Every May in Parkersburg, WV from 1926 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 | 61.3 | 69 | 72.5 | 66 | 50.1 | 70 | 5.72 | 14 | 0 |
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| 2025 | 61.1 | 71 | 71 | 82 | 51.3 | 57 | 5.07 | 22 | 0 |
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| 2024 | 67.5 | 10 | 78.4 | 18 | 56.6 | 9 | 2.45 | 73 | 0 |
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| 2023 | 61.1 | 71 | 73.6 | 54 | 48.6 | 86 | 2.84 | 67 | 0 |
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| 2022 | 65.7 | 22 | 77.2 | 25 | 54.1 | 23 | 4.16 | 35 | 1 |
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| 2021 | 60.6 | 77 | 73.1 | 58 | 48 | 91 | 3.82 | 42 | 0 |
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| 2020 | 60 | 82 | 70.9 | 83 | 49.2 | 81 | 8.49 | 2 | 0 |
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| 2019 | 66.6 | 17 | 77.1 | 27 | 56.1 | 12 | 3.24 | 58 | 0 |
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| 2018 | 71.2 | 1 | 82.6 | 3 | 59.8 | 1 | 4.40 | 33 | 0 |
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| 2017 | 63.3 | 46 | 73.6 | 54 | 52.9 | 34 | 2.59 | 71 | 0 |
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| 2016 | 61.8 | 61 | 72.9 | 61 | 50.8 | 60 | 3.81 | 44 | 0 |
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| 2015 | 67.2 | 13 | 80 | 8 | 54.3 | 21 | 1.90 | 81 | 0 |
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| 2013 | 63.8 | 40 | 75.4 | 38 | 52.2 | 42 | 2.98 | 63 | 0 |
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| 2012 | 68 | 7 | 79.1 | 12 | 56.8 | 8 | 5.90 | 13 | 0 |
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| 2011 | 64.3 | 35 | 74.2 | 50 | 54.4 | 20 | 3.24 | 58 | 0 |
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| 2010 | 65.5 | 26 | 76.9 | 31 | 54.2 | 22 | 7.72 | 5 | 0 |
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| 2009 | 63.4 | 45 | 74.7 | 44 | 52 | 46 | 4.07 | 38 | 0 |
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| 2008 | 59.2 | 92 | 70.9 | 83 | 47.6 | 92 | 4.75 | 30 | 0 |
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| 2007 | 65.7 | 22 | 80 | 8 | 51.5 | 52 | 0.60 | 96 | 0 |
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| 2006 | 60 | 82 | 72 | 71 | 48.1 | 90 | 2.54 | 72 | 0 |
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| 2005 | 58.1 | 95 | 71.5 | 76 | 44.7 | 97 | 2.28 | 75 | 0 |
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| 2004 | 67.3 | 12 | 78.9 | 14 | 55.6 | 14 | 4.81 | 27 | 0 |
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| 2003 | 61.6 | 62 | 70.6 | 86 | 52.6 | 38 | 5.43 | 16 | 0 |
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| 2002 | 59.4 | 91 | 71.6 | 75 | 47.2 | 93 | 3.81 | 44 | 0 |
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| 2001 | 62.4 | 55 | 73.9 | 52 | 50.8 | 60 | 6.61 | 10 | 0 |
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| 1997 | 56.5 | 97 | 67.8 | 97 | 45.2 | 96 | 4.15 | 36 | 0 |
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| 1996 | 61.6 | 62 | 71.5 | 76 | 51.6 | 50 | 7.11 | 7 | 0 |
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| 1995 | 62 | 59 | 72.7 | 65 | 51.4 | 55 | 8.11 | 4 | 0 |
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| 1994 | 57.7 | 96 | 69.9 | 91 | 45.6 | 95 | 3.42 | 52 | 0 |
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| 1993 | 63.1 | 49 | 75.5 | 37 | 50.6 | 63 | 2.24 | 76 | 0 |
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| 1992 | 60.8 | 75 | 72.2 | 68 | 49.4 | 78 | 3.73 | 48 | 0 |
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| 1991 | 70.3 | 3 | 81.5 | 5 | 59.1 | 2 | 1.81 | 84 | 0 |
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| 1990 | 59.8 | 87 | 69.4 | 94 | 50.2 | 69 | 8.40 | 3 | 0 |
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| 1989 | 58.9 | 93 | 68.5 | 96 | 49.3 | 79 | 4.91 | 25 | 0 |
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| 1988 | 62 | 59 | 74.6 | 46 | 49.5 | 75 | 1.70 | 86 | 0 |
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| 1987 | 66.5 | 18 | 79.5 | 11 | 53.5 | 29 | 1.89 | 82 | 0 |
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| 1986 | 64 | 38 | 74.3 | 48 | 53.6 | 28 | 1.79 | 85 | 0 |
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| 1985 | 66.1 | 19 | 77 | 29 | 55.2 | 15 | 5.08 | 21 | 0 |
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| 1984 | 60.5 | 78 | 70.4 | 88 | 50.6 | 63 | 4.01 | 39 | 0 |
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| 1983 | 60.1 | 80 | 70.6 | 86 | 49.5 | 75 | 7.06 | 8 | 0 |
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| 1982 | 69.2 | 5 | 81.8 | 4 | 56.6 | 9 | 5.28 | 18 | 0 |
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| 1981 | 60 | 82 | 71.2 | 81 | 48.9 | 84 | 4.54 | 32 | 0 |
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| 1980 | 63.7 | 42 | 74.9 | 43 | 52.5 | 39 | 4.25 | 34 | 0 |
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| 1979 | 62.1 | 56 | 73.8 | 53 | 50.5 | 66 | 5.34 | 17 | 0 |
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| 1978 | 61.4 | 67 | 70.8 | 85 | 51.9 | 47 | 3.25 | 57 | 0 |
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| 1977 | 67.4 | 11 | 80.3 | 7 | 54.6 | 17 | 1.36 | 89 | 0 |
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| 1976 | 60.7 | 76 | 71.9 | 73 | 49.5 | 75 | 2.77 | 69 | 0 |
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| 1975 | 66.7 | 16 | 77.5 | 22 | 55.9 | 13 | 5.01 | 24 | 0 |
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| 1974 | 62.9 | 50 | 72.9 | 61 | 53 | 33 | 6.12 | 12 | 0 |
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| 1973 | 60.9 | 73 | 69.8 | 93 | 51.9 | 47 | 3.35 | 55 | 0 |
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| 1972 | 63.8 | 40 | 75 | 41 | 52.7 | 35 | 2.07 | 80 | 0 |
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| 1971 | 59.9 | 86 | 71.3 | 78 | 48.6 | 86 | 3.82 | 42 | 0 |
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| 1970 | 66.8 | 15 | 78.8 | 15 | 54.9 | 16 | 2.16 | 77 | 0 |
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| 1969 | 64.4 | 34 | 76.5 | 32 | 52.2 | 42 | 2.15 | 78 | 0 |
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| 1968 | 60 | 82 | 69.9 | 91 | 50.1 | 70 | 10.00 | 1 | 0 |
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| 1967 | 58.8 | 94 | 69.2 | 95 | 48.5 | 88 | 6.94 | 9 | 0 |
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| 1966 | 60.4 | 79 | 72.5 | 66 | 48.3 | 89 | 0.82 | 95 | 0 |
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| 1965 | 69.1 | 6 | 80.9 | 6 | 57.2 | 6 | 1.22 | 91 | 0 |
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| 1964 | 65.5 | 26 | 77.8 | 21 | 53.2 | 32 | 1.10 | 93 | 0 |
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| 1963 | 61.6 | 62 | 73.3 | 57 | 49.9 | 72 | 0.99 | 94 | 0 |
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| 1962 | 70.3 | 3 | 82.7 | 2 | 57.8 | 5 | 2.88 | 65 | 0 |
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| 1961 | 59.5 | 89 | 72.2 | 68 | 46.9 | 94 | 3.40 | 53 | 0 |
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| 1960 | 60.9 | 73 | 71.3 | 78 | 50.5 | 66 | 3.06 | 61 | 0 |
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| 1959 | 68 | 7 | 79.7 | 10 | 56.3 | 11 | 3.30 | 56 | 0 |
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| 1958 | 62.5 | 54 | 74.1 | 51 | 50.8 | 60 | 4.81 | 27 | 0 |
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| 1957 | 64.6 | 31 | 77 | 29 | 52.3 | 41 | 4.10 | 37 | 2 |
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| 1956 | 62.7 | 53 | 74.7 | 44 | 50.6 | 63 | 5.22 | 19 | 0 |
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| 1955 | 65.5 | 26 | 77.3 | 24 | 53.7 | 26 | 2.35 | 74 | 0 |
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| 1954 | 60.1 | 80 | 71.3 | 78 | 49 | 82 | 3.13 | 60 | 0 |
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| 1953 | 68 | 7 | 79.1 | 12 | 56.9 | 7 | 3.06 | 61 | 0 |
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| 1952 | 63.3 | 46 | 74.5 | 47 | 52.1 | 44 | 3.78 | 46 | 0 |
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| 1951 | 64.9 | 30 | 77.1 | 27 | 52.7 | 35 | 2.85 | 66 | 0 |
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| 1950 | 64.3 | 35 | 75.1 | 40 | 53.5 | 29 | 3.85 | 41 | 0 |
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| 1949 | 64.5 | 32 | 77.4 | 23 | 51.7 | 49 | 2.93 | 64 | 0 |
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| 1948 | 62.1 | 56 | 73 | 59 | 51.3 | 57 | 2.79 | 68 | 0 |
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| 1947 | 61.4 | 67 | 73.5 | 56 | 49.3 | 79 | 3.59 | 49 | 0 |
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| 1946 | 62.8 | 52 | 72 | 71 | 53.3 | 31 | 4.66 | 31 | 1 |
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| 1945 | 59.5 | 89 | 70.2 | 90 | 48.9 | 84 | 5.21 | 20 | 0 |
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| 1944 | 71 | 2 | 83.1 | 1 | 58.9 | 3 | 3.55 | 50 | 0 |
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| 1943 | 65.1 | 29 | 75.7 | 36 | 54.5 | 18 | 5.53 | 15 | 0 |
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| 1942 | 64.5 | 32 | 75.2 | 39 | 53.7 | 26 | 3.87 | 40 | 0 |
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| 1941 | 64.3 | 35 | 78 | 20 | 50.5 | 66 | 3.37 | 54 | 0 |
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| 1940 | 61.5 | 66 | 73 | 59 | 49.9 | 72 | 3.77 | 47 | 0 |
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| 1939 | 66.1 | 19 | 78.4 | 18 | 53.8 | 25 | 0.53 | 97 | 0 |
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| 1938 | 62.9 | 50 | 74.3 | 48 | 51.5 | 52 | 4.81 | 27 | 0 |
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| 1937 | 63.2 | 48 | 75 | 41 | 51.5 | 52 | 3.49 | 51 | 0 |
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| 1936 | 65.6 | 25 | 78.7 | 17 | 52.5 | 39 | 1.46 | 87 | 0 |
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| 1935 | 59.7 | 88 | 70.4 | 88 | 49 | 82 | 6.41 | 11 | 0 |
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| 1934 | 65.8 | 21 | 78.8 | 15 | 52.7 | 35 | 2.09 | 79 | 0 |
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| 1933 | 67.1 | 14 | 75.9 | 35 | 58.2 | 4 | 7.50 | 6 | 0 |
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| 1932 | 63.9 | 39 | 76.3 | 33 | 51.6 | 50 | 1.22 | 91 | 0 |
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| 1931 | 62.1 | 56 | 72.1 | 70 | 52.1 | 44 | 4.82 | 26 | 0 |
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| 1930 | 65.7 | 22 | 77.2 | 25 | 54.1 | 23 | 1.29 | 90 | 0 |
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| 1929 | 61.6 | 62 | 71.8 | 74 | 51.4 | 55 | 5.02 | 23 | 0 |
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| 1928 | 61.3 | 69 | 72.9 | 61 | 49.6 | 74 | 1.84 | 83 | 0 |
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| 1927 | 63.7 | 42 | 72.9 | 61 | 54.5 | 18 | 2.76 | 70 | 0 |
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| 1926 | 63.7 | 42 | 76.3 | 33 | 51.2 | 59 | 1.41 | 88 | 0 |
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