Every 1 to 9 October in Olympia, WA from 1948 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 | 57.3 | 11 | 69.7 | 7 | 44.9 | 18 | 0.00 | 76 | 0 |
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| 2025 | 54.8 | 25 | 66.9 | 26 | 42.7 | 36 | 0.32 | 48 | 0 |
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| 2024 | 54.8 | 25 | 68.9 | 15 | 40.8 | 47 | 0.65 | 41 | 0 |
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| 2023 | 57.7 | 8 | 69.4 | 10 | 45.9 | 10 | 0.36 | 46 | 0 |
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| 2022 | 60.7 | 1 | 75.7 | 1 | 45.7 | 12 | 0.00 | 76 | 0 |
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| 2021 | 50.5 | 69 | 61.6 | 62 | 39.4 | 60 | 0.39 | 44 | 0 |
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| 2020 | 58.6 | 4 | 68.3 | 19 | 48.9 | 3 | 0.71 | 38 | 0 |
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| 2019 | 48.5 | 78 | 60 | 70 | 37 | 69 | 1.02 | 30 | 0 |
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| 2018 | 49.7 | 73 | 58.2 | 78 | 41.2 | 43 | 1.58 | 19 | 0 |
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| 2017 | 50.7 | 65 | 65.1 | 37 | 36.2 | 74 | 0.34 | 47 | 0 |
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| 2016 | 55.4 | 20 | 60.7 | 66 | 50.1 | 2 | 1.85 | 12 | 0 |
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| 2015 | 56 | 16 | 68.3 | 19 | 43.7 | 28 | 0.52 | 42 | 0 |
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| 2014 | 58.1 | 6 | 70.9 | 5 | 45.3 | 14 | trace | 69 | 0 |
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| 2013 | 51.1 | 61 | 61.2 | 64 | 41 | 44 | 1.79 | 13 | 0 |
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| 2012 | 51.7 | 54 | 70.7 | 6 | 32.8 | 79 | 0.00 | 76 | 0 |
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| 2011 | 53.7 | 34 | 60.7 | 66 | 46.8 | 7 | 1.18 | 26 | 0 |
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| 2010 | 54.3 | 29 | 64.4 | 41 | 44.1 | 21 | 1.17 | 27 | 0 |
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| 2009 | 49.9 | 72 | 63.7 | 47 | 36.1 | 75 | 0.11 | 57 | 0 |
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| 2008 | 53.3 | 37 | 60.6 | 69 | 46.1 | 9 | 2.03 | 11 | 0 |
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| 2007 | 50.7 | 65 | 57.2 | 79 | 44.1 | 21 | 1.75 | 15 | 0 |
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| 2006 | 53.1 | 42 | 63.6 | 49 | 42.6 | 38 | 0.15 | 55 | 0 |
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| 2005 | 51.4 | 57 | 59.7 | 73 | 43.1 | 32 | 1.40 | 22 | 0 |
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| 2004 | 55.6 | 17 | 66.1 | 29 | 45 | 17 | 1.70 | 16 | 0 |
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| 2003 | 55.3 | 22 | 63.3 | 50 | 47.3 | 5 | 0.98 | 32 | 0 |
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| 2002 | 53.6 | 35 | 62 | 58 | 45.1 | 16 | 0.26 | 51 | 0 |
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| 2001 | 51.2 | 59 | 65.8 | 31 | 36.7 | 71 | 0.12 | 56 | 0 |
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| 2000 | 51.9 | 52 | 66.1 | 29 | 37.8 | 64 | 0.80 | 35 | 0 |
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| 1999 | 52 | 51 | 63.7 | 47 | 40.3 | 52 | 1.43 | 21 | 0 |
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| 1998 | 54.2 | 30 | 64.2 | 42 | 44.2 | 20 | 1.23 | 25 | 0 |
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| 1997 | 52.2 | 48 | 59.1 | 76 | 45.2 | 15 | 3.45 | 3 | 0 |
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| 1996 | 56.9 | 13 | 69.1 | 13 | 44.8 | 19 | 0.80 | 35 | 0 |
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| 1995 | 54.2 | 30 | 64.6 | 40 | 43.9 | 23 | 0.67 | 40 | 0 |
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| 1994 | 52.7 | 45 | 68.8 | 17 | 36.6 | 73 | 0.02 | 67 | 0 |
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| 1993 | 56.2 | 15 | 69.7 | 7 | 42.7 | 36 | 0.08 | 61 | 0 |
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| 1992 | 53.5 | 36 | 65.4 | 34 | 41.6 | 42 | 0.10 | 58 | 0 |
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| 1991 | 53.2 | 39 | 69 | 14 | 37.4 | 68 | trace | 69 | 0 |
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| 1990 | 51.2 | 59 | 62.7 | 55 | 39.7 | 58 | 1.08 | 29 | 0 |
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| 1989 | 53.1 | 42 | 66.8 | 27 | 39.3 | 61 | 0.01 | 68 | 0 |
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| 1988 | 58 | 7 | 65.7 | 33 | 50.3 | 1 | 0.08 | 61 | 0 |
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| 1987 | 59.1 | 3 | 75.3 | 3 | 42.8 | 35 | trace | 69 | 0 |
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| 1986 | 53.8 | 33 | 64.1 | 43 | 43.4 | 29 | trace | 69 | 0 |
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| 1985 | 49.1 | 75 | 62.6 | 56 | 35.7 | 78 | 0.30 | 49 | 0 |
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| 1984 | 57.4 | 10 | 68.1 | 22 | 46.8 | 7 | 0.84 | 33 | 0 |
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| 1983 | 50.4 | 70 | 63.1 | 52 | 37.8 | 64 | 0.05 | 65 | 0 |
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| 1982 | 51.4 | 57 | 63.2 | 51 | 39.6 | 59 | 1.11 | 28 | 0 |
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| 1981 | 52.1 | 49 | 62 | 58 | 42.1 | 40 | 6.10 | 1 | 0 |
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| 1980 | 59.8 | 2 | 75.7 | 1 | 43.9 | 23 | trace | 69 | 0 |
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| 1979 | 55.1 | 24 | 69.7 | 7 | 40.4 | 50 | trace | 69 | 0 |
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| 1978 | 54.6 | 27 | 68.2 | 21 | 41 | 44 | 0.07 | 63 | 0 |
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| 1977 | 48.6 | 77 | 61 | 65 | 36.1 | 75 | 0.18 | 54 | 0 |
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| 1976 | 54.4 | 28 | 65.8 | 31 | 43 | 34 | 0.26 | 51 | 0 |
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| 1975 | 53.2 | 39 | 62.4 | 57 | 43.9 | 23 | 2.52 | 7 | 0 |
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| 1974 | 53.2 | 39 | 68.9 | 15 | 37.6 | 67 | 0.05 | 65 | 0 |
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| 1973 | 47.5 | 79 | 58.9 | 77 | 36.1 | 75 | 1.67 | 17 | 0 |
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| 1972 | 50.7 | 65 | 64.7 | 39 | 36.8 | 70 | 0.09 | 60 | 0 |
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| 1971 | 57.6 | 9 | 69.3 | 11 | 45.8 | 11 | 0.00 | 76 | 0 |
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| 1970 | 52.1 | 49 | 63.1 | 52 | 41 | 44 | 0.20 | 53 | 0 |
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| 1969 | 51.5 | 56 | 63 | 54 | 40 | 53 | 2.19 | 8 | 0 |
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| 1968 | 48.7 | 76 | 60.7 | 66 | 36.7 | 71 | 1.01 | 31 | 0 |
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| 1967 | 55.5 | 19 | 63.9 | 46 | 47.1 | 6 | 3.13 | 4 | 0 |
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| 1966 | 52.6 | 46 | 65.1 | 37 | 40 | 53 | 0.10 | 58 | 0 |
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| 1965 | 55.6 | 17 | 67.4 | 23 | 43.8 | 27 | 1.56 | 20 | 0 |
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| 1964 | 53.3 | 37 | 67.4 | 23 | 39.2 | 62 | 0.71 | 38 | 0 |
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| 1963 | 55.4 | 20 | 65.4 | 34 | 45.4 | 13 | 0.48 | 43 | 0 |
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| 1962 | 50.4 | 70 | 62 | 58 | 38.8 | 63 | 4.09 | 2 | 0 |
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| 1961 | 50.9 | 63 | 64.1 | 43 | 37.8 | 64 | 0.83 | 34 | 0 |
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| 1960 | 51.9 | 52 | 64 | 45 | 39.9 | 56 | 0.77 | 37 | 0 |
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| 1959 | 50.7 | 65 | 61.3 | 63 | 40 | 53 | 0.37 | 45 | 0 |
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| 1958 | 55.2 | 23 | 66.6 | 28 | 43.9 | 23 | 1.29 | 23 | 0 |
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| 1957 | 51.6 | 55 | 59.7 | 73 | 43.4 | 29 | 1.29 | 23 | 0 |
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| 1956 | 53.9 | 32 | 67.2 | 25 | 40.7 | 48 | 0.06 | 64 | 0 |
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| 1955 | 51.1 | 61 | 59.9 | 72 | 42.2 | 39 | 3.05 | 5 | 0 |
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| 1954 | 52.4 | 47 | 61.7 | 61 | 43.1 | 32 | 0.29 | 50 | 0 |
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| 1953 | 56.3 | 14 | 69.2 | 12 | 43.4 | 29 | 2.15 | 9 | 0 |
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| 1952 | 57.3 | 11 | 74.1 | 4 | 40.6 | 49 | trace | 69 | 0 |
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| 1951 | 58.2 | 5 | 68.4 | 18 | 48 | 4 | 1.67 | 17 | 0 |
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| 1950 | 50.9 | 63 | 60 | 70 | 41.9 | 41 | 2.97 | 6 | 0 |
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| 1949 | 49.5 | 74 | 59.2 | 75 | 39.8 | 57 | 1.79 | 13 | 0 |
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| 1948 | 52.8 | 44 | 65.2 | 36 | 40.4 | 50 | 2.08 | 10 | 0 |
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