Every April 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 | 45 | 32 | 60.9 | 32 | 29.1 | 34 | 1.26 | 36 | 0 |
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| 2025 | 45.8 | 24 | 62.1 | 27 | 29.6 | 29 | 1.49 | 25 | 0 |
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| 2024 | 44.4 | 38 | 59.5 | 44 | 29.2 | 33 | 1.58 | 21 | 0 |
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| 2023 | 43.5 | 51 | 59.5 | 44 | 27.6 | 57 | 0.53 | 70 | 0 |
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| 2022 | 41.1 | 69 | 56.9 | 58 | 25.3 | 79 | 1.31 | 35 | 0 |
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| 2021 | 45.3 | 31 | 64.6 | 13 | 26 | 74 | 0.48 | 75 | 0 |
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| 2020 | 46.1 | 22 | 62.5 | 25 | 29.7 | 25 | 1.10 | 42 | 0 |
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| 2019 | 47.9 | 8 | 60.9 | 32 | 34.8 | 1 | 2.24 | 9 | 0 |
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| 2018 | 44.9 | 33 | 59.2 | 46 | 30.5 | 19 | 2.88 | 3 | 0 |
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| 2017 | 44.1 | 45 | 56.3 | 62 | 31.7 | 8 | 1.51 | 24 | 1 |
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| 2016 | 49.1 | 2 | 64.7 | 12 | 33.1 | 3 | 1.32 | 34 | 2 |
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| 2015 | 44.3 | 41 | 62.9 | 21 | 25.8 | 76 | 0.55 | 69 | 0 |
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| 2014 | 46.8 | 17 | 63.3 | 18 | 30.2 | 22 | 0.62 | 64 | 0 |
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| 2013 | 44.3 | 41 | 60 | 39 | 28.6 | 45 | 1.44 | 28 | 0 |
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| 2012 | 45.5 | 30 | 59.9 | 41 | 31.1 | 13 | 1.64 | 17 | 0 |
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| 2011 | 39.6 | 76 | 52.3 | 77 | 26.8 | 67 | 2.69 | 5 | 0 |
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| 2010 | 40.5 | 73 | 54.7 | 70 | 26.2 | 70 | 1.17 | 38 | 0 |
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| 2009 | 42.5 | 59 | 58.3 | 54 | 26.8 | 67 | 1.77 | 14 | 0 |
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| 2008 | 40 | 74 | 57 | 57 | 22.9 | 85 | 0.52 | 71 | 0 |
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| 2007 | 44.7 | 34 | 60.5 | 35 | 28.9 | 38 | 1.52 | 23 | 0 |
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| 2006 | 43.8 | 48 | 55.9 | 66 | 31.6 | 9 | 1.85 | 12 | 0 |
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| 2005 | 43 | 54 | 56.2 | 63 | 29.7 | 25 | 1.79 | 13 | 0 |
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| 2004 | 45.7 | 26 | 62.7 | 23 | 28.8 | 40 | 0.91 | 53 | 0 |
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| 2003 | 39.4 | 77 | 50 | 82 | 28.7 | 42 | 2.25 | 8 | 0 |
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| 2002 | 44.7 | 34 | 59.7 | 42 | 29.7 | 25 | 1.49 | 25 | 0 |
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| 2001 | 40.6 | 71 | 55.1 | 68 | 26.1 | 71 | 1.59 | 20 | 0 |
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| 2000 | 47.2 | 15 | 63.3 | 18 | 31.2 | 11 | 1.39 | 31 | 0 |
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| 1999 | 42.6 | 57 | 56 | 65 | 29.1 | 34 | 0.28 | 83 | 0 |
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| 1998 | 42.8 | 56 | 57.7 | 56 | 27.8 | 55 | 0.59 | 66 | 0 |
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| 1997 | 43.7 | 50 | 59 | 48 | 28.3 | 49 | 1.12 | 40 | 1 |
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| 1996 | | | | | | | 1.04 | 44 | 4 |
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| 1995 | | | | | 28 | 51 | 3.24 | 1 | 8 |
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| 1994 | 45.6 | 28 | 62.4 | 26 | 28.7 | 42 | 0.78 | 58 | 0 |
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| 1993 | 42.1 | 63 | 54.7 | 70 | 30.3 | 21 | 1.41 | 30 | 2 |
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| 1992 | 47.5 | 12 | 64.3 | 15 | 31.2 | 11 | 0.57 | 68 | 3 |
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| 1991 | 41.2 | 67 | 54.9 | 69 | 27.9 | 53 | 1.43 | 29 | 1 |
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| 1990 | 49.2 | 1 | 65.8 | 7 | 32.4 | 6 | 0.59 | 66 | 2 |
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| 1989 | 46.6 | 19 | 64.2 | 17 | 29.1 | 34 | 0.61 | 65 | 1 |
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| 1988 | | | 61.3 | 31 | 30.7 | 17 | 2.57 | 6 | 4 |
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| 1987 | 47.6 | 11 | 67.6 | 4 | 27.5 | 60 | 1.09 | 43 | 0 |
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| 1986 | 43.8 | 48 | 58.3 | 54 | 29.3 | 30 | 2.13 | 10 | 0 |
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| 1985 | 46.6 | 19 | 65.3 | 9 | 27.8 | 55 | 0.34 | 80 | 0 |
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| 1984 | 40.7 | 70 | 53.5 | 74 | 27.9 | 53 | 1.00 | 47 | 0 |
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| 1983 | 38.9 | 79 | 51.9 | 78 | 26.1 | 71 | 1.63 | 18 | 1 |
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| 1982 | 38.1 | 80 | 52.8 | 76 | 23.4 | 84 | 0.45 | 78 | 0 |
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| 1981 | 44.4 | 38 | 60.2 | 37 | 28.6 | 45 | 0.79 | 57 | 0 |
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| 1980 | 44.4 | 38 | 60.1 | 38 | 28.8 | 40 | 0.75 | 60 | 0 |
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| 1979 | 42.2 | 61 | 56.2 | 63 | 28.1 | 50 | 1.34 | 33 | 0 |
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| 1978 | 41.6 | 64 | 53.3 | 75 | 29.8 | 24 | 2.98 | 2 | 0 |
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| 1977 | 45.6 | 28 | 64.4 | 14 | 26.8 | 67 | 0.11 | 90 | 0 |
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| 1976 | 41.3 | 66 | 56.5 | 61 | 26.1 | 71 | 0.16 | 89 | 0 |
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| 1975 | 34.4 | 83 | 45.9 | 84 | 22.9 | 85 | 1.45 | 27 | 0 |
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| 1974 | 39.8 | 75 | 54.7 | 70 | 25 | 81 | 0.50 | 73 | 0 |
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| 1973 | 42.2 | 61 | 58.4 | 53 | 26 | 74 | 1.61 | 19 | 0 |
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| 1972 | 41.2 | 67 | 55.2 | 67 | 27.1 | 65 | 0.99 | 48 | 0 |
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| 1971 | 42.3 | 60 | 56.6 | 59 | 28 | 51 | 0.92 | 52 | 0 |
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| 1970 | 37.5 | 81 | 51.2 | 80 | 23.8 | 83 | 0.84 | 55 | 0 |
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| 1969 | 44.5 | 37 | 61.5 | 30 | 27.6 | 57 | 0.76 | 59 | 0 |
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| 1968 | 44 | 46 | 62.7 | 23 | 25.3 | 79 | 0.20 | 86 | 0 |
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| 1967 | 36.5 | 82 | 48.2 | 83 | 25 | 81 | 1.53 | 22 | 2 |
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| 1966 | 47.3 | 14 | 69.1 | 3 | 25.4 | 78 | 0.67 | 63 | 0 |
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| 1965 | 45.8 | 24 | 58.9 | 50 | 32.6 | 5 | 1.76 | 15 | 0 |
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| 1964 | 43.2 | 52 | 60.7 | 34 | 25.6 | 77 | 0.42 | 79 | 0 |
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| 1963 | 39.1 | 78 | 50.8 | 81 | 27.3 | 62 | 2.72 | 4 | 0 |
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| 1962 | 48.9 | 5 | 69.5 | 1 | 28.4 | 48 | 0.25 | 85 | 0 |
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| 1961 | 45.7 | 26 | 64.3 | 15 | 27.1 | 65 | 0.18 | 88 | 0 |
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| 1960 | 44.3 | 41 | 60 | 39 | 28.6 | 45 | 0.99 | 48 | 0 |
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| 1959 | 48.5 | 6 | 69.4 | 2 | 27.6 | 57 | 0.20 | 86 | 0 |
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| 1958 | 44 | 46 | 59 | 48 | 28.9 | 38 | 0.47 | 77 | 0 |
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| 1957 | 44.3 | 41 | 59.6 | 43 | 29 | 37 | 1.16 | 39 | 0 |
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| 1956 | 46.8 | 17 | 63.1 | 20 | 30.4 | 20 | 0.93 | 51 | 0 |
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| 1955 | | | | | | | | | 10 |
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| 1954 | 48.1 | 7 | 65.6 | 8 | 30.6 | 18 | 1.12 | 40 | 3 |
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| 1953 | | | | | | | 0.85 | 54 | 6 |
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| 1952 | | | | | | | 0.83 | 56 | 4 |
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| 1951 | 49 | 3 | 66.1 | 6 | 31.8 | 7 | 1.24 | 37 | 0 |
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| 1950 | 44.7 | 34 | 62 | 28 | 27.3 | 62 | 0.72 | 61 | 0 |
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| 1949 | 47.5 | 12 | 64.9 | 10 | 30.1 | 23 | 0.31 | 81 | 2 |
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| 1948 | 40.6 | 71 | 51.9 | 78 | 29.3 | 30 | 2.47 | 7 | 0 |
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| 1947 | 47 | 16 | 62.9 | 21 | 31 | 14 | 0.69 | 62 | 0 |
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| 1946 | 47.9 | 8 | 64.8 | 11 | 31 | 14 | 0.48 | 75 | 0 |
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| 1945 | 43 | 54 | 58.8 | 52 | 27.2 | 64 | 0.49 | 74 | 0 |
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| 1944 | 41.6 | 64 | 53.9 | 73 | 29.3 | 30 | 1.99 | 11 | 0 |
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| 1943 | 47.7 | 10 | 60.5 | 35 | 34.8 | 1 | 1.72 | 16 | 0 |
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| 1942 | 43.2 | 52 | 59.1 | 47 | 27.4 | 61 | 1.37 | 32 | 0 |
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| 1941 | | | | | | | 0.51 | 72 | 5 |
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| 1940 | 46.5 | 21 | 61.6 | 29 | 31.4 | 10 | 1.03 | 46 | 0 |
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| 1939 | 49 | 3 | 67.1 | 5 | 30.9 | 16 | 0.28 | 83 | 0 |
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| 1938 | 46 | 23 | 58.9 | 50 | 33 | 4 | 1.04 | 44 | 0 |
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| 1937 | 42.6 | 57 | 56.6 | 59 | 28.7 | 42 | 0.97 | 50 | 0 |
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| 1936 | | | | | 29.7 | 25 | 0.29 | 82 | 5 |
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