Every 1 September to 10 October in Georgetown, DE from 1945 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 | 69.4 | 12 | 77.6 | 40 | 61.2 | 3 | 6.03 | 28 | 0 |
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| 2025 | 67.8 | 32 | 77.3 | 48 | 58.3 | 25 | 3.65 | 55 | 0 |
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| 2024 | 68.4 | 21 | 77.5 | 42 | 59.3 | 13 | 0.29 | 80 | 0 |
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| 2023 | 68.7 | 16 | 78.2 | 27 | 59.2 | 14 | 7.64 | 7 | 0 |
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| 2022 | 67.3 | 35 | 77.2 | 50 | 57.3 | 31 | 7.14 | 12 | 0 |
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| 2021 | 70.5 | 6 | 80.4 | 9 | 60.6 | 7 | 3.48 | 57 | 0 |
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| 2020 | 68 | 30 | 77.4 | 46 | 58.5 | 23 | 3.93 | 51 | 0 |
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| 2019 | 71.3 | 3 | 81.5 | 5 | 61.1 | 5 | 1.35 | 78 | 0 |
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| 2018 | 75.1 | 1 | 82.5 | 3 | 67.8 | 1 | 6.62 | 18 | 0 |
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| 2017 | 70.4 | 7 | 79.7 | 12 | 61.2 | 3 | 2.22 | 67 | 0 |
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| 2016 | 70.2 | 8 | 77.8 | 36 | 62.7 | 2 | 15.30 | 1 | 0 |
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| 2015 | 69.3 | 13 | 78.3 | 24 | 60.3 | 9 | 6.28 | 24 | 0 |
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| 2014 | 68 | 30 | 77.6 | 40 | 58.4 | 24 | 4.61 | 42 | 0 |
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| 2013 | 68.2 | 27 | 78.9 | 18 | 57.5 | 29 | 3.46 | 58 | 0 |
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| 2012 | 68.4 | 21 | 77.9 | 33 | 58.8 | 20 | 3.54 | 56 | 0 |
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| 2011 | 68.6 | 17 | 77.5 | 42 | 59.8 | 10 | 3.36 | 60 | 0 |
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| 2010 | 69 | 14 | 79.7 | 12 | 58.2 | 26 | 6.42 | 20 | 0 |
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| 2009 | 68.8 | 15 | 77.9 | 33 | 59.7 | 11 | 5.69 | 32 | 0 |
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| 2008 | 68.5 | 19 | 78.1 | 29 | 58.9 | 17 | 5.90 | 29 | 0 |
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| 2007 | 70.8 | 5 | 81.9 | 4 | 59.6 | 12 | 1.46 | 76 | 0 |
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| 2006 | 65.5 | 53 | 74.7 | 75 | 56.3 | 37 | 9.80 | 4 | 0 |
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| 2005 | 71 | 4 | 82.7 | 2 | 59.2 | 14 | 5.39 | 37 | 0 |
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| 2004 | 68.6 | 17 | 78.3 | 24 | 58.8 | 20 | 2.21 | 69 | 0 |
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| 2003 | 66.3 | 45 | 75.6 | 65 | 57.1 | 32 | 6.04 | 27 | 0 |
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| 2002 | 70.1 | 9 | 79.6 | 14 | 60.6 | 7 | 9.24 | 5 | 0 |
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| 2001 | 63.9 | 73 | 74.7 | 75 | 53.1 | 65 | 2.09 | 71 | 0 |
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| 2000 | 64.9 | 64 | 74.3 | 79 | 55.5 | 43 | 6.13 | 26 | 0 |
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| 1999 | 66.4 | 41 | 75.3 | 69 | 57.6 | 28 | 10.41 | 3 | 0 |
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| 1998 | 68.4 | 21 | 78.6 | 19 | 58.2 | 26 | 6.80 | 15 | 0 |
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| 1996 | 65.6 | 51 | 75.7 | 64 | 55.6 | 42 | 10.43 | 2 | 0 |
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| 1995 | 68.1 | 28 | 79.2 | 17 | 56.9 | 33 | 5.55 | 36 | 0 |
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| 1994 | 63.5 | 75 | 75.4 | 68 | 51.6 | 76 | 4.03 | 48 | 0 |
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| 1993 | 66.3 | 45 | 77.7 | 38 | 54.9 | 50 | 4.26 | 46 | 0 |
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| 1992 | 64.8 | 66 | 74.9 | 71 | 54.6 | 55 | 5.68 | 33 | 0 |
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| 1991 | 65.3 | 57 | 77.7 | 38 | 52.9 | 67 | 4.89 | 41 | 0 |
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| 1990 | 65.5 | 53 | 77.3 | 48 | 53.8 | 61 | 1.77 | 75 | 0 |
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| 1989 | 65.9 | 50 | 76 | 61 | 55.8 | 40 | 5.81 | 30 | 0 |
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| 1988 | 63.4 | 78 | 74.9 | 71 | 51.8 | 74 | 3.23 | 62 | 0 |
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| 1987 | 66 | 49 | 77.1 | 51 | 54.9 | 50 | 5.01 | 39 | 0 |
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| 1986 | 67.2 | 36 | 78.2 | 27 | 56.2 | 38 | 1.80 | 74 | 0 |
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| 1985 | 66.6 | 39 | 78 | 31 | 55.3 | 45 | 7.33 | 10 | 0 |
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| 1984 | 63.5 | 75 | 75.9 | 62 | 51.2 | 78 | 2.65 | 66 | 0 |
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| 1983 | 66.7 | 38 | 78.6 | 19 | 54.8 | 52 | 6.30 | 22 | 0 |
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| 1982 | 66.3 | 45 | 78.3 | 24 | 54.3 | 57 | 2.04 | 73 | 0 |
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| 1981 | 64.2 | 72 | 75.5 | 67 | 53 | 66 | 3.98 | 49 | 0 |
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| 1980 | 68.1 | 28 | 79.4 | 15 | 56.9 | 33 | 4.08 | 47 | 0 |
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| 1979 | 66.2 | 48 | 76.5 | 57 | 56 | 39 | 6.44 | 19 | 0 |
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| 1978 | 64.7 | 69 | 77.1 | 51 | 52.4 | 70 | 0.73 | 79 | 0 |
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| 1977 | 67.6 | 33 | 77.9 | 33 | 57.4 | 30 | 7.34 | 9 | 0 |
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| 1976 | 65.2 | 58 | 75.9 | 62 | 54.4 | 56 | 7.12 | 13 | 0 |
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| 1975 | 64.8 | 66 | 74.8 | 74 | 54.8 | 52 | 9.20 | 6 | 0 |
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| 1974 | 63.4 | 78 | 74.5 | 78 | 52.3 | 71 | 3.88 | 54 | 0 |
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| 1973 | 68.3 | 26 | 79.8 | 10 | 56.9 | 33 | 3.92 | 52 | 0 |
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| 1972 | 65 | 63 | 74.7 | 75 | 55.2 | 48 | 6.94 | 14 | 0 |
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| 1971 | 68.4 | 21 | 77.8 | 36 | 58.9 | 17 | 5.65 | 34 | 0 |
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| 1970 | 68.4 | 21 | 81.5 | 5 | 55.3 | 45 | 1.36 | 77 | 0 |
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| 1969 | 65.5 | 53 | 77.4 | 46 | 53.6 | 62 | 2.22 | 67 | 0 |
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| 1968 | 64.9 | 64 | 78.6 | 19 | 51.2 | 78 | 2.76 | 65 | 0 |
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| 1967 | 64.4 | 71 | 76.3 | 58 | 52.5 | 69 | 4.55 | 43 | 1 |
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| 1966 | 63.6 | 74 | 75.3 | 69 | 52.1 | 73 | 6.80 | 15 | 1 |
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| 1965 | 66.6 | 39 | 78.1 | 29 | 55.1 | 49 | 2.92 | 64 | 0 |
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| 1964 | 65.4 | 56 | 76.9 | 55 | 53.9 | 60 | 6.63 | 17 | 0 |
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| 1963 | 63.5 | 75 | 75.6 | 65 | 51.3 | 77 | 4.95 | 40 | 0 |
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| 1962 | 65.2 | 58 | 76.2 | 59 | 54.3 | 57 | 3.36 | 60 | 0 |
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| 1961 | 70 | 10 | 81.1 | 7 | 58.9 | 17 | 6.30 | 22 | 0 |
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| 1960 | 66.4 | 41 | 77 | 54 | 55.8 | 40 | 7.36 | 8 | 0 |
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| 1959 | 71.7 | 2 | 82.8 | 1 | 60.7 | 6 | 2.09 | 71 | 0 |
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| 1958 | 64.8 | 66 | 77.5 | 42 | 52.3 | 71 | 3.41 | 59 | 2 |
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| 1957 | 68.5 | 19 | 78 | 31 | 59 | 16 | 6.37 | 21 | 0 |
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| 1956 | 65.6 | 51 | 76.6 | 56 | 54.7 | 54 | 4.27 | 45 | 0 |
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| 1955 | 67.5 | 34 | 78.4 | 23 | 56.6 | 36 | 4.46 | 44 | 0 |
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| 1954 | 69.6 | 11 | 80.7 | 8 | 58.6 | 22 | 5.74 | 31 | 0 |
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| 1953 | 66.4 | 41 | 79.4 | 15 | 53.4 | 63 | 3.07 | 63 | 0 |
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| 1952 | 65.1 | 62 | 78.5 | 22 | 51.7 | 75 | 2.10 | 70 | 0 |
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| 1951 | 67 | 37 | 79.8 | 10 | 54.2 | 59 | 5.19 | 38 | 0 |
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| 1950 | 65.2 | 58 | 74.9 | 71 | 55.5 | 43 | 6.24 | 25 | 0 |
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| 1949 | 65.2 | 58 | 77.1 | 51 | 53.3 | 64 | 3.92 | 52 | 1 |
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| 1948 | 64.5 | 70 | 76.2 | 59 | 52.8 | 68 | 7.22 | 11 | 0 |
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| 1947 | 66.4 | 41 | 77.5 | 42 | 55.3 | 45 | 5.64 | 35 | 0 |
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| 1946 | | | | | | | 3.94 | 50 | 13 |
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| 1945 | | | | | | | | | 20 |
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