Every April in Oak Ridge, TN from 1947 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 | 65.7 | 1 | 79.4 | 1 | 51.9 | 3 | 2.78 | 61 | 0 |
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| 2025 | 63.5 | 3 | 75 | 9 | 52.1 | 2 | 4.32 | 33 | 0 |
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| 2024 | 61.5 | 16 | 72 | 35 | 51 | 6 | 2.53 | 66 | 0 |
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| 2023 | 59.4 | 30 | 71.9 | 36 | 46.9 | 30 | 3.08 | 55 | 0 |
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| 2022 | 58.7 | 35 | 70.9 | 42 | 46.6 | 34 | 4.24 | 34 | 0 |
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| 2021 | 57.8 | 48 | 70.4 | 48 | 45.2 | 50 | 1.65 | 76 | 0 |
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| 2020 | 57.3 | 53 | 69.2 | 59 | 45.3 | 47 | 6.77 | 12 | 0 |
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| 2019 | 62.4 | 8 | 74.6 | 13 | 50.2 | 9 | 4.43 | 29 | 0 |
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| 2018 | 55.1 | 70 | 67.3 | 70 | 42.9 | 65 | 4.42 | 30 | 0 |
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| 2017 | 65.6 | 2 | 77.3 | 2 | 53.9 | 1 | 9.95 | 2 | 0 |
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| 2016 | 61.4 | 17 | 73.7 | 19 | 49 | 20 | 3.60 | 49 | 0 |
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| 2015 | 61.4 | 17 | 72.9 | 25 | 49.9 | 12 | 6.77 | 12 | 0 |
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| 2014 | 61.3 | 19 | 73.8 | 16 | 48.8 | 21 | 4.44 | 28 | 0 |
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| 2013 | 58.6 | 37 | 70.9 | 42 | 46.3 | 37 | 6.37 | 16 | 0 |
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| 2012 | 61.6 | 14 | 73.7 | 19 | 49.5 | 14 | 3.10 | 54 | 0 |
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| 2011 | 62.1 | 9 | 74.8 | 10 | 49.4 | 15 | 9.13 | 6 | 0 |
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| 2010 | 62 | 10 | 75.6 | 5 | 48.4 | 23 | 2.94 | 57 | 0 |
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| 2009 | 58.4 | 40 | 70.6 | 45 | 46.2 | 38 | 3.81 | 42 | 0 |
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| 2008 | 59.4 | 30 | 70.2 | 51 | 48.6 | 22 | 3.61 | 47 | 0 |
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| 2007 | 56.1 | 63 | 67.6 | 66 | 44.6 | 55 | 5.31 | 20 | 0 |
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| 2006 | 63.3 | 4 | 75.4 | 6 | 51.3 | 4 | 7.66 | 9 | 0 |
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| 2005 | 58.2 | 42 | 69.7 | 55 | 46.8 | 32 | 6.28 | 17 | 0 |
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| 2004 | 58.6 | 37 | 70.6 | 45 | 46.7 | 33 | 3.33 | 52 | 0 |
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| 2003 | 60.9 | 23 | 72.5 | 27 | 49.4 | 15 | 8.03 | 8 | 0 |
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| 2002 | 61.8 | 12 | 73.9 | 15 | 49.6 | 13 | 1.76 | 74 | 0 |
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| 2001 | 61.7 | 13 | 73.2 | 23 | 50.2 | 9 | 2.16 | 71 | 0 |
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| 2000 | 56.4 | 60 | 67.5 | 67 | 45.3 | 47 | 7.28 | 10 | 0 |
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| 1999 | 62 | 10 | 72.7 | 26 | 51.2 | 5 | 3.68 | 46 | 0 |
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| 1998 | 57.6 | 50 | 69 | 61 | 46.2 | 38 | 14.03 | 1 | 0 |
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| 1997 | 54.8 | 73 | 67.7 | 65 | 41.9 | 72 | 3.99 | 36 | 0 |
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| 1996 | 55.1 | 70 | 69.3 | 56 | 40.9 | 75 | 3.95 | 37 | 0 |
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| 1995 | 59.8 | 27 | 74.2 | 14 | 45.4 | 46 | 2.49 | 67 | 0 |
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| 1994 | 59.7 | 28 | 74.7 | 12 | 44.6 | 55 | 9.81 | 3 | 0 |
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| 1993 | 56 | 64 | 68.9 | 62 | 42.4 | 69 | 3.70 | 44 | 2 |
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| 1992 | 58.5 | 39 | 72.2 | 29 | 44.7 | 54 | 1.64 | 78 | 0 |
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| 1991 | 62.8 | 7 | 75.4 | 6 | 50.2 | 9 | 3.84 | 41 | 0 |
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| 1990 | 56.2 | 61 | 70.2 | 51 | 42.2 | 70 | 2.57 | 65 | 0 |
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| 1989 | 57.9 | 47 | 70.8 | 44 | 45 | 53 | 2.76 | 62 | 0 |
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| 1988 | 58.2 | 42 | 72.1 | 32 | 44.4 | 57 | 3.42 | 50 | 0 |
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| 1987 | 56.6 | 59 | 69.3 | 56 | 44 | 60 | 2.97 | 56 | 0 |
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| 1986 | 58.3 | 41 | 73.7 | 19 | 42.9 | 65 | 1.73 | 75 | 0 |
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| 1985 | 57.3 | 53 | 72.1 | 32 | 42.5 | 68 | 2.23 | 70 | 0 |
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| 1984 | 54.7 | 74 | 66.6 | 71 | 42.8 | 67 | 4.16 | 35 | 0 |
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| 1983 | 51.2 | 78 | 63.6 | 78 | 38.8 | 79 | 6.40 | 15 | 0 |
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| 1982 | 52.6 | 77 | 65 | 75 | 40.2 | 76 | 2.79 | 60 | 0 |
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| 1981 | 61.2 | 20 | 75.3 | 8 | 47.1 | 27 | 4.58 | 25 | 0 |
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| 1980 | 55.4 | 67 | 69.8 | 54 | 41 | 74 | 3.89 | 39 | 0 |
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| 1979 | 57.2 | 55 | 70.3 | 50 | 44.1 | 59 | 5.25 | 21 | 0 |
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| 1978 | 57.2 | 55 | 71.2 | 41 | 43.1 | 64 | 3.21 | 53 | 0 |
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| 1977 | 59.2 | 33 | 73.3 | 22 | 45.1 | 51 | 8.50 | 7 | 0 |
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| 1976 | 56.2 | 61 | 72.4 | 28 | 40 | 77 | 0.88 | 80 | 0 |
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| 1975 | 54.9 | 72 | 68.4 | 64 | 41.4 | 73 | 2.36 | 68 | 0 |
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| 1974 | 57.7 | 49 | 70.2 | 51 | 45.1 | 51 | 3.78 | 43 | 0 |
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| 1973 | 55.4 | 67 | 64.8 | 76 | 45.9 | 40 | 5.66 | 18 | 0 |
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| 1972 | 58 | 46 | 70.4 | 48 | 45.6 | 43 | 2.94 | 57 | 0 |
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| 1971 | 57.6 | 50 | 71.9 | 36 | 43.3 | 63 | 4.73 | 24 | 0 |
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| 1970 | 60.3 | 26 | 73 | 24 | 47.6 | 26 | 9.24 | 5 | 0 |
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| 1969 | 59.4 | 30 | 71.9 | 36 | 46.9 | 30 | 2.86 | 59 | 0 |
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| 1968 | 58.2 | 42 | 69.2 | 59 | 47.1 | 27 | 5.21 | 22 | 0 |
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| 1967 | 61.2 | 20 | 74.8 | 10 | 47.7 | 25 | 2.62 | 64 | 0 |
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| 1966 | 56.9 | 58 | 67.4 | 69 | 46.5 | 35 | 5.50 | 19 | 0 |
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| 1965 | 60.7 | 24 | 72.2 | 29 | 49.1 | 19 | 3.86 | 40 | 0 |
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| 1964 | 60.7 | 24 | 71.9 | 36 | 49.4 | 15 | 7.13 | 11 | 0 |
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| 1963 | 59.6 | 29 | 72.1 | 32 | 47.1 | 27 | 3.70 | 44 | 0 |
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| 1962 | 53.9 | 75 | 65.6 | 74 | 42.1 | 71 | 3.94 | 38 | 0 |
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| 1961 | 53.9 | 75 | 64.3 | 77 | 43.4 | 62 | 3.61 | 47 | 0 |
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| 1960 | 58.7 | 35 | 72.2 | 29 | 45.3 | 47 | 2.09 | 72 | 0 |
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| 1959 | 59 | 34 | 71.5 | 40 | 46.5 | 35 | 4.35 | 32 | 0 |
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| 1958 | 57.5 | 52 | 69.3 | 56 | 45.8 | 42 | 6.62 | 14 | 0 |
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| 1957 | 61.6 | 14 | 73.8 | 16 | 49.4 | 15 | 4.55 | 26 | 0 |
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| 1956 | 57.2 | 55 | 68.6 | 63 | 45.9 | 40 | 9.71 | 4 | 0 |
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| 1955 | 61.1 | 22 | 73.8 | 16 | 48.4 | 23 | 4.45 | 27 | 0 |
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| 1954 | 63.2 | 6 | 76.2 | 3 | 50.3 | 8 | 1.80 | 73 | 0 |
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| 1953 | 55.6 | 66 | 67.5 | 67 | 43.8 | 61 | 3.35 | 51 | 0 |
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| 1952 | 58.1 | 45 | 70.6 | 45 | 45.6 | 43 | 1.65 | 76 | 0 |
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| 1951 | 55.4 | 67 | 66.3 | 72 | 44.4 | 57 | 4.86 | 23 | 0 |
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| 1950 | 51 | 79 | 62.9 | 79 | 39.1 | 78 | 1.39 | 79 | 0 |
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| 1949 | 55.9 | 65 | 66.2 | 73 | 45.5 | 45 | 4.39 | 31 | 0 |
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| 1948 | 63.3 | 4 | 75.8 | 4 | 50.7 | 7 | 2.25 | 69 | 2 |
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| 1947 | | | | | | | 2.73 | 63 | 30 |
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