Every February in Hillsboro, OR from 1930 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 | 43.4 | 27 | 51.8 | 30 | 35 | 32 | 5.50 | 20 | 0 |
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| 2025 | 40.6 | 70 | 48.3 | 68 | 33 | 65 | 3.42 | 59 | 0 |
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| 2024 | 44.3 | 19 | 51.3 | 34 | 37.2 | 13 | 4.03 | 45 | 0 |
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| 2023 | 38.9 | 85 | 47.1 | 85 | 30.6 | 87 | 2.12 | 80 | 0 |
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| 2022 | 41.5 | 56 | 50.8 | 41 | 32.2 | 74 | 3.04 | 66 | 0 |
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| 2021 | 40.3 | 74 | 46.8 | 86 | 33.8 | 53 | 3.91 | 48 | 0 |
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| 2020 | 41.7 | 54 | 51.3 | 34 | 32.2 | 74 | 1.49 | 90 | 0 |
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| 2019 | 36.9 | 89 | 42.9 | 92 | 31 | 82 | 4.96 | 28 | 0 |
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| 2018 | 40.6 | 70 | 48.4 | 67 | 32.7 | 67 | 2.15 | 79 | 0 |
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| 2017 | 41.4 | 58 | 48.1 | 72 | 34.6 | 39 | 10.06 | 4 | 0 |
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| 2016 | 46.2 | 9 | 53.9 | 13 | 38.4 | 10 | 3.96 | 47 | 0 |
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| 2015 | 47.6 | 5 | 56 | 4 | 39.2 | 7 | 4.57 | 33 | 0 |
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| 2014 | 38.6 | 87 | 45.2 | 91 | 32 | 77 | 5.06 | 26 | 0 |
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| 2013 | 42.1 | 46 | 50 | 51 | 34.1 | 46 | 1.87 | 85 | 0 |
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| 2012 | 42.1 | 46 | 49.1 | 62 | 35 | 32 | 2.48 | 74 | 1 |
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| 2011 | 38.6 | 87 | 45.7 | 89 | 31.4 | 80 | 3.83 | 51 | 1 |
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| 2010 | 45.5 | 13 | 53.9 | 13 | 37.1 | 14 | 4.06 | 43 | 0 |
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| 2009 | 39 | 84 | 49.5 | 59 | 28.6 | 93 | 1.08 | 93 | 0 |
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| 2008 | 41.8 | 51 | 51.1 | 37 | 32.5 | 70 | 1.49 | 90 | 0 |
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| 2007 | 43.6 | 25 | 50.7 | 42 | 36.4 | 19 | 3.80 | 52 | 0 |
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| 2006 | 40.4 | 73 | 49.6 | 58 | 31.3 | 81 | 1.99 | 82 | 0 |
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| 2005 | 41.3 | 61 | 53.4 | 17 | 29.3 | 92 | 0.68 | 96 | 0 |
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| 2004 | 43.8 | 22 | 51 | 40 | 36.5 | 18 | 4.27 | 39 | 0 |
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| 2003 | 42.9 | 31 | 51.8 | 30 | 33.9 | 50 | 2.93 | 70 | 0 |
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| 2002 | 42.3 | 42 | 51.5 | 33 | 33 | 65 | 3.13 | 65 | 0 |
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| 2001 | 39.9 | 79 | 50.4 | 44 | 29.5 | 91 | 1.58 | 89 | 0 |
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| 2000 | 42.3 | 42 | 49.7 | 56 | 34.9 | 34 | 4.35 | 36 | 0 |
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| 1999 | 42.3 | 42 | 48.6 | 66 | 36 | 25 | 9.78 | 6 | 0 |
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| 1998 | 46.6 | 7 | 52.9 | 19 | 40.5 | 3 | 6.64 | 12 | 1 |
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| 1997 | 42.5 | 39 | 50.6 | 43 | 34.5 | 42 | 2.03 | 81 | 1 |
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| 1996 | 41.2 | 64 | 49.9 | 53 | 32.6 | 68 | 10.23 | 1 | 0 |
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| 1995 | 46.2 | 9 | 55.2 | 8 | 36.7 | 16 | 3.47 | 58 | 1 |
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| 1994 | 39.9 | 79 | 47.9 | 75 | 31.8 | 78 | 5.06 | 26 | 2 |
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| 1993 | 39.6 | 82 | 48.2 | 71 | 31 | 82 | 0.87 | 95 | 0 |
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| 1992 | 48 | 3 | 56.6 | 3 | 39.4 | 5 | 3.70 | 54 | 0 |
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| 1991 | 47.8 | 4 | 57.1 | 2 | 38.4 | 10 | 3.84 | 50 | 0 |
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| 1990 | 40.3 | 74 | 47.4 | 82 | 33.3 | 61 | 3.68 | 55 | 0 |
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| 1989 | 35.2 | 91 | 42.5 | 93 | 27.6 | 94 | 2.28 | 77 | 1 |
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| 1988 | 42.9 | 31 | 52.5 | 24 | 33.3 | 61 | 1.07 | 94 | 1 |
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| 1987 | 44.5 | 18 | 52.6 | 22 | 36.4 | 19 | 4.49 | 34 | 0 |
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| 1986 | 43.2 | 28 | 50.1 | 49 | 36.3 | 21 | 6.25 | 14 | 0 |
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| 1985 | 39.1 | 83 | 48.1 | 72 | 30.1 | 89 | 2.64 | 72 | 0 |
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| 1984 | 43.7 | 23 | 52.6 | 22 | 34.7 | 38 | 4.76 | 30 | 1 |
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| 1983 | 46 | 12 | 52.5 | 24 | 39.5 | 4 | 10.11 | 3 | 1 |
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| 1982 | 41.8 | 51 | 49.4 | 60 | 34.1 | 46 | 7.21 | 9 | 0 |
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| 1981 | 42.9 | 31 | 51.1 | 37 | 34.6 | 39 | 4.33 | 37 | 0 |
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| 1980 | 42.4 | 41 | 50 | 51 | 34.9 | 34 | 5.11 | 25 | 0 |
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| 1979 | 41.8 | 51 | 47.9 | 75 | 35.8 | 26 | 7.29 | 8 | 0 |
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| 1978 | 46.2 | 9 | 53 | 18 | 39.3 | 6 | 4.73 | 31 | 0 |
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| 1977 | 44.3 | 19 | 54.7 | 10 | 33.8 | 53 | 2.28 | 77 | 0 |
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| 1976 | 41.4 | 58 | 49.4 | 60 | 33.3 | 61 | 5.70 | 18 | 1 |
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| 1975 | 41.1 | 66 | 47.5 | 80 | 34.6 | 39 | 5.39 | 21 | 0 |
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| 1974 | 41.9 | 50 | 47.6 | 79 | 36.3 | 21 | 4.45 | 35 | 0 |
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| 1973 | 44.9 | 15 | 53.5 | 16 | 36.1 | 23 | 2.31 | 76 | 1 |
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| 1972 | 42.7 | 34 | 49.8 | 55 | 35.6 | 28 | 4.18 | 40 | 0 |
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| 1971 | 42.5 | 39 | 50.1 | 49 | 34.9 | 34 | 3.41 | 60 | 0 |
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| 1970 | 46.5 | 8 | 56 | 4 | 37 | 15 | 4.11 | 42 | 0 |
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| 1969 | 40.7 | 69 | 47.5 | 80 | 33.9 | 50 | 2.94 | 69 | 0 |
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| 1968 | 48.4 | 2 | 57.6 | 1 | 39.2 | 7 | 6.90 | 11 | 0 |
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| 1967 | 43.2 | 28 | 52.9 | 19 | 33.5 | 57 | 1.40 | 92 | 0 |
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| 1966 | 41.4 | 58 | 50.2 | 47 | 32.5 | 70 | 1.73 | 87 | 0 |
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| 1965 | 42.7 | 34 | 50.3 | 46 | 35.2 | 29 | 1.89 | 84 | 0 |
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| 1964 | 41.6 | 55 | 52.4 | 26 | 30.9 | 84 | 0.38 | 97 | 0 |
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| 1963 | 47.2 | 6 | 56 | 4 | 38.4 | 10 | 3.89 | 49 | 0 |
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| 1962 | 42 | 48 | 49.7 | 56 | 34.4 | 44 | 3.33 | 62 | 2 |
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| 1961 | | | | | 40.8 | 2 | 9.25 | 7 | 5 |
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| 1960 | 40.9 | 67 | 48.3 | 68 | 33.6 | 56 | 4.81 | 29 | 2 |
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| 1959 | 42 | 48 | 48.3 | 68 | 35.8 | 26 | 4.14 | 41 | 0 |
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| 1958 | 48.8 | 1 | 55.2 | 8 | 42.5 | 1 | 7.09 | 10 | 1 |
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| 1957 | 42.3 | 42 | 50.2 | 47 | 34.3 | 45 | 4.01 | 46 | 0 |
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| 1956 | 35.7 | 90 | 41.6 | 94 | 29.8 | 90 | 3.03 | 67 | 0 |
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| 1955 | 40.1 | 77 | 47.8 | 77 | 32.4 | 72 | 2.56 | 73 | 0 |
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| 1954 | 43.1 | 30 | 52.1 | 28 | 34 | 48 | 5.23 | 24 | 1 |
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| 1953 | 43.6 | 25 | 52.7 | 21 | 34.5 | 42 | 3.49 | 57 | 0 |
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| 1952 | 40.8 | 68 | 47.7 | 78 | 34 | 48 | 4.06 | 43 | 1 |
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| 1951 | 42.6 | 37 | 50.4 | 44 | 34.8 | 37 | 3.71 | 53 | 0 |
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| 1950 | 39.7 | 81 | 47.3 | 84 | 32.1 | 76 | 5.99 | 15 | 0 |
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| 1949 | 38.7 | 86 | 46.6 | 88 | 30.8 | 85 | 10.03 | 5 | 0 |
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| 1948 | 40.3 | 74 | 48.1 | 72 | 32.4 | 72 | 5.37 | 22 | 0 |
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| 1947 | 44.8 | 17 | 54.6 | 11 | 35.1 | 31 | 3.33 | 62 | 0 |
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| 1946 | 41.2 | 64 | 49.1 | 62 | 33.3 | 61 | 5.32 | 23 | 0 |
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| 1945 | 43.7 | 23 | 51.3 | 34 | 36.1 | 23 | 5.64 | 19 | 0 |
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| 1944 | | | 49.9 | 53 | 32.6 | 68 | 2.98 | 68 | 4 |
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| 1943 | 42.7 | 34 | 53.6 | 15 | 31.7 | 79 | 3.59 | 56 | 2 |
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| 1942 | 41.5 | 56 | 48.9 | 64 | 33.9 | 50 | 3.37 | 61 | 1 |
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| 1941 | 44.9 | 15 | 54.6 | 11 | 35.2 | 29 | 1.68 | 88 | 0 |
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| 1940 | 45.5 | 13 | 52.1 | 28 | 39 | 9 | 10.21 | 2 | 0 |
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| 1939 | | | 45.7 | 89 | | | 4.73 | 31 | 5 |
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| 1938 | 41.3 | 61 | 48.8 | 65 | 33.8 | 53 | 5.79 | 17 | 0 |
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| 1937 | 40.5 | 72 | 47.4 | 82 | 33.5 | 57 | 6.64 | 12 | 1 |
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| 1936 | 33.7 | 92 | 40.2 | 95 | 27.1 | 95 | 5.86 | 16 | 0 |
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| 1935 | 42.6 | 37 | 51.8 | 30 | 33.4 | 59 | 3.19 | 64 | 1 |
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| 1934 | | | 55.9 | 7 | | | 1.77 | 86 | 3 |
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| 1933 | | | | | 30.3 | 88 | 2.89 | 71 | 11 |
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| 1932 | 40.1 | 77 | 46.7 | 87 | 33.4 | 59 | 2.32 | 75 | 0 |
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| 1931 | 41.3 | 61 | 52.3 | 27 | 30.8 | 85 | 1.94 | 83 | 2 |
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| 1930 | 44 | 21 | 51.1 | 37 | 36.6 | 17 | 4.33 | 37 | 1 |
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