Every August in Hayward, WI from 1893 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 | 65.2 | 29 | 78.4 | 30 | 52 | 34 | | | 0 |
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| 2025 | 64.7 | 33 | 76 | 43 | 53.4 | 21 | | | 2 |
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| 2024 | | | | | | | 6.03 | 24 | 4 |
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| 2023 | 65 | 30 | 78.1 | 33 | 51.8 | 36 | 1.97 | 95 | 1 |
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| 2022 | 65.4 | 27 | 77.3 | 39 | 53.6 | 17 | 4.06 | 56 | 0 |
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| 2021 | 66.6 | 17 | 79.6 | 22 | 53.6 | 17 | 1.61 | 101 | 0 |
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| 2020 | 66 | 21 | 77.8 | 36 | 54.2 | 12 | 6.62 | 15 | 0 |
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| 2019 | 63.3 | 40 | 76 | 43 | 50.6 | 41 | 3.35 | 68 | 0 |
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| 2018 | 66.2 | 19 | 78.6 | 27 | 53.7 | 14 | 5.92 | 27 | 0 |
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| 2017 | 61.3 | 47 | 72.5 | 54 | 50.1 | 44 | 6.64 | 14 | 0 |
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| 2016 | 67.3 | 11 | 78.1 | 33 | 56.6 | 5 | 3.80 | 62 | 0 |
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| 2015 | 64.3 | 35 | 75.2 | 47 | 53.5 | 20 | 5.96 | 25 | 0 |
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| 2014 | 65.8 | 25 | 76.2 | 42 | 55.3 | 8 | 7.00 | 9 | 0 |
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| 2013 | 65.3 | 28 | 80.2 | 15 | 50.4 | 43 | 5.65 | 30 | 1 |
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| 2012 | 63.5 | 38 | 78.4 | 30 | 48.7 | 51 | 2.05 | 94 | 0 |
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| 2011 | 65 | 30 | 78 | 35 | 52.1 | 33 | 7.13 | 8 | 0 |
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| 2010 | 69.2 | 3 | 80.6 | 13 | 57.9 | 2 | 6.37 | 21 | 0 |
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| 2009 | 61.5 | 46 | 75 | 48 | 48 | 52 | 2.68 | 77 | 0 |
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| 2008 | 67.4 | 9 | 81.5 | 8 | 53.3 | 22 | 2.17 | 89 | 3 |
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| 2007 | 68 | 7 | 81.5 | 8 | 54.6 | 10 | 3.48 | 67 | 0 |
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| 2006 | 70 | 2 | 83.1 | 3 | 56.9 | 4 | 2.97 | 73 | 1 |
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| 2005 | 68.2 | 5 | 82.5 | 4 | 53.9 | 13 | 0.53 | 112 | 0 |
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| 2004 | 59.8 | 48 | 72.5 | 54 | 47.2 | 53 | 3.59 | 66 | 0 |
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| 2003 | 67.1 | 12 | 81.1 | 10 | 53.2 | 23 | 0.83 | 108 | 0 |
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| 2002 | 64.3 | 35 | 75.8 | 46 | 52.7 | 27 | 2.73 | 76 | 0 |
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| 2001 | 66 | 21 | 79.4 | 23 | 52.5 | 29 | 1.79 | 98 | 3 |
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| 2000 | 65 | 30 | 77.3 | 39 | 52.8 | 26 | 4.28 | 51 | 0 |
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| 1999 | 63.5 | 38 | 74.8 | 49 | 52.2 | 31 | 7.34 | 7 | 0 |
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| 1998 | 65.9 | 23 | 79.8 | 18 | 51.9 | 35 | 2.63 | 78 | 0 |
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| 1997 | | | | | | | 3.22 | 69 | 31 |
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| 1996 | | | | | | | 2.17 | 89 | 31 |
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| 1995 | | | | | | | 6.83 | 12 | 31 |
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| 1994 | | | | | | | 4.75 | 41 | 31 |
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| 1993 | | | | | | | 2.33 | 85 | 31 |
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| 1992 | | | | | | | 2.81 | 75 | 31 |
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| 1991 | | | | | | | 2.09 | 93 | 31 |
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| 1990 | | | | | | | 3.73 | 64 | 31 |
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| 1989 | | | | | | | 6.58 | 16 | 31 |
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| 1988 | | | | | | | 6.75 | 13 | 31 |
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| 1986 | | | | | | | 3.90 | 59 | 31 |
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| 1985 | | | | | | | 6.49 | 18 | 31 |
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| 1984 | | | | | | | 4.97 | 36 | 31 |
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| 1983 | | | | | | | 6.54 | 17 | 31 |
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| 1982 | | | | | | | 3.78 | 63 | 31 |
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| 1981 | | | | | | | 6.94 | 11 | 31 |
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| 1980 | | | | | | | 4.65 | 44 | 31 |
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| 1979 | | | | | | | 2.35 | 84 | 31 |
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| 1978 | | | | | | | 7.59 | 5 | 31 |
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| 1977 | | | | | | | 5.63 | 32 | 31 |
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| 1976 | | | | | | | 1.07 | 106 | 31 |
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| 1975 | | | | | | | 4.11 | 54 | 31 |
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| 1974 | | | | | | | 4.09 | 55 | 31 |
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| 1973 | 68.2 | 5 | 79.3 | 24 | 57 | 3 | 5.63 | 32 | 0 |
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| 1972 | | | | | | | 6.44 | 19 | 31 |
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| 1971 | | | | | | | 4.02 | 57 | 31 |
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| 1970 | | | | | | | 1.35 | 104 | 31 |
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| 1969 | | | | | | | 1.62 | 100 | 31 |
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| 1968 | | | | | | | 2.37 | 83 | 31 |
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| 1967 | | | | | | | 5.31 | 35 | 31 |
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| 1966 | 63 | 41 | 74.8 | 49 | 51.1 | 39 | 7.75 | 3 | 0 |
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| 1965 | | | | | | | 2.93 | 74 | 31 |
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| 1964 | | | | | | | 4.29 | 50 | 31 |
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| 1963 | | | | | | | 4.18 | 52 | 31 |
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| 1962 | | | | | | | 4.87 | 37 | 31 |
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| 1961 | | | | | | | 1.28 | 105 | 31 |
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| 1960 | | | | | | | 8.28 | 2 | 31 |
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| 1959 | | | | | | | 7.75 | 3 | 31 |
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| 1958 | | | | | | | 4.76 | 40 | 31 |
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| 1957 | | | | | | | 5.65 | 30 | 31 |
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| 1956 | | | | | | | 5.36 | 34 | 31 |
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| 1955 | | | | | | | 5.87 | 28 | 31 |
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| 1954 | | | | | | | 5.96 | 25 | 31 |
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| 1953 | | | | | | | 7.00 | 9 | 31 |
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| 1952 | | | | | | | 7.55 | 6 | 31 |
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| 1951 | | | | | | | 6.35 | 22 | 31 |
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| 1950 | | | | | | | 1.82 | 97 | 31 |
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| 1949 | | | | | | | 2.22 | 88 | 31 |
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| 1948 | | | | | | | 1.65 | 99 | 31 |
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| 1947 | | | | | | | 5.71 | 29 | 31 |
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| 1946 | | | | | | | 1.36 | 103 | 31 |
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| 1945 | | | | | | | 4.34 | 48 | 31 |
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| 1944 | | | | | | | 4.86 | 38 | 31 |
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| 1943 | | | | | | | 4.67 | 43 | 31 |
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| 1942 | | | | | | | 4.47 | 45 | 31 |
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| 1940 | 64 | 37 | 73.8 | 52 | 54.3 | 11 | | | 0 |
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| 1939 | | | | | | | 3.60 | 65 | 26 |
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| 1938 | | | | | | | | | 23 |
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| 1937 | | | | | | | | | 25 |
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| 1936 | 67 | 16 | 80.3 | 14 | 53.7 | 14 | | | 2 |
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| 1935 | 67.1 | 12 | 77.5 | 38 | 55.9 | 7 | 3.81 | 61 | 2 |
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| 1934 | | | 79.7 | 21 | 49.7 | 46 | 2.48 | 82 | 4 |
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| 1933 | | | | | | | 0.98 | 107 | 31 |
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| 1923 | 62.4 | 44 | 78.4 | 30 | 46.3 | 55 | | | 1 |
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| 1922 | 68 | 7 | 82.5 | 4 | 53.7 | 14 | 2.13 | 92 | 2 |
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| 1921 | 64.6 | 34 | 79.8 | 18 | 49 | 50 | 2.50 | 80 | 1 |
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| 1920 | 62.7 | 43 | 80.2 | 15 | 45.1 | 57 | 0.62 | 111 | 0 |
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| 1919 | | | | | | | | | 6 |
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| 1918 | 67.1 | 12 | 81.9 | 7 | 52.2 | 31 | 4.86 | 38 | 3 |
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| 1917 | | | 74.1 | 51 | 46 | 56 | 2.14 | 91 | 4 |
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| 1916 | 68.7 | 4 | 83.2 | 2 | 53.6 | 17 | 6.40 | 20 | 1 |
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| 1915 | 59.4 | 49 | 71.9 | 56 | 46.7 | 54 | 3.02 | 71 | 1 |
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| 1914 | | | 78.9 | 26 | | | 2.30 | 86 | 6 |
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| 1913 | | | 81 | 12 | 55.3 | 8 | 0.81 | 109 | 4 |
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| 1912 | | | | | 50.5 | 42 | 6.10 | 23 | 7 |
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| 1911 | | | 76 | 43 | | | 3.01 | 72 | 7 |
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| 1910 | | | | | | | 2.49 | 81 | 12 |
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| 1909 | | | 79.1 | 25 | | | 3.83 | 60 | 8 |
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| 1907 | | | | | 51.4 | 38 | 2.28 | 87 | 7 |
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| 1906 | | | | | | | 4.73 | 42 | 13 |
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| 1905 | | | | | 52.5 | 29 | | | 5 |
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| 1904 | 62.2 | 45 | 73.3 | 53 | 50.7 | 40 | 4.00 | 58 | 3 |
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| 1903 | | | 71.8 | 57 | 49.8 | 45 | | | 4 |
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| 1902 | 62.8 | 42 | 76.4 | 41 | 49.3 | 48 | 1.96 | 96 | 0 |
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| 1901 | 67.1 | 12 | 81.1 | 10 | 53 | 25 | 4.40 | 47 | 1 |
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| 1900 | 73.5 | 1 | 85 | 1 | 62.1 | 1 | 8.36 | 1 | 0 |
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| 1899 | 67.4 | 9 | 78.5 | 28 | 56.3 | 6 | 4.46 | 46 | 0 |
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| 1898 | 66.2 | 19 | 79.8 | 18 | 52.7 | 27 | 2.60 | 79 | 0 |
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| 1897 | | | | | | | 4.30 | 49 | 15 |
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| 1896 | 65.8 | 25 | 79.9 | 17 | 51.6 | 37 | 1.57 | 102 | 0 |
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| 1895 | 65.9 | 23 | 78.5 | 28 | 53.2 | 23 | 3.19 | 70 | 1 |
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| 1894 | 66.4 | 18 | 82.4 | 6 | 49.7 | 46 | 0.72 | 110 | 2 |
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| 1893 | | | 77.6 | 37 | 49.3 | 48 | 4.12 | 53 | 4 |
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