Every January in Alturas, CA from 1936 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 | 35.6 | 10 | 50.4 | 5 | 20.8 | 30 | 0.72 | 61 | 0 |
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| 2025 | 32 | 34 | 46.1 | 17 | 17.9 | 48 | 0.59 | 69 | 0 |
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| 2024 | 35.1 | 14 | 43.8 | 34 | 26.3 | 7 | 1.64 | 29 | 0 |
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| 2023 | 27.5 | 59 | 38.3 | 69 | 16.7 | 52 | 1.45 | 34 | 0 |
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| 2022 | 33.3 | 23 | 48.5 | 10 | 18.1 | 46 | 0.11 | 85 | 0 |
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| 2021 | 32.7 | 29 | 44 | 31 | 21.6 | 26 | 0.91 | 51 | 1 |
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| 2020 | 34.3 | 17 | 44.4 | 28 | 24.2 | 13 | 1.79 | 24 | 0 |
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| 2019 | 34.1 | 18 | 45.9 | 20 | 22.4 | 23 | 1.99 | 18 | 0 |
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| 2018 | 37.2 | 5 | 48.5 | 10 | 25.9 | 9 | 1.33 | 38 | 0 |
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| 2017 | 26.2 | 64 | 36.4 | 80 | 16 | 56 | 3.26 | 6 | 0 |
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| 2016 | 32.2 | 32 | 40.7 | 60 | 23.7 | 15 | 2.00 | 17 | 0 |
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| 2015 | 37.7 | 3 | 52.1 | 4 | 23.4 | 16 | 0.11 | 85 | 0 |
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| 2014 | 33.5 | 21 | 52.3 | 3 | 14.6 | 63 | 0.12 | 83 | 0 |
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| 2013 | | | | | 7.9 | 78 | 0.48 | 74 | 6 |
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| 2012 | 32 | 34 | 47.5 | 13 | 16.4 | 54 | 0.81 | 58 | 0 |
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| 2011 | 31.1 | 43 | 44.5 | 26 | 17.8 | 49 | 0.43 | 76 | 0 |
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| 2010 | 37.4 | 4 | 46.1 | 17 | 28.8 | 1 | 0.88 | 54 | 0 |
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| 2009 | 31.2 | 41 | 44 | 31 | 18.5 | 40 | 0.76 | 60 | 0 |
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| 2008 | 24 | 73 | 34 | 84 | 13.9 | 65 | 1.83 | 22 | 0 |
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| 2007 | 25.6 | 67 | 40.3 | 62 | 10.9 | 75 | 0.44 | 75 | 0 |
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| 2006 | 32.9 | 26 | 41.8 | 51 | 24 | 14 | 1.45 | 34 | 0 |
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| 2005 | 29.7 | 51 | 41.6 | 54 | 17.8 | 49 | 0.67 | 64 | 0 |
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| 2004 | 32.3 | 31 | 41.8 | 51 | 22.8 | 20 | 1.10 | 42 | 0 |
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| 2003 | 40.5 | 1 | 52.5 | 2 | 28.5 | 2 | 0.99 | 46 | 0 |
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| 2002 | 28.4 | 56 | 40.3 | 62 | 16.5 | 53 | 0.86 | 56 | 0 |
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| 2001 | 30.3 | 48 | 44.4 | 28 | 16.2 | 55 | 0.41 | 77 | 0 |
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| 2000 | 33.1 | 25 | 42.7 | 43 | 23.4 | 16 | 2.17 | 15 | 0 |
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| 1999 | 31.4 | 40 | 43 | 40 | 19.8 | 34 | 1.51 | 31 | 0 |
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| 1998 | 35.6 | 10 | 44.5 | 26 | 26.8 | 6 | 2.84 | 12 | 0 |
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| 1997 | 31.5 | 39 | 42.5 | 45 | 20.5 | 32 | 3.20 | 7 | 0 |
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| 1996 | 32.8 | 28 | 42.8 | 42 | 22.8 | 20 | 2.89 | 11 | 0 |
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| 1995 | 34.8 | 15 | 42.4 | 46 | 27 | 4 | 2.19 | 14 | 2 |
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| 1994 | 33.2 | 24 | 47 | 15 | 19.4 | 36 | 0.26 | 81 | 0 |
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| 1993 | | | 36.8 | 78 | | | 2.90 | 10 | 5 |
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| 1992 | 32.9 | 26 | 47.1 | 14 | 18.4 | 44 | 0.12 | 83 | 3 |
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| 1991 | | | 43.1 | 38 | | | 0.53 | 72 | 4 |
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| 1990 | | | 43.2 | 37 | | | 0.91 | 51 | 5 |
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| 1989 | | | 35 | 81 | | | 1.28 | 39 | 5 |
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| 1988 | | | 38.7 | 68 | | | 1.65 | 28 | 4 |
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| 1987 | 28.6 | 55 | 41.9 | 50 | 15.1 | 59 | 0.89 | 53 | 3 |
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| 1986 | 38.8 | 2 | 49.6 | 7 | 27.8 | 3 | 0.98 | 47 | 2 |
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| 1985 | | | 43.1 | 38 | | | 0.52 | 73 | 5 |
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| 1984 | 31.6 | 38 | 45.1 | 22 | 18.2 | 45 | 0.19 | 82 | 0 |
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| 1983 | 33.8 | 19 | 45 | 23 | 22.5 | 22 | 0.61 | 67 | 2 |
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| 1982 | 25.3 | 69 | 37.9 | 75 | 12.5 | 70 | 0.80 | 59 | 1 |
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| 1981 | 35.5 | 12 | 49.8 | 6 | 21.3 | 28 | 0.92 | 50 | 0 |
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| 1980 | | | 44.6 | 25 | 21.9 | 25 | 3.65 | 3 | 4 |
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| 1979 | 24.6 | 72 | 37.5 | 77 | 11.8 | 73 | 0.87 | 55 | 0 |
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| 1978 | 35.7 | 8 | 44.3 | 30 | 27 | 4 | 0.70 | 63 | 0 |
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| 1977 | 14.6 | 78 | 32.7 | 85 | -3.5 | 81 | 1.06 | 44 | 0 |
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| 1976 | 32.1 | 33 | 44.8 | 24 | 19.4 | 36 | 0.39 | 78 | 0 |
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| 1975 | 26.9 | 61 | 38.9 | 67 | 13.6 | 66 | 0.59 | 69 | 2 |
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| 1974 | 25.5 | 68 | 38.2 | 70 | 12.9 | 67 | 1.72 | 26 | 1 |
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| 1973 | 26.5 | 63 | 38.2 | 70 | 14.8 | 61 | 1.49 | 32 | 0 |
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| 1972 | 25.3 | 69 | 38.1 | 73 | 12.5 | 70 | 1.53 | 30 | 0 |
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| 1971 | 30 | 49 | 41.8 | 51 | 18.6 | 38 | 0.27 | 80 | 1 |
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| 1970 | 31.8 | 37 | 40.8 | 56 | 22.9 | 19 | 3.65 | 3 | 1 |
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| 1969 | 29.8 | 50 | 40.7 | 60 | 18.5 | 40 | 4.17 | 1 | 1 |
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| 1968 | 26 | 65 | 40.8 | 56 | 10.8 | 76 | 1.88 | 20 | 1 |
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| 1967 | 30.6 | 46 | 43.3 | 36 | 18 | 47 | 3.05 | 8 | 3 |
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| 1966 | 29.5 | 52 | 42.3 | 47 | 16.8 | 51 | 0.93 | 49 | 0 |
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| 1965 | 30.9 | 44 | 42.1 | 48 | 19.6 | 35 | 2.95 | 9 | 0 |
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| 1964 | 28.4 | 56 | 42.6 | 44 | 14.8 | 61 | 1.89 | 19 | 1 |
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| 1963 | 29.5 | 52 | 49 | 8 | 10 | 77 | 0.60 | 68 | 0 |
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| 1962 | 23.6 | 76 | 40.8 | 56 | 6.5 | 79 | 1.12 | 40 | 0 |
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| 1961 | 36.1 | 7 | 56.7 | 1 | 15.5 | 57 | 0.10 | 87 | 0 |
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| 1960 | 26.7 | 62 | 38.2 | 70 | 15.3 | 58 | 1.74 | 25 | 0 |
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| 1959 | 35.4 | 13 | 46.2 | 16 | 25 | 11 | 1.11 | 41 | 2 |
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| 1958 | 34.7 | 16 | 46.1 | 17 | 23.3 | 18 | 1.85 | 21 | 0 |
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| 1957 | | | | | | | | | 4 |
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| 1956 | 32 | 34 | 41.6 | 54 | 22.4 | 23 | | | 0 |
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| 1955 | 21.4 | 77 | 36.7 | 79 | 6.1 | 80 | 0.67 | 64 | 2 |
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| 1954 | | | | | 20.8 | 30 | 1.48 | 33 | 4 |
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| 1953 | | | | | | | | | 9 |
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| 1952 | 23.8 | 75 | 34.8 | 83 | 12.8 | 69 | 1.80 | 23 | 0 |
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| 1951 | 30.5 | 47 | 40.8 | 56 | 20.2 | 33 | 1.40 | 36 | 0 |
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| 1950 | 23.9 | 74 | 34.9 | 82 | 12.9 | 67 | 2.32 | 13 | 2 |
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| 1949 | 8.6 | 79 | 25.9 | 86 | -8.7 | 82 | 0.63 | 66 | 0 |
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| 1948 | 33.6 | 20 | 48.7 | 9 | 18.5 | 40 | 0.84 | 57 | 0 |
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| 1947 | 25.7 | 66 | 40.1 | 65 | 11.3 | 74 | 0.31 | 79 | 0 |
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| 1946 | 29 | 54 | 42.9 | 41 | 15 | 60 | 0.72 | 61 | 0 |
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| 1945 | 32.7 | 29 | 43.9 | 33 | 21.5 | 27 | 0.54 | 71 | 0 |
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| 1944 | 25 | 71 | 37.8 | 76 | 12.3 | 72 | 0.96 | 48 | 0 |
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| 1943 | 28.1 | 58 | 38.1 | 73 | 18.6 | 38 | 3.68 | 2 | 2 |
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| 1942 | 27.4 | 60 | 40 | 66 | 14.6 | 63 | 2.16 | 16 | 3 |
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| 1941 | 33.4 | 22 | 42 | 49 | 24.7 | 12 | 1.35 | 37 | 0 |
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| 1940 | 35.7 | 8 | 45.4 | 21 | 26 | 8 | 1.70 | 27 | 0 |
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| 1939 | 31.2 | 41 | 43.8 | 34 | 18.5 | 40 | 1.07 | 43 | 0 |
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| 1938 | 36.5 | 6 | 47.7 | 12 | 25.3 | 10 | 1.01 | 45 | 1 |
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| 1937 | | | | | | | | | 13 |
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| 1936 | 30.7 | 45 | 40.3 | 62 | 21 | 29 | 3.48 | 5 | 1 |
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