Every January in Hayward, WI from 1894 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 | 7.7 | 47 | 16.4 | 59 | -1.1 | 37 | | | 0 |
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| 2025 | 9.8 | 38 | 20.5 | 43 | -0.8 | 36 | trace | 109 | 0 |
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| 2024 | 18.8 | 7 | 25.2 | 24 | 12.9 | 2 | 0.04 | 108 | 1 |
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| 2023 | 18.6 | 8 | 25.4 | 22 | 11.8 | 3 | 0.72 | 56 | 0 |
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| 2022 | 5.3 | 52 | 16.8 | 58 | -6.2 | 56 | 0.07 | 107 | 0 |
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| 2021 | 18 | 12 | 26.8 | 17 | 9.2 | 8 | 0.16 | 99 | 0 |
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| 2020 | 18.1 | 10 | 25.8 | 20 | 10.4 | 5 | 0.47 | 74 | 0 |
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| 2019 | 9.5 | 40 | 18.5 | 51 | 0.6 | 32 | 0.14 | 102 | 0 |
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| 2018 | 12.8 | 27 | 23.6 | 29 | 2 | 27 | 0.15 | 100 | 0 |
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| 2017 | 16.8 | 17 | 25.2 | 24 | 8.4 | 11 | 0.79 | 50 | 0 |
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| 2016 | 13.8 | 24 | 22.1 | 38 | 5.5 | 17 | 0.38 | 84 | 0 |
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| 2015 | 12.9 | 25 | 20.9 | 41 | 4.8 | 19 | 0.14 | 102 | 0 |
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| 2014 | 1.9 | 57 | 13.3 | 65 | -9.6 | 62 | 0.39 | 83 | 0 |
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| 2013 | 12.9 | 25 | 23 | 32 | 2.8 | 25 | 0.67 | 60 | 0 |
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| 2012 | 17.5 | 14 | 27.4 | 13 | 7.5 | 15 | 0.71 | 58 | 0 |
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| 2011 | 9.3 | 41 | 17.2 | 55 | 0.8 | 30 | 0.36 | 86 | 1 |
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| 2010 | 10.2 | 35 | 21.6 | 39 | -1.2 | 38 | 0.88 | 45 | 0 |
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| 2009 | 1 | 59 | 14.9 | 63 | -12.8 | 67 | 0.42 | 80 | 0 |
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| 2008 | | | | | | | 0.15 | 100 | 4 |
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| 2007 | 17.6 | 13 | 27 | 15 | 8.2 | 13 | 0.21 | 95 | 0 |
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| 2006 | 25.5 | 1 | 33 | 1 | 18.1 | 1 | 1.07 | 36 | 0 |
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| 2005 | 10.8 | 33 | 20.8 | 42 | 0.8 | 30 | 0.61 | 66 | 0 |
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| 2004 | 6.1 | 51 | 15.7 | 61 | -3.5 | 49 | 0.36 | 86 | 0 |
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| 2003 | 9.1 | 44 | 19.7 | 46 | -1.5 | 41 | 0.12 | 104 | 0 |
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| 2002 | 19.5 | 3 | 29.2 | 7 | 9.7 | 6 | 0.12 | 104 | 0 |
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| 2001 | 15.5 | 19 | 27 | 15 | 3.9 | 21 | 1.43 | 20 | 0 |
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| 2000 | 9.9 | 37 | 23.1 | 30 | -3.3 | 47 | 0.35 | 90 | 3 |
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| 1999 | 7.9 | 46 | 19 | 49 | -3.2 | 45 | 0.77 | 52 | 0 |
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| 1998 | 19.1 | 6 | 27.2 | 14 | 11.1 | 4 | 1.16 | 33 | 0 |
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| 1997 | | | | | | | 2.27 | 6 | 31 |
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| 1996 | | | | | | | 2.65 | 4 | 31 |
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| 1995 | | | | | | | 0.28 | 92 | 31 |
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| 1993 | | | | | | | 1.19 | 30 | 31 |
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| 1990 | | | | | | | 0.53 | 71 | 31 |
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| 1989 | | | | | | | 1.04 | 37 | 31 |
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| 1988 | | | | | | | 1.12 | 35 | 31 |
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| 1987 | | | | | | | 0.31 | 91 | 31 |
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| 1986 | | | | | | | 0.44 | 76 | 31 |
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| 1985 | | | | | | | 0.53 | 71 | 31 |
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| 1984 | | | | | | | 0.67 | 60 | 31 |
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| 1983 | | | | | | | 1.61 | 18 | 31 |
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| 1982 | | | | | | | 2.17 | 7 | 31 |
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| 1981 | | | | | | | 0.17 | 98 | 31 |
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| 1980 | | | | | | | 2.45 | 5 | 31 |
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| 1979 | | | | | | | 1.37 | 24 | 31 |
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| 1978 | | | | | | | 0.72 | 56 | 31 |
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| 1977 | | | | | | | 0.74 | 55 | 31 |
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| 1976 | | | | | | | 1.88 | 12 | 31 |
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| 1975 | | | | | | | 1.84 | 13 | 31 |
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| 1974 | | | | | | | 0.43 | 78 | 31 |
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| 1973 | | | | | | | 1.40 | 21 | 31 |
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| 1972 | | | | | | | 1.96 | 10 | 31 |
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| 1971 | | | | | | | 1.97 | 9 | 31 |
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| 1970 | | | | | | | 0.68 | 59 | 31 |
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| 1969 | | | | | | | 3.20 | 2 | 31 |
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| 1968 | | | | | | | 0.82 | 48 | 31 |
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| 1967 | | | | | | | 3.22 | 1 | 31 |
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| 1966 | | | | | | | 0.78 | 51 | 31 |
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| 1965 | | | | | | | 0.60 | 67 | 31 |
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| 1964 | | | | | | | 0.64 | 65 | 31 |
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| 1963 | | | | | | | 0.44 | 76 | 31 |
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| 1962 | | | | | | | 0.91 | 43 | 31 |
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| 1961 | | | | | | | 0.11 | 106 | 31 |
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| 1960 | | | | | | | 1.22 | 29 | 31 |
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| 1959 | | | | | | | 0.49 | 73 | 31 |
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| 1958 | | | | | | | 0.67 | 60 | 31 |
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| 1957 | | | | | | | 0.24 | 94 | 31 |
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| 1956 | | | | | | | 0.43 | 78 | 31 |
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| 1955 | | | | | | | 0.56 | 69 | 31 |
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| 1954 | | | | | | | 0.88 | 45 | 31 |
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| 1953 | | | | | | | 1.17 | 32 | 31 |
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| 1952 | | | | | | | 1.81 | 14 | 31 |
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| 1951 | | | | | | | 0.36 | 86 | 31 |
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| 1950 | | | | | | | 3.04 | 3 | 31 |
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| 1949 | 14.4 | 21 | 25 | 26 | 3.8 | 22 | 0.94 | 40 | 0 |
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| 1948 | | | | | | | | | 5 |
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| 1947 | 13.9 | 23 | 25.5 | 21 | 2.3 | 26 | 0.40 | 81 | 0 |
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| 1946 | 12.7 | 28 | 24.6 | 27 | -0.7 | 35 | 1.27 | 28 | 3 |
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| 1945 | 7.3 | 48 | 19.3 | 47 | -4.6 | 53 | 1.30 | 27 | 1 |
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| 1944 | | | | | 9.5 | 7 | 0.87 | 47 | 31 |
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| 1943 | | | | | | | 0.96 | 38 | 6 |
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| 1942 | 18.1 | 10 | 29.1 | 10 | 5.1 | 18 | 0.18 | 97 | 3 |
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| 1941 | 14 | 22 | 24.6 | 27 | 3.5 | 24 | 1.19 | 30 | 0 |
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| 1940 | | | 18.6 | 50 | -6.9 | 57 | 0.21 | 95 | 4 |
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| 1939 | | | | | 4 | 20 | | | 6 |
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| 1938 | | | | | -4.9 | 54 | 1.40 | 21 | 6 |
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| 1937 | | | 18.2 | 52 | -12 | 64 | | | 4 |
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| 1936 | | | | | -8.9 | 61 | 1.63 | 17 | 5 |
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| 1935 | | | 17.8 | 54 | | | | | 6 |
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| 1934 | 17.3 | 16 | 29.2 | 7 | 6.3 | 16 | 0.90 | 44 | 2 |
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| 1924 | 2.4 | 55 | 17 | 57 | -12.1 | 65 | 1.31 | 26 | 0 |
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| 1923 | 12.1 | 29 | 26.6 | 18 | -2.4 | 43 | 1.92 | 11 | 0 |
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| 1921 | 17.4 | 15 | 31.3 | 2 | 3.6 | 23 | 0.25 | 93 | 1 |
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| 1920 | 1.8 | 58 | 18.1 | 53 | -15 | 68 | 1.71 | 16 | 3 |
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| 1919 | 19.4 | 5 | 29.4 | 6 | 8.6 | 9 | 0.56 | 69 | 1 |
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| 1918 | 0.7 | 60 | 13.1 | 66 | -12.4 | 66 | 0.82 | 48 | 3 |
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| 1917 | | | 23.1 | 30 | -7.6 | 59 | 0.75 | 53 | 5 |
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| 1916 | 9.2 | 43 | 23 | 32 | -4.4 | 52 | 1.77 | 15 | 1 |
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| 1915 | 9 | 45 | 19.2 | 48 | -1.7 | 42 | | | 1 |
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| 1914 | 18.5 | 9 | 29.2 | 7 | 8.3 | 12 | | | 2 |
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| 1913 | 11.6 | 31 | 25.9 | 19 | -2.6 | 44 | 1.40 | 21 | 2 |
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| 1912 | | | 5 | 67 | -20.3 | 69 | 0.65 | 64 | 4 |
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| 1911 | 7.1 | 49 | 20.3 | 44 | -5.3 | 55 | 0.96 | 38 | 2 |
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| 1910 | 9.7 | 39 | 22.6 | 35 | -3.2 | 45 | 0.75 | 53 | 1 |
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| 1909 | 11.1 | 32 | 22.7 | 34 | 0.4 | 33 | 0.40 | 81 | 2 |
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| 1908 | 14.8 | 20 | 27.9 | 12 | 1.7 | 29 | 0.67 | 60 | 0 |
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| 1907 | 5 | 54 | 17.2 | 55 | -7.6 | 59 | 1.33 | 25 | 1 |
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| 1906 | | | 28 | 11 | | | 2.02 | 8 | 6 |
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| 1905 | | | | | | | 0.57 | 68 | 13 |
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| 1904 | 2.1 | 56 | 15.1 | 62 | -10.9 | 63 | 0.36 | 86 | 0 |
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| 1903 | 10.2 | 35 | 21.6 | 39 | -0.6 | 34 | 0.38 | 84 | 3 |
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| 1902 | 15.9 | 18 | 29.5 | 5 | 1.8 | 28 | | | 2 |
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| 1901 | 12.1 | 29 | 25.3 | 23 | -1.2 | 38 | 0.94 | 40 | 3 |
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| 1900 | 19.5 | 3 | 30.7 | 3 | 8.2 | 13 | 1.53 | 19 | 0 |
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| 1899 | 9.3 | 41 | 22.3 | 36 | -3.6 | 50 | 1.15 | 34 | 0 |
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| 1898 | 19.6 | 2 | 30.6 | 4 | 8.5 | 10 | 0.47 | 74 | 1 |
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| 1897 | 6.8 | 50 | 15.8 | 60 | -3.3 | 47 | | | 1 |
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| 1896 | 10.5 | 34 | 22.2 | 37 | -1.2 | 38 | | | 0 |
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| 1895 | 5.1 | 53 | 14.5 | 64 | -4.2 | 51 | 0.92 | 42 | 0 |
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| 1894 | | | 20.2 | 45 | -7.1 | 58 | | | 5 |
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