Every December in Challis, ID from 1895 to 2025, 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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| 2025 | 32.8 | 2 | 42.4 | 3 | 23.3 | 2 | 0.95 | 13 | 0 |
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| 2024 | 27.7 | 10 | 37.9 | 9 | 17.5 | 12 | 0.42 | 49 | 0 |
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| 2023 | 23.3 | 33 | 32.7 | 37 | 13.9 | 34 | 0.30 | 63 | 0 |
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| 2022 | 17.8 | 74 | 27.8 | 79 | 7.7 | 79 | 0.87 | 16 | 0 |
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| 2021 | 27.5 | 11 | 37.6 | 12 | 17.4 | 14 | 0.29 | 65 | 0 |
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| 2020 | 19.9 | 62 | 31.2 | 52 | 8.6 | 75 | 0.50 | 39 | 0 |
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| 2019 | 18.3 | 71 | 28.2 | 76 | 8.5 | 76 | 0.70 | 26 | 0 |
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| 2018 | 18 | 72 | 28.8 | 73 | 7.1 | 81 | 0.18 | 85 | 0 |
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| 2017 | 23.5 | 31 | 34.4 | 27 | 12.7 | 44 | 0.18 | 85 | 0 |
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| 2016 | 10.7 | 94 | 21.7 | 95 | -0.3 | 103 | 1.33 | 5 | 0 |
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| 2015 | 18.7 | 69 | 28.2 | 76 | 9.2 | 70 | 0.83 | 20 | 0 |
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| 2014 | 24.7 | 26 | 32.4 | 42 | 16.9 | 19 | 0.70 | 26 | 0 |
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| 2013 | 15.5 | 84 | 26.7 | 83 | 4.3 | 91 | 0.28 | 66 | 0 |
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| 2012 | 21.6 | 47 | 30.8 | 55 | 12.5 | 46 | 0.87 | 16 | 0 |
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| 2011 | 20.3 | 59 | 32.6 | 39 | 8 | 78 | 0.31 | 57 | 0 |
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| 2010 | 17.9 | 73 | 26.5 | 84 | 9.3 | 69 | 1.10 | 9 | 0 |
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| 2009 | 15.6 | 83 | 26.4 | 86 | 4.8 | 88 | 0.17 | 87 | 0 |
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| 2008 | 19.4 | 65 | 29.1 | 70 | 9.6 | 67 | 0.65 | 28 | 0 |
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| 2007 | 20.7 | 55 | 30.5 | 56 | 10.8 | 58 | 0.31 | 57 | 0 |
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| 2006 | 22.5 | 41 | 31.9 | 48 | 13.1 | 41 | 0.42 | 49 | 2 |
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| 2005 | | | | | 3.1 | 94 | 0.97 | 12 | 4 |
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| 2004 | 25.5 | 21 | 35.6 | 20 | 15.4 | 25 | 0.13 | 91 | 0 |
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| 2003 | 23 | 38 | 31.9 | 48 | 14 | 33 | 0.39 | 52 | 0 |
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| 2002 | 24.8 | 25 | 32 | 45 | 17.5 | 12 | 0.03 | 101 | 0 |
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| 2001 | 11.4 | 93 | 21.3 | 96 | 1.5 | 100 | 0.53 | 37 | 0 |
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| 2000 | 16.1 | 81 | 26.5 | 84 | 5.7 | 85 | 0.27 | 69 | 0 |
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| 1999 | 21.1 | 50 | 31.5 | 50 | 10.7 | 59 | 0.31 | 57 | 0 |
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| 1998 | 17.6 | 76 | 26.8 | 81 | 8.4 | 77 | 0.31 | 57 | 0 |
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| 1995 | | | | | 19.4 | 6 | 1.77 | 4 | 11 |
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| 1994 | | | | | 12.1 | 50 | 0.43 | 48 | 9 |
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| 1993 | | | | | 13.8 | 35 | 0.26 | 72 | 6 |
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| 1992 | 20.6 | 56 | 30.5 | 56 | 10.7 | 59 | 0.36 | 55 | 0 |
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| 1991 | | | | | 13.2 | 40 | 0.15 | 90 | 6 |
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| 1990 | 14.3 | 86 | 25 | 88 | 3.6 | 92 | 0.24 | 80 | 0 |
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| 1989 | 28.2 | 8 | 39 | 7 | 17.2 | 18 | 0.02 | 103 | 1 |
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| 1988 | 16.1 | 81 | 27.9 | 78 | 4.7 | 89 | | | 1 |
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| 1987 | | | | | | | | | 10 |
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| 1986 | 20.9 | 52 | 32.4 | 42 | 9.7 | 65 | 0.06 | 100 | 1 |
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| 1985 | 7.1 | 96 | 17.2 | 99 | -2.9 | 105 | 0.47 | 46 | 0 |
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| 1984 | 13.1 | 88 | 24.5 | 89 | 2.3 | 98 | 0.37 | 54 | 2 |
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| 1983 | | | 18 | 98 | -0.7 | 104 | 1.19 | 7 | 4 |
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| 1982 | | | 30.5 | 56 | | | 0.87 | 16 | 10 |
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| 1981 | 23.3 | 33 | 32 | 45 | 14.5 | 27 | 0.95 | 13 | 0 |
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| 1980 | 29.6 | 5 | 39.3 | 5 | 20.3 | 5 | 0.47 | 46 | 1 |
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| 1979 | 27.9 | 9 | 37.9 | 9 | 17.8 | 11 | 0.32 | 56 | 0 |
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| 1978 | 16.5 | 79 | 26.8 | 81 | 6.5 | 83 | 0.55 | 35 | 1 |
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| 1977 | 26.1 | 16 | 34.7 | 25 | 17.4 | 14 | 0.83 | 20 | 0 |
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| 1976 | | | | | | | trace | 104 | 5 |
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| 1975 | 27 | 13 | 35.9 | 18 | 18 | 10 | 0.26 | 72 | 0 |
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| 1974 | 22.4 | 43 | 31.1 | 54 | 12.8 | 43 | 0.42 | 49 | 1 |
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| 1973 | 25.5 | 21 | 33.7 | 30 | 17.4 | 14 | 0.60 | 31 | 0 |
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| 1972 | | | | | 4.6 | 90 | 0.30 | 63 | 5 |
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| 1971 | 18.8 | 68 | 28.5 | 74 | 9 | 72 | 1.31 | 6 | 0 |
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| 1970 | 20.5 | 58 | 30.4 | 59 | 10.5 | 61 | 0.48 | 42 | 0 |
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| 1969 | 26 | 18 | 35.3 | 21 | 16.6 | 21 | 0.61 | 29 | 1 |
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| 1968 | 22.4 | 43 | 31.5 | 50 | 13.3 | 38 | 0.59 | 33 | 0 |
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| 1967 | 20.6 | 56 | 29.4 | 69 | 11.6 | 54 | 0.20 | 82 | 1 |
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| 1966 | 23.3 | 33 | 32.3 | 44 | 14.3 | 30 | 0.61 | 29 | 0 |
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| 1965 | 23.9 | 30 | 33.5 | 31 | 14.3 | 30 | 0.20 | 82 | 0 |
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| 1964 | 23.5 | 31 | 31.2 | 52 | 15.9 | 24 | 3.72 | 1 | 0 |
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| 1963 | 19.8 | 63 | 29.8 | 67 | 9.8 | 63 | 0.03 | 101 | 0 |
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| 1962 | 28.3 | 7 | 37.2 | 13 | 18.5 | 8 | 0.23 | 81 | 1 |
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| 1961 | 21.5 | 48 | 29.9 | 64 | 13 | 42 | 0.28 | 66 | 0 |
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| 1960 | 22.6 | 40 | 34.3 | 28 | 10.9 | 57 | 0.12 | 93 | 1 |
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| 1959 | 22.1 | 46 | 33.1 | 34 | 11.1 | 56 | 0.26 | 72 | 0 |
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| 1958 | | | | | | | | | 20 |
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| 1957 | 23.2 | 36 | 33.2 | 32 | 13.3 | 38 | 0.38 | 53 | 0 |
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| 1956 | | | | | 13.7 | 37 | 0.16 | 89 | 4 |
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| 1955 | 26 | 18 | 35.1 | 22 | 16.7 | 20 | 1.93 | 3 | 1 |
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| 1954 | 18.6 | 70 | 29.9 | 64 | 7.3 | 80 | 0.20 | 82 | 0 |
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| 1953 | 25.4 | 23 | 34.9 | 24 | 16 | 23 | 0.31 | 57 | 0 |
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| 1952 | 20.3 | 59 | 29.1 | 70 | 11.7 | 52 | 0.60 | 31 | 2 |
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| 1951 | 21.2 | 49 | 32.7 | 37 | 9.8 | 63 | 0.27 | 69 | 0 |
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| 1950 | 26.1 | 16 | 36 | 17 | 16.3 | 22 | 0.25 | 77 | 0 |
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| 1949 | 24.3 | 29 | 35.8 | 19 | 12.7 | 44 | 0.12 | 93 | 0 |
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| 1948 | 12.9 | 89 | 23.6 | 94 | 2.2 | 99 | 0.72 | 25 | 0 |
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| 1947 | | | 34.3 | 28 | 14.5 | 27 | 0.31 | 57 | 4 |
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| 1946 | 27.5 | 11 | 36.4 | 16 | 18.7 | 7 | 0.25 | 77 | 0 |
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| 1945 | 19.7 | 64 | 29.7 | 68 | 9.7 | 65 | 0.48 | 42 | 0 |
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| 1944 | 17.8 | 74 | 30.1 | 61 | 5.4 | 86 | 0.26 | 72 | 0 |
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| 1943 | 22.3 | 45 | 33.1 | 34 | 11.6 | 54 | 0.12 | 93 | 0 |
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| 1942 | 22.5 | 41 | 32.6 | 39 | 12.5 | 46 | 0.76 | 23 | 0 |
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| 1941 | 25.9 | 20 | 34.6 | 26 | 17.3 | 17 | 0.75 | 24 | 0 |
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| 1940 | 26.3 | 14 | 37.9 | 9 | 14.7 | 26 | 0.83 | 20 | 0 |
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| 1939 | 32.8 | 2 | 44.3 | 2 | 21.3 | 3 | trace | 104 | 0 |
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| 1938 | 26.2 | 15 | 38 | 8 | 14.4 | 29 | trace | 104 | 0 |
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| 1937 | 25.2 | 24 | 36.5 | 15 | 13.8 | 35 | 1.16 | 8 | 0 |
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| 1936 | 24.5 | 27 | 35 | 23 | 14.1 | 32 | 0.10 | 96 | 0 |
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| 1935 | 17.1 | 78 | 28.4 | 75 | 5.8 | 84 | 0.10 | 96 | 0 |
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| 1934 | 24.4 | 28 | 36.7 | 14 | 12 | 51 | 0.09 | 99 | 0 |
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| 1933 | 30.8 | 4 | 41.1 | 4 | 20.5 | 4 | 0.25 | 77 | 3 |
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| 1932 | 12.2 | 91 | 24.1 | 91 | 0.3 | 102 | 0.27 | 69 | 3 |
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| 1931 | | | | | 3 | 96 | 0.28 | 66 | 7 |
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| 1930 | 13.5 | 87 | 24.1 | 91 | 2.9 | 97 | 0.13 | 91 | 0 |
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| 1929 | 28.8 | 6 | 39.2 | 6 | 18.4 | 9 | 2.11 | 2 | 1 |
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| 1928 | 15.2 | 85 | 27.4 | 80 | 3.1 | 94 | 1.01 | 11 | 0 |
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| 1927 | 17.2 | 77 | 29.1 | 70 | 5.3 | 87 | 0.26 | 72 | 0 |
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| 1926 | 22.9 | 39 | 32.5 | 41 | 12.3 | 49 | | | 1 |
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| 1924 | 12.4 | 90 | 21.2 | 97 | 3.6 | 92 | 0.48 | 42 | 0 |
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| 1923 | 19.4 | 65 | 30.2 | 60 | 8.7 | 73 | | | 1 |
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| 1922 | 19.3 | 67 | 29.9 | 64 | 8.7 | 73 | 1.06 | 10 | 0 |
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| 1921 | 20.2 | 61 | 30 | 63 | 10.4 | 62 | 0.50 | 39 | 0 |
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| 1920 | 20.8 | 54 | 30.1 | 61 | 11.7 | 52 | 0.57 | 34 | 1 |
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| 1919 | 12.1 | 92 | 23.8 | 93 | 0.5 | 101 | 0.91 | 15 | 0 |
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| 1918 | 21.1 | 50 | 33.2 | 32 | 9.1 | 71 | 0.10 | 96 | 0 |
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| 1917 | 35.6 | 1 | 45 | 1 | 26.2 | 1 | 0.86 | 19 | 0 |
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| 1916 | 16.5 | 79 | 26.2 | 87 | 6.7 | 82 | 0.52 | 38 | 1 |
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| 1915 | 23.2 | 36 | 32.9 | 36 | 12.4 | 48 | 0.48 | 42 | 1 |
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| 1914 | 8.1 | 95 | 24.5 | 89 | -8 | 106 | 0.17 | 87 | 1 |
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| 1897 | | | | | | | 0.50 | 39 | 31 |
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| 1895 | 20.9 | 52 | 32 | 45 | 9.5 | 68 | 0.55 | 35 | 1 |
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