Every April in Tri-Cities, WA from 1894 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 | 53.2 | 70 | 68.8 | 46 | 37.6 | 106 | 1.11 | 14 | 0 |
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| 2025 | 53.1 | 73 | 69.2 | 41 | 37 | 110 | 0.50 | 52 | 0 |
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| 2024 | 53.4 | 67 | 67.7 | 63 | 39.1 | 81 | 0.11 | 103 | 0 |
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| 2023 | 51.8 | 102 | 65.5 | 92 | 38.1 | 99 | 0.82 | 30 | 0 |
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| 2022 | 48.9 | 120 | 61.2 | 123 | 36.5 | 111 | 1.93 | 1 | 0 |
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| 2021 | 54 | 57 | 71.5 | 16 | 36.4 | 113 | trace | 117 | 0 |
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| 2020 | 53.8 | 62 | 71.1 | 19 | 36.5 | 111 | 0.19 | 91 | 0 |
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| 2019 | 57 | 12 | 69.4 | 38 | 44.5 | 6 | 0.85 | 28 | 0 |
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| 2018 | 53.6 | 64 | 66.7 | 73 | 40.4 | 53 | 1.35 | 4 | 0 |
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| 2017 | 52.4 | 88 | 65.3 | 95 | 39.5 | 76 | 1.19 | 10 | 0 |
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| 2016 | 58.5 | 1 | 74.5 | 4 | 42.5 | 18 | 0.28 | 70 | 0 |
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| 2015 | 52.1 | 95 | 67.9 | 59 | 36.4 | 113 | 0.20 | 87 | 0 |
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| 2014 | 53.9 | 60 | 68 | 58 | 39.8 | 71 | 0.35 | 65 | 0 |
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| 2013 | 52 | 97 | 66.4 | 79 | 37.6 | 106 | 0.55 | 46 | 0 |
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| 2012 | 54 | 57 | 67.9 | 59 | 40 | 66 | 0.90 | 24 | 0 |
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| 2011 | 48.2 | 122 | 61.1 | 124 | 35.2 | 119 | 0.53 | 48 | 0 |
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| 2010 | 53.1 | 73 | 66.7 | 73 | 39.5 | 76 | 0.51 | 50 | 0 |
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| 2009 | 51.3 | 107 | 66.4 | 79 | 36.2 | 115 | 0.64 | 42 | 0 |
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| 2008 | 49 | 119 | 63.2 | 116 | 34.8 | 120 | 0.25 | 78 | 0 |
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| 2007 | 52.5 | 84 | 66.5 | 76 | 38.4 | 92 | 0.28 | 70 | 0 |
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| 2006 | 52.5 | 84 | 66.4 | 79 | 38.6 | 89 | 1.28 | 9 | 0 |
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| 2005 | 54 | 57 | 67.8 | 61 | 40.1 | 63 | 0.50 | 52 | 0 |
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| 2004 | 54.2 | 52 | 70.6 | 28 | 37.9 | 102 | 0.25 | 78 | 0 |
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| 2003 | 53.5 | 66 | 66 | 87 | 41.1 | 40 | 1.02 | 17 | 0 |
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| 2002 | 52.3 | 91 | 66.9 | 72 | 37.7 | 104 | 0.26 | 76 | 0 |
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| 2001 | 51.3 | 107 | 64.1 | 108 | 38.4 | 92 | 1.06 | 16 | 0 |
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| 2000 | 54.7 | 45 | 70.5 | 29 | 38.9 | 85 | 0.20 | 87 | 0 |
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| 1999 | 49.6 | 116 | 66 | 87 | 33.1 | 123 | 0.18 | 92 | 0 |
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| 1998 | 51.1 | 111 | 67.3 | 65 | 34.8 | 120 | 0.20 | 87 | 0 |
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| 1997 | 52.3 | 91 | 64 | 110 | 40.5 | 51 | 0.77 | 34 | 0 |
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| 1996 | 55 | 39 | 66.5 | 76 | 43.4 | 12 | 0.90 | 24 | 0 |
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| 1995 | 52.2 | 93 | 64.4 | 104 | 40.4 | 53 | 1.30 | 7 | 1 |
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| 1994 | 57.4 | 8 | 69.3 | 40 | 45.5 | 1 | 0.28 | 70 | 0 |
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| 1993 | 53.4 | 67 | 63.8 | 113 | 43.1 | 15 | 1.58 | 3 | 0 |
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| 1992 | 56.5 | 17 | 67.8 | 61 | 44.9 | 4 | 1.34 | 5 | 1 |
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| 1991 | 54.2 | 52 | 66 | 87 | 42.6 | 17 | 0.24 | 81 | 1 |
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| 1990 | 58 | 4 | 70.7 | 25 | 45.1 | 3 | 0.75 | 35 | 1 |
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| 1989 | 56.3 | 23 | 68.2 | 54 | 44.4 | 7 | 0.62 | 44 | 0 |
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| 1988 | 55.2 | 37 | 67.1 | 69 | 43.3 | 13 | 0.41 | 58 | 0 |
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| 1987 | 58.3 | 2 | 71.2 | 17 | 45.3 | 2 | 0.20 | 87 | 0 |
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| 1986 | 53 | 76 | 66.1 | 86 | 39.8 | 71 | 0.05 | 110 | 0 |
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| 1985 | 56.3 | 23 | 70.4 | 30 | 41.9 | 29 | 0.11 | 103 | 1 |
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| 1984 | 53 | 76 | 65 | 99 | 40.9 | 43 | 0.81 | 32 | 1 |
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| 1983 | | | 68.7 | 47 | | | 0.31 | 68 | 4 |
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| 1982 | 48.9 | 120 | 64.6 | 101 | 33.6 | 122 | 0.83 | 29 | 2 |
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| 1981 | 54.3 | 51 | 67.1 | 69 | 41.4 | 36 | 0.12 | 102 | 0 |
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| 1980 | 56.4 | 22 | 70.9 | 22 | 42 | 24 | 0.29 | 69 | 0 |
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| 1978 | 53 | 76 | 64 | 110 | 42 | 24 | 0.73 | 36 | 0 |
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| 1977 | 56 | 28 | 71 | 21 | 40.9 | 43 | 0.05 | 110 | 0 |
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| 1976 | 52.1 | 95 | 66.5 | 76 | 37.8 | 103 | 0.73 | 36 | 0 |
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| 1975 | 49.4 | 117 | 63.1 | 117 | 35.6 | 118 | 0.52 | 49 | 0 |
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| 1974 | 54.2 | 52 | 66 | 87 | 42.3 | 20 | 1.19 | 10 | 0 |
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| 1973 | 54.8 | 42 | 69.6 | 36 | 39.9 | 69 | trace | 117 | 0 |
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| 1972 | 51.6 | 105 | 64.5 | 103 | 38.8 | 86 | 0.10 | 107 | 0 |
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| 1971 | 52.4 | 88 | 66.4 | 79 | 38.4 | 92 | 0.17 | 94 | 0 |
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| 1970 | 49.7 | 115 | 61.8 | 121 | 37.7 | 104 | 0.91 | 23 | 0 |
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| 1969 | 53.2 | 70 | 64.8 | 100 | 41.9 | 29 | 1.85 | 2 | 1 |
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| 1968 | 52.7 | 82 | 66.2 | 85 | 39.3 | 78 | trace | 117 | 0 |
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| 1967 | 50.1 | 114 | 61.7 | 122 | 38.6 | 89 | 0.34 | 67 | 0 |
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| 1966 | 55.6 | 31 | 69.2 | 41 | 42 | 24 | trace | 117 | 0 |
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| 1965 | 56.2 | 25 | 69.4 | 38 | 42.9 | 16 | 0.51 | 50 | 0 |
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| 1964 | 53.1 | 73 | 65.2 | 98 | 40.9 | 43 | 0.03 | 115 | 1 |
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| 1963 | 52.5 | 84 | 62.7 | 119 | 42.3 | 20 | 0.94 | 20 | 0 |
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| 1962 | 57.3 | 9 | 70.8 | 24 | 43.8 | 9 | 0.38 | 61 | 0 |
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| 1961 | 55.4 | 33 | 66.4 | 79 | 44.4 | 7 | 0.26 | 76 | 0 |
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| 1960 | 54.7 | 45 | 67.3 | 65 | 42.2 | 23 | 0.54 | 47 | 0 |
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| 1959 | 54.8 | 42 | 68.1 | 56 | 41.4 | 36 | 0.22 | 84 | 0 |
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| 1958 | 52.6 | 83 | 64.4 | 104 | 40.9 | 43 | 0.88 | 26 | 0 |
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| 1957 | 54.7 | 45 | 68.1 | 56 | 41.2 | 39 | 0.28 | 70 | 0 |
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| 1956 | 56.1 | 26 | 71.6 | 14 | 40.6 | 48 | trace | 117 | 0 |
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| 1955 | 49.4 | 117 | 60.8 | 125 | 38 | 101 | 0.66 | 41 | 0 |
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| 1954 | 51.8 | 102 | 65.3 | 95 | 38.2 | 97 | 0.14 | 101 | 0 |
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| 1953 | 52.8 | 81 | 65.4 | 93 | 40.2 | 59 | 0.92 | 21 | 0 |
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| 1952 | 56.5 | 17 | 72.6 | 10 | 40.4 | 53 | 0.16 | 97 | 0 |
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| 1951 | 53.2 | 70 | 70.4 | 30 | 36.1 | 117 | 0.28 | 70 | 0 |
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| 1950 | 51.2 | 110 | 64.2 | 106 | 38.2 | 97 | 0.49 | 54 | 0 |
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| 1949 | 57.2 | 10 | 72.7 | 9 | 41.8 | 32 | 0.05 | 110 | 1 |
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| 1948 | 51.1 | 111 | 62.1 | 120 | 40.1 | 63 | 1.30 | 7 | 0 |
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| 1947 | 56.1 | 26 | 70.2 | 34 | 42 | 24 | 0.64 | 42 | 0 |
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| 1946 | | | | | 40.2 | 59 | 0.07 | 108 | 6 |
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| 1945 | 52.2 | 93 | 65.4 | 93 | 39 | 84 | 0.45 | 56 | 0 |
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| 1944 | 54.9 | 41 | 69.1 | 44 | 40.6 | 48 | 0.87 | 27 | 0 |
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| 1943 | 57.1 | 11 | 70.9 | 22 | 43.3 | 13 | 1.00 | 18 | 0 |
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| 1942 | 56.5 | 17 | 71.1 | 19 | 41.9 | 29 | 0.17 | 94 | 0 |
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| 1941 | 56.7 | 15 | 71.6 | 14 | 41.8 | 32 | 0.25 | 78 | 0 |
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| 1940 | 55 | 39 | 68.5 | 52 | 41.5 | 35 | 0.41 | 58 | 0 |
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| 1939 | 56.7 | 15 | 72.9 | 8 | 40.5 | 51 | 0.15 | 98 | 0 |
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| 1938 | 53.6 | 64 | 67.4 | 64 | 39.7 | 74 | | | 0 |
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| 1937 | 52.5 | 84 | 63.3 | 115 | 41.6 | 34 | 1.10 | 15 | 0 |
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| 1936 | 55.9 | 30 | 67.2 | 68 | 44.7 | 5 | | | 0 |
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| 1935 | 51.3 | 107 | 64.2 | 106 | 38.5 | 91 | 0.59 | 45 | 0 |
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| 1934 | | | 76.9 | 1 | | | 0.18 | 92 | 5 |
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| 1933 | 53.3 | 69 | 68.5 | 52 | 38.1 | 99 | 0.15 | 98 | 0 |
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| 1932 | 55.4 | 33 | 68.2 | 54 | 42.5 | 18 | 0.42 | 57 | 0 |
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| 1931 | 53.9 | 60 | 67.3 | 65 | 40.4 | 53 | 0.36 | 64 | 0 |
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| 1930 | 57.9 | 5 | 72 | 12 | 43.8 | 9 | 0.22 | 84 | 0 |
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| 1929 | 51.7 | 104 | 64 | 110 | 39.3 | 78 | 0.37 | 63 | 0 |
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| 1928 | 51.9 | 100 | 64.1 | 108 | 39.6 | 75 | 0.97 | 19 | 0 |
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| 1927 | 52.4 | 88 | 66.3 | 84 | 38.4 | 92 | 0.04 | 113 | 2 |
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| 1926 | 57.5 | 7 | 74 | 5 | 41 | 41 | 0.17 | 94 | 3 |
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| 1925 | 56.5 | 17 | 70.7 | 25 | 42.3 | 20 | 0.79 | 33 | 0 |
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| 1923 | 54.6 | 49 | 68.6 | 49 | 40.6 | 48 | 0.67 | 40 | 0 |
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| 1922 | 50.6 | 113 | 62.8 | 118 | 38.3 | 96 | 0.15 | 98 | 0 |
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| 1921 | 53 | 76 | 66.7 | 73 | 39.3 | 78 | | | 0 |
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| 1920 | 51.6 | 105 | 65.9 | 91 | 37.4 | 108 | 1.17 | 12 | 1 |
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| 1919 | 55.5 | 32 | 71.2 | 17 | 39.8 | 71 | 0.72 | 39 | 0 |
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| 1918 | 55.2 | 37 | 71.7 | 13 | 38.7 | 87 | 0.27 | 75 | 0 |
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| 1917 | 52 | 97 | 63.7 | 114 | 40.1 | 63 | 0.92 | 21 | 1 |
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| 1916 | 56 | 28 | 69.9 | 35 | 42 | 24 | 1.17 | 12 | 0 |
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| 1915 | 57 | 12 | 70.3 | 32 | 43.7 | 11 | 1.31 | 6 | 0 |
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| 1914 | | | | | | | 0.82 | 30 | 8 |
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| 1913 | 55.3 | 36 | 70.3 | 32 | 41 | 41 | 0.40 | 60 | 2 |
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| 1912 | 54.7 | 45 | 68.6 | 49 | 40.8 | 47 | 0.73 | 36 | 1 |
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| 1911 | 54.1 | 56 | 72.1 | 11 | 36.2 | 115 | trace | 117 | 0 |
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| 1910 | 58.2 | 3 | 75 | 2 | 41.4 | 36 | 0.23 | 82 | 0 |
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| 1909 | 52.9 | 80 | 68.6 | 49 | 37.1 | 109 | 0.03 | 115 | 0 |
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| 1908 | 56.5 | 17 | 73.1 | 7 | 39.9 | 69 | 0.23 | 82 | 0 |
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| 1907 | 51.9 | 100 | 64.6 | 101 | 39.1 | 81 | 0.06 | 109 | 0 |
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| 1906 | 57.8 | 6 | 75 | 2 | 40.3 | 58 | trace | 117 | 2 |
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| 1905 | 55.4 | 33 | 70.7 | 25 | 40 | 66 | 0.04 | 113 | 0 |
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| 1904 | 56.9 | 14 | 73.5 | 6 | 40.2 | 59 | 0.35 | 65 | 0 |
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| 1899 | 53.7 | 63 | 67 | 71 | 40.4 | 53 | 0.38 | 61 | 0 |
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| 1898 | 54.8 | 42 | 69.5 | 37 | 40 | 66 | 0.21 | 86 | 0 |
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| 1897 | 54.2 | 52 | 69.2 | 41 | 39.1 | 81 | 0.11 | 103 | 0 |
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| 1896 | 52 | 97 | 65.3 | 95 | 38.7 | 87 | 0.49 | 54 | 0 |
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| 1895 | 54.5 | 50 | 68.7 | 47 | 40.2 | 59 | 0.11 | 103 | 0 |
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| 1894 | | | 69.1 | 44 | | | | | 30 |
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