Every July in Lancaster, CA from 1945 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 | 84.4 | 20 | 99.1 | 28 | 69.7 | 11 | 0.00 | 45 | 0 |
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| 2025 | 81.1 | 47 | 95.9 | 62 | 66.2 | 42 | 0.00 | 45 | 0 |
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| 2024 | 88.1 | 1 | 104.9 | 1 | 71.3 | 4 | trace | 29 | 0 |
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| 2023 | 86.8 | 5 | 102.4 | 4 | 71.3 | 4 | 0.00 | 45 | 0 |
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| 2022 | 85.6 | 8 | 100.4 | 19 | 70.9 | 7 | trace | 29 | 0 |
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| 2021 | 87.3 | 2 | 101.8 | 7 | 72.7 | 1 | 0.04 | 18 | 0 |
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| 2020 | 82 | 39 | 98.5 | 35 | 65.5 | 48 | 0.00 | 45 | 0 |
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| 2019 | 82.5 | 37 | 97.8 | 42 | 67.2 | 31 | 0.04 | 18 | 0 |
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| 2018 | 87.2 | 3 | 102 | 6 | 72.4 | 2 | 0.02 | 20 | 0 |
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| 2017 | 87 | 4 | 102.4 | 4 | 71.6 | 3 | trace | 29 | 0 |
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| 2016 | 84.5 | 18 | 99.9 | 22 | 69.1 | 18 | 0.00 | 45 | 0 |
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| 2015 | 79.4 | 69 | 92.9 | 76 | 65.8 | 45 | 2.34 | 1 | 0 |
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| 2014 | 83.7 | 25 | 97.8 | 42 | 69.6 | 13 | trace | 29 | 0 |
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| 2013 | 85 | 12 | 100 | 21 | 69.9 | 10 | 0.02 | 20 | 0 |
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| 2012 | 80.9 | 50 | 97 | 49 | 64.9 | 52 | trace | 29 | 0 |
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| 2011 | 80.5 | 58 | 96.1 | 59 | 65 | 51 | 0.22 | 8 | 0 |
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| 2010 | 83.7 | 25 | 98.8 | 32 | 68.5 | 22 | trace | 29 | 0 |
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| 2009 | 85 | 12 | 101.1 | 13 | 68.9 | 19 | 0.00 | 45 | 0 |
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| 2008 | 84.6 | 16 | 99.5 | 25 | 69.7 | 11 | trace | 29 | 0 |
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| 2007 | 84.3 | 22 | 100.5 | 18 | 68.2 | 25 | trace | 29 | 0 |
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| 2006 | 85.8 | 7 | 101.6 | 9 | 70 | 9 | 0.02 | 20 | 0 |
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| 2005 | 85.4 | 9 | 101.1 | 13 | 69.6 | 13 | 0.16 | 10 | 0 |
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| 2004 | 82.7 | 35 | 98.5 | 35 | 66.9 | 34 | 0.00 | 45 | 0 |
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| 2003 | 86.2 | 6 | 101.7 | 8 | 70.7 | 8 | 0.11 | 15 | 0 |
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| 2002 | 84.4 | 20 | 100.9 | 17 | 67.9 | 27 | 0.00 | 45 | 0 |
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| 2001 | 80.7 | 52 | 95.8 | 66 | 65.7 | 46 | 0.02 | 20 | 0 |
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| 2000 | 79.8 | 64 | 94.9 | 71 | 64.7 | 57 | 0.00 | 45 | 0 |
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| 1999 | 79.3 | 70 | 93.7 | 74 | 64.8 | 54 | 0.95 | 2 | 0 |
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| 1998 | 80.6 | 57 | 96.3 | 56 | 64.9 | 52 | 0.00 | 45 | 0 |
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| 1997 | 78.5 | 75 | 94.3 | 73 | 62.8 | 69 | 0.02 | 20 | 0 |
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| 1996 | 85.2 | 10 | 99.4 | 26 | 71 | 6 | 0.02 | 20 | 0 |
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| 1995 | 79.6 | 65 | 95.9 | 62 | 63.3 | 67 | trace | 29 | 0 |
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| 1994 | 83 | 32 | 97.2 | 46 | 68.7 | 20 | 0.00 | 45 | 0 |
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| 1993 | 77 | 79 | 89.5 | 81 | 64.4 | 60 | 0.00 | 45 | 0 |
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| 1992 | 78.4 | 76 | 91.5 | 78 | 65.3 | 49 | 0.08 | 16 | 0 |
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| 1991 | 80.7 | 52 | 94.5 | 72 | 66.8 | 35 | 0.13 | 13 | 0 |
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| 1990 | 82.7 | 35 | 96.3 | 56 | 69.2 | 17 | 0.00 | 45 | 0 |
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| 1989 | 83.4 | 28 | 98.8 | 32 | 68 | 26 | 0.00 | 45 | 0 |
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| 1988 | 83.8 | 23 | 98.2 | 40 | 69.3 | 16 | 0.02 | 20 | 0 |
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| 1987 | 75.7 | 81 | 91.1 | 80 | 60.3 | 79 | trace | 29 | 0 |
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| 1986 | 77.2 | 78 | 91.7 | 77 | 62.8 | 69 | 0.16 | 10 | 0 |
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| 1985 | 83.8 | 23 | 98.3 | 38 | 69.4 | 15 | trace | 29 | 0 |
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| 1984 | 82.9 | 33 | 97.2 | 46 | 68.5 | 22 | 0.70 | 4 | 0 |
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| 1983 | 76 | 80 | 91.5 | 78 | 60.4 | 78 | 0.00 | 45 | 0 |
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| 1982 | 80 | 63 | 93.5 | 75 | 66.6 | 37 | 0.00 | 45 | 0 |
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| 1981 | 82.2 | 38 | 96.9 | 50 | 67.5 | 28 | 0.00 | 45 | 0 |
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| 1980 | 81.6 | 42 | 96.8 | 51 | 66.5 | 38 | trace | 29 | 0 |
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| 1979 | 80.5 | 58 | 95.3 | 69 | 65.7 | 46 | 0.00 | 45 | 0 |
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| 1978 | 80.1 | 62 | 95.9 | 62 | 64.3 | 62 | 0.20 | 9 | 0 |
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| 1977 | 81.6 | 42 | 96.2 | 58 | 67.1 | 32 | 0.00 | 45 | 0 |
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| 1976 | 81.3 | 45 | 95.6 | 67 | 67.1 | 32 | trace | 29 | 0 |
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| 1975 | 80.2 | 60 | 95.5 | 68 | 64.8 | 54 | 0.01 | 28 | 0 |
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| 1974 | 80.7 | 52 | 95.3 | 69 | 66.1 | 43 | 0.71 | 3 | 0 |
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| 1972 | 81.4 | 44 | 99.2 | 27 | 63.6 | 65 | 0.00 | 45 | 0 |
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| 1971 | 81.7 | 41 | 99 | 29 | 64.4 | 60 | trace | 29 | 0 |
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| 1970 | 83.7 | 25 | 101.4 | 12 | 66 | 44 | trace | 29 | 0 |
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| 1969 | 80.7 | 52 | 97.8 | 42 | 63.6 | 65 | 0.14 | 12 | 0 |
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| 1968 | 81 | 48 | 97.3 | 45 | 64.8 | 54 | 0.63 | 5 | 0 |
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| 1967 | 83.1 | 30 | 99.7 | 24 | 66.4 | 39 | 0.00 | 45 | 0 |
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| 1966 | 78.7 | 73 | 96.1 | 59 | 61.3 | 76 | 0.00 | 45 | 0 |
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| 1965 | 78 | 77 | 96.5 | 54 | 59.6 | 80 | 0.27 | 7 | 0 |
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| 1964 | 81 | 48 | 98.1 | 41 | 63.9 | 64 | 0.00 | 45 | 0 |
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| 1963 | 79.5 | 67 | 96.4 | 55 | 62.5 | 72 | 0.00 | 45 | 0 |
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| 1962 | 79.6 | 65 | 96.8 | 51 | 62.4 | 73 | 0.00 | 45 | 0 |
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| 1961 | 84.6 | 16 | 101.6 | 9 | 67.5 | 28 | 0.00 | 45 | 0 |
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| 1960 | 83.1 | 30 | 101.1 | 13 | 65.2 | 50 | 0.00 | 45 | 0 |
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| 1959 | 85 | 12 | 102.6 | 3 | 67.5 | 28 | 0.00 | 45 | 0 |
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| 1958 | 78.6 | 74 | 95.9 | 62 | 61.3 | 76 | 0.00 | 45 | 0 |
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| 1957 | 80.2 | 60 | 98.5 | 35 | 62 | 74 | trace | 29 | 0 |
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| 1956 | 79.3 | 70 | 96.7 | 53 | 61.9 | 75 | 0.00 | 45 | 0 |
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| 1955 | 79.5 | 67 | 96 | 61 | 62.9 | 68 | 0.00 | 45 | 0 |
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| 1954 | 84.8 | 15 | 101.1 | 13 | 68.5 | 22 | 0.13 | 13 | 0 |
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| 1953 | 85.1 | 11 | 101.6 | 9 | 68.6 | 21 | 0.00 | 45 | 0 |
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| 1952 | 81.8 | 40 | 98.9 | 30 | 64.7 | 57 | 0.06 | 17 | 0 |
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| 1951 | 83.3 | 29 | 100.3 | 20 | 66.4 | 39 | 0.00 | 45 | 0 |
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| 1950 | 82.9 | 33 | 98.9 | 30 | 66.8 | 35 | 0.02 | 20 | 0 |
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| 1949 | 81.3 | 45 | 98.3 | 38 | 64.2 | 63 | 0.00 | 45 | 0 |
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| 1948 | 80.7 | 52 | 98.7 | 34 | 62.6 | 71 | 0.00 | 45 | 0 |
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| 1947 | 78.9 | 72 | 99.8 | 23 | 58 | 81 | 0.00 | 45 | 0 |
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| 1946 | 80.8 | 51 | 97.1 | 48 | 64.5 | 59 | 0.35 | 6 | 0 |
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| 1945 | 84.5 | 18 | 102.8 | 2 | 66.3 | 41 | 0.00 | 45 | 0 |
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