Every April in Oswego, NY from 1926 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 | 50.1 | 5 | 60.3 | 4 | 40 | 10 | 4.78 | 15 | 0 |
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| 2025 | 47.7 | 15 | 57.2 | 12 | 38.3 | 27 | 2.78 | 60 | 0 |
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| 2024 | 49.4 | 8 | 57.4 | 11 | 41.3 | 4 | 3.20 | 45 | 0 |
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| 2023 | 50.9 | 2 | 60.4 | 3 | 41.4 | 3 | 3.79 | 26 | 0 |
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| 2022 | 47.7 | 15 | 56.4 | 18 | 38.9 | 17 | 3.64 | 27 | 0 |
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| 2021 | 49.1 | 10 | 56.9 | 13 | 41.2 | 5 | 2.31 | 76 | 0 |
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| 2020 | 44.3 | 58 | 50.4 | 71 | 37.6 | 40 | 2.45 | 71 | 2 |
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| 2019 | 45 | 50 | 53.1 | 51 | 36.9 | 53 | 3.37 | 39 | 0 |
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| 2018 | 39.4 | 95 | 46.3 | 94 | 32.5 | 96 | 3.37 | 39 | 0 |
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| 2017 | 50.3 | 4 | 58.2 | 6 | 42.3 | 2 | 5.34 | 10 | 0 |
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| 2016 | 41.8 | 80 | 49.2 | 80 | 34.4 | 81 | 2.23 | 77 | 0 |
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| 2015 | 45.2 | 47 | 53.8 | 43 | 36.6 | 58 | 3.13 | 47 | 0 |
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| 2014 | 45.9 | 38 | 55.3 | 25 | 36.6 | 58 | 4.08 | 21 | 0 |
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| 2013 | 46.6 | 29 | 55.8 | 23 | 37.3 | 45 | 3.47 | 35 | 0 |
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| 2012 | 45.8 | 40 | 53.5 | 46 | 38 | 35 | 2.14 | 80 | 0 |
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| 2011 | 47 | 21 | 54.9 | 31 | 39 | 16 | 6.66 | 1 | 0 |
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| 2010 | 51.7 | 1 | 60.8 | 1 | 42.5 | 1 | 1.33 | 98 | 0 |
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| 2009 | 46.4 | 34 | 55.3 | 25 | 37.5 | 41 | 3.41 | 36 | 0 |
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| 2008 | 50.9 | 2 | 60.7 | 2 | 41.2 | 5 | 3.06 | 49 | 1 |
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| 2007 | 42.2 | 78 | 48.7 | 83 | 35.8 | 67 | 4.90 | 13 | 0 |
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| 2006 | 46 | 36 | 54.7 | 36 | 37.3 | 45 | 2.41 | 72 | 0 |
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| 2005 | 45.3 | 46 | 53.7 | 44 | 36.9 | 53 | 5.64 | 5 | 0 |
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| 2004 | 43.5 | 63 | 50.2 | 73 | 36.7 | 57 | 3.54 | 30 | 0 |
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| 2003 | 41.5 | 82 | 50.1 | 74 | 32.9 | 94 | 3.52 | 32 | 0 |
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| 2002 | 47.1 | 20 | 54.7 | 36 | 39.4 | 12 | 5.37 | 9 | 1 |
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| 2001 | 47 | 21 | 56.2 | 20 | 37.8 | 38 | 0.91 | 100 | 0 |
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| 2000 | 44.1 | 60 | 50.8 | 63 | 37.4 | 42 | 4.26 | 19 | 0 |
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| 1999 | 45 | 50 | 53 | 53 | 37 | 51 | 1.39 | 97 | 0 |
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| 1998 | 46.7 | 27 | 55.2 | 27 | 38.2 | 31 | 1.62 | 93 | 0 |
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| 1997 | 43.5 | 63 | 51.9 | 58 | 34.8 | 79 | 1.75 | 90 | 1 |
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| 1996 | 42.6 | 76 | 50 | 76 | 35.4 | 75 | 5.28 | 11 | 1 |
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| 1995 | 41.4 | 83 | 49.1 | 81 | 33.6 | 86 | 2.00 | 86 | 1 |
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| 1994 | 47.7 | 15 | 57.6 | 10 | 37.8 | 38 | 3.92 | 24 | 0 |
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| 1993 | 45.5 | 43 | 54.1 | 41 | 37 | 51 | 5.68 | 3 | 1 |
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| 1992 | 43.2 | 67 | 50.3 | 72 | 36 | 64 | 4.41 | 18 | 0 |
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| 1991 | 49.5 | 7 | 57.9 | 8 | 41 | 8 | 3.54 | 30 | 0 |
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| 1990 | 48.1 | 12 | 56.7 | 15 | 39.4 | 12 | 5.22 | 12 | 0 |
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| 1989 | 42.4 | 77 | 50.6 | 67 | 34.2 | 83 | 1.85 | 88 | 0 |
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| 1988 | 44.8 | 53 | 52.7 | 54 | 36.9 | 53 | 2.86 | 56 | 0 |
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| 1987 | 50.1 | 5 | 59.1 | 5 | 41.1 | 7 | 3.06 | 49 | 0 |
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| 1986 | 47.8 | 14 | 56.7 | 15 | 38.8 | 19 | 3.36 | 41 | 0 |
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| 1985 | 46.7 | 27 | 56.1 | 21 | 37.4 | 42 | 1.76 | 89 | 0 |
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| 1984 | 45.5 | 43 | 52.7 | 54 | 38.1 | 32 | 3.49 | 34 | 1 |
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| 1983 | 43 | 72 | 50.5 | 68 | 35.6 | 71 | 5.64 | 5 | 1 |
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| 1982 | 43.5 | 63 | 53.4 | 47 | 33.6 | 86 | 1.69 | 92 | 0 |
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| 1981 | 46.8 | 26 | 56.3 | 19 | 37.3 | 45 | 2.79 | 58 | 0 |
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| 1980 | 45.2 | 47 | 53.1 | 51 | 37.3 | 45 | 5.45 | 8 | 0 |
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| 1979 | 43.2 | 67 | 50.8 | 63 | 35.5 | 72 | 3.91 | 25 | 0 |
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| 1978 | 40.5 | 88 | 48.3 | 86 | 32.7 | 95 | 2.06 | 82 | 0 |
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| 1977 | 46.5 | 32 | 56.6 | 17 | 36.4 | 62 | 2.91 | 54 | 0 |
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| 1976 | 46.6 | 29 | 54.6 | 38 | 38.5 | 22 | 4.81 | 14 | 0 |
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| 1975 | 39.1 | 97 | 46 | 96 | 32.1 | 97 | 1.43 | 96 | 0 |
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| 1974 | 48.2 | 11 | 58 | 7 | 38.4 | 24 | 2.60 | 64 | 0 |
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| 1973 | 46.6 | 29 | 54.9 | 31 | 38.4 | 24 | 5.74 | 2 | 0 |
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| 1972 | 39.4 | 95 | 47.5 | 90 | 31.2 | 99 | 3.08 | 48 | 0 |
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| 1971 | 40.5 | 88 | 48.9 | 82 | 32 | 98 | 1.89 | 87 | 0 |
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| 1970 | 45.7 | 41 | 55.1 | 29 | 36.4 | 62 | 2.36 | 74 | 0 |
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| 1969 | 45.9 | 38 | 56.1 | 21 | 35.7 | 68 | 5.67 | 4 | 0 |
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| 1968 | 46.5 | 32 | 54.9 | 31 | 38.1 | 32 | 2.56 | 67 | 0 |
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| 1967 | 44.6 | 57 | 52 | 57 | 37.2 | 49 | 2.04 | 84 | 1 |
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| 1966 | 41.8 | 80 | 48.2 | 87 | 35.4 | 75 | 2.12 | 81 | 0 |
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| 1965 | 38.8 | 98 | 44.4 | 99 | 33.2 | 93 | 3.22 | 43 | 0 |
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| 1964 | 44.3 | 58 | 51.9 | 58 | 36.8 | 56 | 3.15 | 46 | 0 |
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| 1963 | 43.1 | 69 | 50.5 | 68 | 35.7 | 68 | 4.53 | 16 | 0 |
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| 1962 | 44 | 61 | 49.7 | 77 | 38.3 | 27 | 4.04 | 22 | 0 |
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| 1961 | 40.8 | 86 | 46.1 | 95 | 35.5 | 72 | 4.50 | 17 | 0 |
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| 1960 | 45.4 | 45 | 53.4 | 47 | 37.9 | 36 | 2.21 | 78 | 1 |
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| 1959 | 44.9 | 52 | 53.2 | 49 | 36.5 | 60 | 2.97 | 51 | 0 |
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| 1958 | | | 54.4 | 40 | 38.3 | 27 | 3.50 | 33 | 5 |
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| 1957 | 47 | 21 | 54.8 | 35 | 38.4 | 24 | 2.06 | 82 | 2 |
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| 1956 | 39.5 | 94 | 46.5 | 92 | 33.4 | 91 | 2.32 | 75 | 2 |
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| 1955 | 47.3 | 18 | 54.9 | 31 | 39.3 | 15 | 3.40 | 38 | 2 |
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| 1954 | 45.6 | 42 | 55.4 | 24 | 35.9 | 65 | 5.64 | 5 | 1 |
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| 1953 | 43.8 | 62 | 49.6 | 78 | 38.1 | 32 | 2.68 | 62 | 0 |
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| 1952 | 47 | 21 | 54.5 | 39 | 39.5 | 11 | 1.56 | 94 | 0 |
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| 1951 | 44.8 | 53 | 50.9 | 62 | 38.6 | 21 | 3.98 | 23 | 0 |
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| 1950 | 40.5 | 88 | 47.5 | 90 | 33.5 | 90 | 1.73 | 91 | 0 |
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| 1949 | 44.8 | 53 | 51.3 | 60 | 38.3 | 27 | 3.41 | 36 | 0 |
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| 1948 | 47 | 21 | 55.1 | 29 | 38.8 | 19 | 2.79 | 58 | 0 |
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| 1947 | 43 | 72 | 50.8 | 63 | 35.2 | 77 | 2.94 | 53 | 0 |
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| 1946 | 43.1 | 69 | 50.7 | 66 | 35.5 | 72 | 1.10 | 99 | 0 |
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| 1945 | 49.2 | 9 | 57.8 | 9 | 40.7 | 9 | 2.58 | 66 | 0 |
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| 1944 | 39.7 | 93 | 45.4 | 98 | 33.9 | 85 | 3.63 | 28 | 0 |
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| 1943 | 37.3 | 99 | 43.9 | 101 | 30.8 | 100 | 3.55 | 29 | 0 |
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| 1942 | 47.3 | 18 | 55.2 | 27 | 39.4 | 12 | 2.76 | 61 | 0 |
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| 1941 | 47.9 | 13 | 56.9 | 13 | 38.9 | 17 | 0.66 | 101 | 0 |
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| 1940 | 39.8 | 92 | 46.4 | 93 | 33.3 | 92 | 2.88 | 55 | 0 |
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| 1939 | 40.6 | 87 | 47.6 | 89 | 33.6 | 86 | 2.66 | 63 | 0 |
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| 1938 | 46 | 36 | 54.1 | 41 | 37.9 | 36 | 2.60 | 64 | 0 |
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| 1937 | 43.3 | 66 | 50.1 | 74 | 36.5 | 60 | 2.37 | 73 | 0 |
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| 1936 | 41 | 85 | 47.7 | 88 | 34.3 | 82 | 2.81 | 57 | 0 |
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| 1935 | 42.7 | 75 | 49.4 | 79 | 35.9 | 65 | 2.16 | 79 | 0 |
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| 1934 | 42.8 | 74 | 51 | 61 | 34.5 | 80 | 2.48 | 68 | 0 |
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| 1933 | 46.1 | 35 | 53.7 | 44 | 38.5 | 22 | 3.23 | 42 | 0 |
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| 1932 | 40 | 91 | 45.9 | 97 | 34.2 | 83 | 2.46 | 70 | 0 |
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| 1931 | 45.2 | 47 | 53.2 | 49 | 37.1 | 50 | 2.47 | 69 | 0 |
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| 1930 | 41.9 | 79 | 48.7 | 83 | 35 | 78 | 2.02 | 85 | 0 |
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| 1929 | 44.8 | 53 | 52.2 | 56 | 37.4 | 42 | 4.11 | 20 | 0 |
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| 1928 | 41.1 | 84 | 48.6 | 85 | 33.6 | 86 | 2.95 | 52 | 0 |
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| 1927 | 43.1 | 69 | 50.5 | 68 | 35.7 | 68 | 1.49 | 95 | 0 |
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| 1926 | 37.3 | 99 | 44.4 | 99 | 30.1 | 101 | 3.21 | 44 | 0 |
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