Every January in Chattanooga, TN from 1879 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 | 41 | 71 | 51.6 | 52 | 30.4 | 86 | 3.64 | 102 | 0 |
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| 2025 | 37.1 | 113 | 47.5 | 104 | 26.6 | 121 | 3.34 | 111 | 0 |
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| 2024 | 39.1 | 95 | 48.3 | 93 | 30 | 93 | 6.47 | 34 | 0 |
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| 2023 | 48.2 | 11 | 57.2 | 10 | 39.2 | 14 | 5.57 | 55 | 0 |
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| 2022 | 40.3 | 81 | 50 | 78 | 30.7 | 83 | 4.52 | 85 | 0 |
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| 2021 | 44.3 | 34 | 52.7 | 37 | 35.9 | 32 | 3.08 | 118 | 0 |
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| 2020 | 47.1 | 14 | 55.5 | 18 | 38.7 | 15 | 5.97 | 46 | 0 |
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| 2019 | 42.6 | 48 | 51.3 | 56 | 34 | 50 | 7.00 | 27 | 0 |
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| 2018 | 36.7 | 115 | 47.4 | 107 | 25.9 | 123 | 1.17 | 146 | 0 |
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| 2017 | 49.1 | 8 | 57.6 | 7 | 40.7 | 10 | 4.99 | 70 | 0 |
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| 2016 | 38.6 | 100 | 47.8 | 99 | 29.4 | 103 | 3.67 | 100 | 0 |
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| 2015 | 39.8 | 87 | 49.2 | 89 | 30.4 | 86 | 3.49 | 106 | 0 |
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| 2014 | 33.7 | 133 | 45.3 | 126 | 22.1 | 143 | 2.40 | 136 | 0 |
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| 2013 | 45.4 | 26 | 53.6 | 31 | 37.2 | 24 | 9.74 | 8 | 0 |
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| 2012 | 45 | 32 | 55.1 | 21 | 34.8 | 42 | 7.10 | 25 | 0 |
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| 2011 | 37.4 | 112 | 46.4 | 114 | 28.5 | 110 | 4.27 | 93 | 0 |
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| 2010 | 36.4 | 117 | 44.7 | 128 | 28.1 | 112 | 5.78 | 49 | 0 |
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| 2009 | 40 | 84 | 49.8 | 80 | 30.2 | 90 | 5.11 | 67 | 0 |
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| 2008 | 40.1 | 82 | 50.2 | 75 | 30 | 93 | 3.18 | 116 | 0 |
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| 2007 | 43.6 | 40 | 53 | 34 | 34.2 | 47 | 2.91 | 121 | 0 |
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| 2006 | 47 | 15 | 56.8 | 12 | 37.2 | 24 | 5.19 | 64 | 0 |
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| 2005 | 45.5 | 25 | 55.4 | 19 | 35.6 | 35 | 2.80 | 124 | 0 |
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| 2004 | 39.8 | 87 | 49.8 | 80 | 29.7 | 98 | 3.60 | 104 | 0 |
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| 2003 | 36.4 | 117 | 45.9 | 119 | 26.9 | 119 | 1.83 | 143 | 0 |
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| 2002 | 44.3 | 34 | 55.2 | 20 | 33.4 | 56 | 5.42 | 58 | 0 |
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| 2001 | 37.7 | 107 | 47.8 | 99 | 27.6 | 115 | 5.40 | 59 | 0 |
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| 2000 | 41.2 | 69 | 50.7 | 64 | 31.7 | 78 | 5.08 | 69 | 0 |
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| 1999 | 45.1 | 30 | 55.1 | 21 | 35.1 | 40 | 9.80 | 7 | 0 |
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| 1998 | 44.5 | 33 | 52.7 | 37 | 36.3 | 28 | 6.64 | 31 | 0 |
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| 1997 | 41.5 | 65 | 50.9 | 61 | 32 | 73 | 6.14 | 42 | 0 |
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| 1996 | 38.7 | 96 | 48.2 | 95 | 29.2 | 105 | 7.99 | 18 | 0 |
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| 1995 | 42.1 | 56 | 51.5 | 54 | 32.7 | 66 | 5.27 | 63 | 0 |
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| 1994 | 36.2 | 119 | 44.7 | 128 | 27.6 | 115 | 6.36 | 35 | 0 |
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| 1993 | 45.8 | 20 | 54.1 | 27 | 37.5 | 21 | 5.16 | 66 | 0 |
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| 1992 | 42.1 | 56 | 52.1 | 44 | 32.1 | 72 | 4.33 | 91 | 0 |
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| 1991 | 42.6 | 48 | 50.5 | 67 | 34.6 | 44 | 2.71 | 128 | 0 |
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| 1990 | 46.7 | 16 | 56.8 | 12 | 36.7 | 27 | 7.46 | 20 | 0 |
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| 1989 | 45.2 | 28 | 56.8 | 12 | 33.7 | 52 | 5.30 | 61 | 0 |
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| 1988 | 35.1 | 126 | 44.5 | 130 | 25.7 | 125 | 7.10 | 25 | 0 |
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| 1987 | 39.3 | 93 | 48.2 | 95 | 30.4 | 86 | 6.29 | 38 | 0 |
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| 1986 | 38.4 | 103 | 51.5 | 54 | 25.2 | 133 | 0.90 | 148 | 0 |
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| 1985 | 32.8 | 138 | 41.8 | 141 | 23.7 | 141 | 3.45 | 108 | 0 |
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| 1984 | 35.4 | 125 | 45.6 | 120 | 25.3 | 132 | 3.25 | 115 | 0 |
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| 1983 | 38.7 | 96 | 47.6 | 103 | 29.9 | 97 | 2.65 | 130 | 0 |
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| 1982 | 36 | 120 | 46.4 | 114 | 25.6 | 128 | 8.29 | 15 | 0 |
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| 1981 | 35.5 | 123 | 46.5 | 113 | 24.5 | 136 | 1.91 | 142 | 0 |
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| 1980 | 40.7 | 76 | 47.7 | 102 | 33.7 | 52 | 4.69 | 80 | 0 |
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| 1979 | 33.7 | 133 | 41.7 | 142 | 25.7 | 125 | 5.44 | 56 | 0 |
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| 1978 | 30.2 | 141 | 37.3 | 146 | 23.2 | 142 | 5.79 | 48 | 0 |
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| 1977 | 28.5 | 143 | 38.1 | 145 | 18.9 | 147 | 3.14 | 117 | 0 |
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| 1976 | 34.6 | 129 | 44.4 | 131 | 24.8 | 134 | 4.32 | 92 | 0 |
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| 1975 | 42.6 | 48 | 53 | 34 | 32.3 | 69 | 5.63 | 53 | 0 |
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| 1974 | 49.3 | 7 | 57.4 | 9 | 41.2 | 7 | 8.00 | 17 | 0 |
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| 1973 | 36 | 120 | 45.3 | 126 | 26.6 | 121 | 5.09 | 68 | 0 |
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| 1972 | 43.4 | 42 | 53.8 | 30 | 32.9 | 64 | 8.64 | 12 | 0 |
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| 1971 | 38.7 | 96 | 48 | 97 | 29.5 | 102 | 5.19 | 64 | 0 |
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| 1970 | 31.9 | 140 | 42.2 | 138 | 21.7 | 144 | 2.45 | 134 | 0 |
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| 1969 | 38.3 | 104 | 46.6 | 112 | 30 | 93 | 6.84 | 28 | 0 |
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| 1968 | 37.1 | 113 | 46.3 | 116 | 27.9 | 114 | 4.98 | 71 | 0 |
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| 1967 | 41 | 71 | 51.3 | 56 | 30.7 | 83 | 3.02 | 120 | 0 |
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| 1966 | 33.1 | 136 | 41.9 | 139 | 24.3 | 138 | 3.67 | 100 | 0 |
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| 1965 | 40.9 | 74 | 51.7 | 49 | 30 | 93 | 3.51 | 105 | 0 |
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| 1964 | 39.9 | 86 | 51.7 | 49 | 28.1 | 112 | 5.98 | 45 | 0 |
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| 1963 | 32.5 | 139 | 43.6 | 135 | 21.5 | 145 | 4.81 | 76 | 0 |
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| 1962 | 38.5 | 101 | 47.4 | 107 | 29.6 | 100 | 7.79 | 19 | 0 |
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| 1961 | 34.8 | 127 | 45.5 | 122 | 24.1 | 140 | 1.13 | 147 | 0 |
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| 1960 | 41.8 | 60 | 49.7 | 85 | 34 | 50 | 4.96 | 72 | 0 |
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| 1959 | 38 | 105 | 49.3 | 88 | 26.7 | 120 | 6.11 | 44 | 0 |
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| 1958 | 36.5 | 116 | 45.6 | 120 | 27.3 | 117 | 4.07 | 98 | 0 |
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| 1957 | 42.6 | 48 | 51 | 60 | 34.2 | 47 | 9.12 | 11 | 0 |
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| 1956 | 38 | 105 | 47.5 | 104 | 28.6 | 109 | 2.60 | 131 | 0 |
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| 1955 | 40 | 84 | 49.4 | 87 | 30.6 | 85 | 2.72 | 126 | 0 |
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| 1954 | 42 | 58 | 52.5 | 41 | 31.4 | 79 | 10.47 | 5 | 0 |
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| 1953 | 45.8 | 20 | 56.2 | 15 | 35.5 | 37 | 4.89 | 74 | 0 |
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| 1952 | 47.3 | 12 | 56 | 16 | 38.6 | 16 | 6.35 | 36 | 0 |
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| 1951 | 42.4 | 54 | 52.5 | 41 | 32.2 | 70 | 4.59 | 84 | 0 |
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| 1950 | 53.7 | 1 | 60.9 | 1 | 46.4 | 2 | 8.21 | 16 | 0 |
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| 1949 | 49.7 | 5 | 58 | 6 | 41.3 | 6 | 11.00 | 3 | 0 |
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| 1948 | 33.8 | 131 | 43.1 | 137 | 24.4 | 137 | 4.44 | 89 | 0 |
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| 1947 | 43.6 | 40 | 51.7 | 49 | 35.6 | 35 | 12.28 | 2 | 0 |
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| 1946 | 41.7 | 62 | 50.4 | 72 | 33 | 62 | 10.23 | 6 | 0 |
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| 1945 | 39.2 | 94 | 49.2 | 89 | 29.1 | 106 | 2.44 | 135 | 1 |
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| 1944 | 40.1 | 82 | 50.9 | 61 | 29.4 | 103 | 3.27 | 114 | 0 |
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| 1943 | 43.1 | 43 | 53.4 | 32 | 32.9 | 64 | 2.03 | 141 | 0 |
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| 1942 | 37.6 | 108 | 49.8 | 80 | 25.4 | 131 | 3.45 | 108 | 0 |
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| 1941 | 41 | 71 | 51.8 | 48 | 30.1 | 91 | 4.11 | 96 | 0 |
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| 1940 | 28.7 | 142 | 36.6 | 147 | 20.7 | 146 | 2.84 | 123 | 0 |
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| 1939 | 45.4 | 26 | 54.9 | 24 | 35.8 | 33 | 4.95 | 73 | 0 |
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| 1938 | 42.8 | 47 | 50.8 | 63 | 34.9 | 41 | 4.11 | 96 | 0 |
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| 1937 | 53.3 | 2 | 59.5 | 4 | 47.1 | 1 | 11.00 | 3 | 0 |
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| 1936 | 37.6 | 108 | 46.1 | 118 | 29.1 | 106 | 9.62 | 9 | 0 |
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| 1935 | 44.1 | 36 | 52.1 | 44 | 36.1 | 29 | 2.54 | 133 | 0 |
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| 1934 | 45.2 | 28 | 53 | 34 | 37.5 | 21 | 4.20 | 94 | 0 |
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| 1933 | 48.5 | 10 | 55.9 | 17 | 41.1 | 8 | 2.80 | 124 | 0 |
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| 1932 | 49.4 | 6 | 57 | 11 | 41.8 | 5 | 6.29 | 38 | 0 |
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| 1931 | 41.8 | 60 | 50.3 | 74 | 33.4 | 56 | 2.72 | 126 | 0 |
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| 1930 | 41.7 | 62 | 50.1 | 76 | 33.4 | 56 | 2.30 | 139 | 0 |
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| 1929 | 42.4 | 54 | 51.3 | 56 | 33.5 | 55 | 5.72 | 51 | 0 |
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| 1928 | 41.1 | 70 | 50.5 | 67 | 31.8 | 76 | 2.38 | 138 | 0 |
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| 1927 | 43 | 45 | 50.7 | 64 | 35.2 | 39 | 1.63 | 144 | 0 |
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| 1926 | 40.5 | 79 | 48 | 97 | 33 | 62 | 5.71 | 52 | 0 |
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| 1925 | 43.1 | 43 | 50.5 | 67 | 35.7 | 34 | 4.74 | 79 | 0 |
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| 1924 | 35.5 | 123 | 45.4 | 123 | 25.6 | 128 | 6.24 | 41 | 0 |
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| 1923 | 46.5 | 17 | 54.8 | 25 | 38.3 | 18 | 4.81 | 76 | 0 |
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| 1922 | 41.5 | 65 | 48.3 | 93 | 34.7 | 43 | 6.29 | 38 | 0 |
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| 1921 | 44 | 37 | 52 | 46 | 36.1 | 29 | 4.46 | 88 | 0 |
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| 1920 | 42.5 | 52 | 50.5 | 67 | 34.5 | 45 | 4.37 | 90 | 0 |
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| 1919 | 41.4 | 67 | 50.5 | 67 | 32.2 | 70 | 6.13 | 43 | 0 |
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| 1918 | 32.9 | 137 | 40.1 | 144 | 24.8 | 134 | 7.37 | 23 | 1 |
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| 1917 | 45.1 | 30 | 52.6 | 39 | 37.5 | 21 | 7.42 | 21 | 0 |
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| 1916 | 47.2 | 13 | 55.1 | 21 | 39.4 | 12 | 4.75 | 78 | 0 |
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| 1915 | 40.5 | 79 | 48.4 | 92 | 32.7 | 66 | 5.73 | 50 | 0 |
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| 1914 | 43.8 | 39 | 51.6 | 52 | 36 | 31 | 4.52 | 85 | 0 |
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| 1913 | 48.8 | 9 | 57.5 | 8 | 40.2 | 11 | 7.13 | 24 | 0 |
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| 1912 | 35.8 | 122 | 44.3 | 132 | 27.3 | 117 | 3.94 | 99 | 0 |
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| 1911 | 46 | 19 | 54 | 29 | 38 | 19 | 6.52 | 33 | 0 |
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| 1910 | 40.8 | 75 | 49.8 | 80 | 31.8 | 76 | 3.28 | 113 | 0 |
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| 1909 | 46.1 | 18 | 54.1 | 27 | 38 | 19 | 3.44 | 110 | 0 |
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| 1908 | 39.7 | 89 | 47.5 | 104 | 32 | 73 | 3.64 | 102 | 0 |
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| 1907 | 50.6 | 4 | 59 | 5 | 42.3 | 4 | 1.33 | 145 | 0 |
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| 1906 | 44 | 37 | 52.5 | 41 | 35.5 | 37 | 3.32 | 112 | 0 |
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| 1905 | 33.8 | 131 | 41.9 | 139 | 25.6 | 128 | 2.69 | 129 | 0 |
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| 1904 | 37.6 | 108 | 46.2 | 117 | 29 | 108 | 2.58 | 132 | 0 |
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| 1903 | 39.5 | 91 | 47 | 109 | 32 | 73 | 2.16 | 140 | 0 |
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| 1902 | 39.4 | 92 | 47.8 | 99 | 31 | 80 | 3.48 | 107 | 0 |
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| 1901 | 41.6 | 64 | 50.1 | 76 | 33.2 | 60 | 5.30 | 61 | 0 |
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| 1900 | 40.7 | 76 | 50.4 | 72 | 31 | 80 | 4.12 | 95 | 0 |
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| 1899 | 40.7 | 76 | 49 | 91 | 32.5 | 68 | 4.82 | 75 | 0 |
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| 1898 | 45.8 | 20 | 53.1 | 33 | 38.5 | 17 | 5.38 | 60 | 0 |
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| 1897 | 38.5 | 101 | 47 | 109 | 30.1 | 91 | 3.06 | 119 | 0 |
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| 1896 | 41.4 | 67 | 49.6 | 86 | 33.4 | 56 | 2.90 | 122 | 2 |
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| 1895 | | | 45.4 | 123 | 29.6 | 100 | 6.58 | 32 | 6 |
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| 1894 | 45.6 | 24 | 54.3 | 26 | 36.9 | 26 | 4.63 | 83 | 0 |
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| 1893 | 34.7 | 128 | 44 | 134 | 24.3 | 138 | 2.39 | 137 | 2 |
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| 1892 | | | 45.4 | 123 | 28.5 | 110 | 7.39 | 22 | 6 |
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| 1891 | | | 51.1 | 59 | 33.6 | 54 | 6.31 | 37 | 4 |
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| 1890 | | | 60 | 2 | 40.9 | 9 | 4.68 | 82 | 6 |
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| 1889 | 42.9 | 46 | 52.6 | 39 | 33.1 | 61 | 5.44 | 56 | 2 |
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| 1888 | 42.5 | 52 | 50.6 | 66 | 34.4 | 46 | 6.79 | 29 | 0 |
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| 1887 | 39.7 | 89 | 49.8 | 80 | 29.7 | 98 | 5.60 | 54 | 0 |
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| 1886 | 33.6 | 135 | 41.4 | 143 | 25.8 | 124 | 6.78 | 30 | 0 |
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| 1885 | 38.7 | 96 | 47 | 109 | 30.3 | 89 | 8.49 | 13 | 2 |
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| 1884 | 34.6 | 129 | 43.5 | 136 | 25.7 | 125 | 5.81 | 47 | 0 |
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| 1883 | 42 | 58 | 49.9 | 79 | 34.1 | 49 | 9.31 | 10 | 0 |
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| 1882 | 45.7 | 23 | 51.9 | 47 | 39.4 | 12 | 12.67 | 1 | 0 |
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| 1881 | 37.5 | 111 | 44.1 | 133 | 30.8 | 82 | 4.69 | 80 | 0 |
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| 1880 | 52 | 3 | 59.8 | 3 | 44.2 | 3 | 4.48 | 87 | 0 |
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| 1879 | | | | | | | 8.48 | 14 | 8 |
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