Every May in Bristol-Johnson City, TN from 1938 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 | 64.5 | 44 | 78.5 | 26 | 50.5 | 62 | 2.86 | 50 | 0 |
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| 2025 | 64 | 50 | 74.6 | 63 | 53.5 | 32 | 4.51 | 26 | 0 |
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| 2024 | 67.2 | 18 | 78.1 | 30 | 56.3 | 9 | 4.93 | 20 | 0 |
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| 2023 | 64 | 50 | 75.9 | 51 | 52.2 | 48 | 3.75 | 44 | 0 |
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| 2022 | 67.5 | 17 | 80.2 | 15 | 54.8 | 18 | 6.14 | 12 | 0 |
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| 2021 | 63.4 | 56 | 76.3 | 47 | 50.5 | 62 | 2.24 | 70 | 0 |
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| 2020 | 61.5 | 71 | 73.2 | 73 | 49.8 | 71 | 4.38 | 29 | 0 |
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| 2019 | 69.3 | 4 | 81.9 | 4 | 56.7 | 8 | 2.80 | 52 | 0 |
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| 2018 | 69.7 | 2 | 81.4 | 6 | 58.1 | 2 | 7.85 | 3 | 0 |
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| 2017 | 65 | 36 | 75.6 | 53 | 54.4 | 23 | 7.78 | 4 | 0 |
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| 2016 | 64 | 50 | 75.5 | 56 | 52.6 | 41 | 3.98 | 38 | 0 |
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| 2015 | 68.5 | 9 | 82.8 | 3 | 54.1 | 27 | 0.70 | 89 | 0 |
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| 2014 | 65.9 | 29 | 79.6 | 20 | 52.1 | 50 | 2.20 | 71 | 0 |
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| 2013 | 63.2 | 57 | 74.8 | 62 | 51.5 | 57 | 4.09 | 35 | 0 |
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| 2012 | 68.5 | 9 | 80.9 | 9 | 56 | 10 | 2.07 | 75 | 0 |
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| 2011 | 65 | 36 | 76.9 | 38 | 53.1 | 34 | 5.93 | 13 | 0 |
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| 2010 | 67.6 | 15 | 80.1 | 17 | 55.2 | 14 | 2.58 | 56 | 0 |
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| 2009 | 64.7 | 39 | 75.6 | 53 | 53.9 | 29 | 4.58 | 25 | 0 |
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| 2008 | 62.6 | 66 | 75.3 | 58 | 50 | 65 | 1.50 | 85 | 0 |
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| 2007 | 66 | 27 | 80.8 | 11 | 51.2 | 59 | 0.76 | 88 | 0 |
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| 2006 | 61.4 | 72 | 73.6 | 69 | 49.3 | 75 | 2.29 | 67 | 0 |
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| 2005 | 60.7 | 80 | 73.5 | 71 | 48 | 86 | 2.26 | 69 | 0 |
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| 2004 | 68.1 | 12 | 80.4 | 13 | 55.8 | 12 | 3.91 | 40 | 0 |
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| 2003 | 64.2 | 47 | 74.1 | 68 | 54.3 | 25 | 5.32 | 16 | 0 |
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| 2002 | 62.4 | 68 | 75.4 | 57 | 49.5 | 72 | 2.39 | 61 | 0 |
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| 2001 | 65.1 | 35 | 77.9 | 31 | 52.4 | 44 | 4.05 | 36 | 0 |
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| 2000 | 66.2 | 24 | 79.5 | 21 | 53 | 37 | 3.19 | 48 | 0 |
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| 1999 | 63.2 | 57 | 77.4 | 33 | 49.1 | 77 | 2.37 | 63 | 0 |
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| 1998 | 66 | 27 | 77.1 | 35 | 54.8 | 18 | 4.94 | 19 | 0 |
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| 1997 | 58.2 | 88 | 71.3 | 85 | 45.2 | 89 | 4.80 | 23 | 0 |
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| 1996 | 64.7 | 39 | 76.4 | 46 | 53.1 | 34 | 6.76 | 7 | 0 |
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| 1995 | 64.7 | 39 | 76.5 | 41 | 52.9 | 38 | 6.19 | 11 | 0 |
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| 1994 | 60.7 | 80 | 73.1 | 74 | 48.4 | 82 | 3.90 | 41 | 0 |
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| 1993 | 64.7 | 39 | 76.5 | 41 | 52.9 | 38 | 3.42 | 45 | 0 |
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| 1992 | 61.1 | 77 | 71.8 | 82 | 50.5 | 62 | 5.46 | 15 | 0 |
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| 1991 | 69.5 | 3 | 80.9 | 9 | 58.2 | 1 | 2.10 | 74 | 0 |
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| 1990 | 63.7 | 54 | 74.3 | 65 | 53.1 | 34 | 6.57 | 8 | 0 |
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| 1989 | 59.8 | 84 | 70.5 | 87 | 49 | 79 | 4.10 | 34 | 0 |
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| 1988 | 62.2 | 70 | 76.2 | 48 | 48.3 | 83 | 2.48 | 58 | 0 |
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| 1987 | 69.3 | 4 | 81.6 | 5 | 56.9 | 7 | 1.62 | 81 | 0 |
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| 1986 | 64.7 | 39 | 75.7 | 52 | 53.8 | 30 | 4.16 | 33 | 0 |
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| 1985 | 63.7 | 54 | 75 | 60 | 52.5 | 43 | 2.85 | 51 | 0 |
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| 1984 | 59.4 | 86 | 71.5 | 83 | 47.3 | 88 | 7.42 | 5 | 0 |
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| 1983 | 60.8 | 79 | 72.5 | 79 | 49.2 | 76 | 4.83 | 21 | 0 |
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| 1982 | 68.2 | 11 | 81.1 | 7 | 55.2 | 14 | 2.55 | 57 | 0 |
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| 1981 | 61.3 | 74 | 72.7 | 78 | 49.9 | 68 | 4.51 | 26 | 0 |
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| 1980 | 64.2 | 47 | 76.5 | 41 | 51.9 | 53 | 2.69 | 54 | 0 |
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| 1979 | 63.8 | 53 | 75.1 | 59 | 52.4 | 44 | 3.35 | 46 | 0 |
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| 1978 | 62.3 | 69 | 73.3 | 72 | 51.3 | 58 | 4.50 | 28 | 0 |
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| 1977 | 66.8 | 20 | 79.5 | 21 | 54.1 | 27 | 1.91 | 79 | 0 |
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| 1976 | 61.2 | 75 | 72.9 | 77 | 49.5 | 72 | 3.31 | 47 | 0 |
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| 1975 | 67.1 | 19 | 77 | 37 | 57.2 | 6 | 4.29 | 31 | 0 |
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| 1974 | 64.3 | 46 | 74.3 | 65 | 54.3 | 25 | 8.66 | 2 | 0 |
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| 1973 | 60.7 | 80 | 71.4 | 84 | 49.9 | 68 | 6.46 | 9 | 0 |
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| 1972 | 62.7 | 65 | 73.6 | 69 | 51.8 | 54 | 5.92 | 14 | 0 |
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| 1971 | 61.4 | 72 | 73 | 75 | 49.9 | 68 | 4.38 | 29 | 0 |
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| 1970 | 66.1 | 25 | 79.2 | 23 | 52.9 | 38 | 1.60 | 82 | 0 |
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| 1969 | 63 | 59 | 76.9 | 38 | 49.1 | 77 | 2.06 | 76 | 0 |
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| 1968 | 61.2 | 75 | 72.5 | 79 | 50 | 65 | 3.83 | 43 | 0 |
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| 1967 | 58.7 | 87 | 69.4 | 88 | 48 | 86 | 6.29 | 10 | 0 |
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| 1966 | 62.9 | 61 | 74.5 | 64 | 51.2 | 59 | 1.31 | 86 | 0 |
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| 1965 | 68.1 | 12 | 80.3 | 14 | 55.9 | 11 | 2.75 | 53 | 0 |
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| 1964 | 65.9 | 29 | 78.3 | 28 | 53.4 | 33 | 2.27 | 68 | 0 |
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| 1963 | 64.2 | 47 | 76.5 | 41 | 51.8 | 54 | 4.64 | 24 | 0 |
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| 1962 | 71.2 | 1 | 84.8 | 1 | 57.6 | 4 | 1.69 | 80 | 0 |
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| 1961 | 61 | 78 | 73 | 75 | 49 | 79 | 2.31 | 65 | 0 |
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| 1960 | 62.9 | 61 | 75 | 60 | 50.8 | 61 | 2.06 | 76 | 0 |
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| 1959 | 68.7 | 8 | 79.7 | 19 | 57.6 | 4 | 2.33 | 64 | 0 |
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| 1958 | 65.5 | 31 | 77.1 | 35 | 53.8 | 30 | 7.34 | 6 | 0 |
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| 1957 | 67.7 | 14 | 81 | 8 | 54.5 | 21 | 2.39 | 61 | 0 |
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| 1956 | 66.7 | 21 | 78.6 | 25 | 54.9 | 17 | 3.18 | 49 | 0 |
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| 1955 | 67.6 | 15 | 79.9 | 18 | 55.2 | 14 | 2.14 | 73 | 0 |
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| 1954 | 59.7 | 85 | 71.3 | 85 | 48.1 | 85 | 2.62 | 55 | 0 |
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| 1953 | 69.3 | 4 | 80.8 | 11 | 57.8 | 3 | 5.02 | 18 | 0 |
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| 1952 | 64.9 | 38 | 77.5 | 32 | 52.3 | 46 | 2.03 | 78 | 0 |
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| 1951 | 62.8 | 63 | 75.6 | 53 | 50 | 65 | 4.81 | 22 | 0 |
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| 1950 | 66.5 | 23 | 77.2 | 34 | 55.7 | 13 | 9.71 | 1 | 0 |
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| 1949 | 65.4 | 34 | 78.5 | 26 | 52.2 | 48 | 2.31 | 65 | 0 |
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| 1948 | 64.5 | 44 | 76.8 | 40 | 52.1 | 50 | 2.47 | 59 | 0 |
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| 1947 | 62.8 | 63 | 76.2 | 48 | 49.5 | 72 | 2.43 | 60 | 0 |
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| 1946 | 63 | 59 | 74.2 | 67 | 51.7 | 56 | 4.22 | 32 | 0 |
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| 1945 | 60.1 | 83 | 71.9 | 81 | 48.3 | 83 | 3.95 | 39 | 0 |
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| 1944 | 69.1 | 7 | 83.4 | 2 | 54.8 | 18 | 1.54 | 84 | 0 |
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| 1943 | 66.7 | 21 | 78.9 | 24 | 54.5 | 21 | 3.84 | 42 | 0 |
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| 1942 | 65.5 | 31 | 78.3 | 28 | 52.6 | 41 | 3.99 | 37 | 0 |
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| 1941 | 66.1 | 25 | 80.2 | 15 | 52.1 | 50 | 1.58 | 83 | 0 |
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| 1940 | 62.6 | 66 | 76.1 | 50 | 48.7 | 81 | 2.16 | 72 | 2 |
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| 1939 | | | | | 52.3 | 46 | 0.95 | 87 | 10 |
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| 1938 | 65.5 | 31 | 76.5 | 41 | 54.4 | 23 | 5.25 | 17 | 1 |
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