | 47 | 8.75 | 8 | 0 |
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| 1951 | 72.5 | 84 | 82.6 | 89 | 62.5 | 75 | 5.98 | 29 | 0 |
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| 1950 | 72.4 | 87 | 84 | 73 | 60.8 | 94 | 5.22 | 48 | 0 |
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| 1949 | 78.3 | 2 | 89.6 | 6 | 66.9 | 7 | 4.51 | 56 | 0 |
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| 1948 | 74.5 | 46 | 86 | 36 | 63 | 64 | 2.41 | 89 | 0 |
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| 1947 | 73 | 79 | 84.1 | 70 | 61.9 | 81 | 4.93 | 51 | 0 |
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| 1946 | 73.9 | 60 | 86.2 | 26 | 61.6 | 85 | 6.64 | 23 | 0 |
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| 1945 | 73 | 79 | 82.4 | 91 | 63.6 | 55 | 8.17 | 10 | 0 |
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| 1944 | 76 | 22 | 89.7 | 4 | 62.2 | 77 | 1.39 | 105 | 0 |
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| 1943 | 75 | 37 | 84.9 | 57 | 65 | 28 | 2.19 | 92 | 0 |
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| 1942 | 74.8 | 41 | 84.8 | 58 | 64.7 | 31 | 4.74 | 53 | 0 |
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| 1941 | 74.5 | 46 | 85.1 | 55 | 64 | 43 | 4.01 | 68 | 0 |
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| 1940 | 74.2 | 52 | 86 | 36 | 62.3 | 76 | | | 0 |
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| 1939 | 74.5 | 46 | 85.7 | 41 | 63.2 | 61 | 3.59 | 77 | 0 |
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| 1938 | 74 | 59 | 85.2 | 53 | 62.9 | 65 | 8.99 | 5 | 0 |
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| 1937 | 75.1 | 36 | 85.7 | 41 | 64.5 | 35 | 5.46 | 40 | 1 |
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| 1936 | 75.7 | 27 | 87.8 | 15 | 63.8 | 49 | 1.14 | 107 | 1 |
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| 1935 | 75.8 | 25 | 85.7 | 41 | 65.9 | 15 | 7.91 | 13 | 0 |
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| 1934 | 75 | 37 | 85.9 | 38 | 64 | 43 | 3.97 | 69 | 1 |
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| 1933 | 73.5 | 70 | 85 | 56 | 61.8 | 82 | 5.61 | 37 | 2 |
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| 1932 | 72.5 | 84 | 83.5 | 81 | 61.5 | 87 | 2.09 | 95 | 0 |
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| 1931 | 75.6 | 28 | 85.4 | 48 | 65.8 | 16 | 8.92 | 6 | 0 |
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| 1930 | 74.1 | 55 | 85.7 | 41 | 62.6 | 72 | | | 1 |
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| 1929 | 73.5 | 70 | 86.1 | 29 | 61 | 92 | 1.83 | 98 | 0 |
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| 1928 | 75 | 37 | 85.9 | 38 | 64 | 43 | 6.68 | 22 | 1 |
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| 1927 | 73.3 | 73 | 84.1 | 70 | 62.6 | 72 | 3.04 | 80 | 0 |
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| 1926 | 74.1 | 55 | 85.2 | 53 | 63.1 | 62 | 7.04 | 18 | 1 |
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| 1925 | 72.1 | 95 | 82.5 | 90 | 61.7 | 84 | 5.98 | 29 | 0 |
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| 1924 | 73.1 | 78 | 84.7 | 62 | 61.5 | 87 | 3.80 | 72 | 0 |
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| 1923 | | | 85.7 | 41 | 61.8 | 82 | 2.46 | 88 | 4 |
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| 1922 | | | 83.9 | 78 | | | 4.08 | 66 | 4 |
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| 1919 | | | | | | | 7.61 | 15 | 31 |
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| 1918 | | | | | | | 2.57 | 86 | 31 |
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| 1917 | | | | | | | 5.27 | 47 | 31 |
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| 1916 | | | | | | | 9.88 | 2 | 31 |
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| 1915 | | | | | | | 4.34 | 60 | 31 |
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| 1914 | | | | | | | 5.20 | 49 | 31 |
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| 1913 | | | | | | | 3.64 | 74 | 31 |
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| 1912 | | | | | | | 2.85 | 84 | 31 |
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