Every November in Spencer, IA from 1896 to 2025, 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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| 2025 | 35.5 | 37 | 46.3 | 39 | 24.7 | 45 | 2.18 | 21 | 0 |
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| 2024 | 38.9 | 15 | 48.1 | 27 | 29.6 | 7 | 2.76 | 12 | 0 |
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| 2023 | 39.2 | 9 | 52.6 | 5 | 25.9 | 27 | 0.03 | 106 | 0 |
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| 2022 | 34.5 | 46 | 45.9 | 42 | 23.1 | 59 | 1.23 | 43 | 0 |
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| 2021 | 38.9 | 15 | 50.2 | 14 | 27 | 20 | 0.55 | 73 | 3 |
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| 2020 | 39.2 | 9 | 51.9 | 8 | 26.5 | 23 | 0.94 | 55 | 0 |
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| 2019 | 33 | 63 | 42.1 | 67 | 23.9 | 53 | 1.65 | 29 | 1 |
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| 2018 | 28.9 | 90 | 37.5 | 96 | 20.3 | 84 | 0.18 | 95 | 0 |
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| 2017 | 34.2 | 47 | 46.3 | 39 | 22.1 | 71 | 0.22 | 92 | 0 |
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| 2016 | 42.2 | 2 | 54 | 3 | 30.3 | 5 | 1.41 | 33 | 0 |
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| 2015 | | | | | | | 4.36 | 2 | 5 |
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| 2014 | 26.5 | 103 | 36.9 | 98 | 16.1 | 102 | 0.09 | 102 | 0 |
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| 2013 | 32.2 | 71 | 44.4 | 50 | 20 | 88 | 0.57 | 72 | 0 |
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| 2012 | 37.5 | 26 | 49.5 | 17 | 25.4 | 33 | 1.02 | 52 | 0 |
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| 2011 | 36.2 | 33 | 49.3 | 19 | 23.1 | 59 | 0.06 | 103 | 0 |
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| 2010 | 34.2 | 47 | 43.8 | 53 | 24.6 | 47 | 0.48 | 76 | 0 |
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| 2009 | 40.9 | 4 | 53 | 4 | 28.8 | 11 | 1.41 | 33 | 0 |
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| 2008 | 34 | 50 | 42.8 | 62 | 25.1 | 40 | 0.26 | 89 | 0 |
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| 2007 | 34.1 | 49 | 45.7 | 43 | 22.5 | 67 | 0.03 | 106 | 0 |
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| 2006 | 34.6 | 44 | 47.3 | 34 | 21.8 | 73 | 1.00 | 53 | 0 |
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| 2005 | 36.1 | 35 | 47.8 | 31 | 24.3 | 50 | 1.12 | 48 | 0 |
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| 2004 | 38.2 | 21 | 48.9 | 20 | 27.5 | 16 | 0.83 | 58 | 0 |
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| 2003 | 32.9 | 64 | 43.1 | 59 | 22.7 | 64 | 0.47 | 77 | 0 |
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| 2002 | 31.7 | 74 | 42.9 | 61 | 20.5 | 83 | 0.15 | 97 | 2 |
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| 2001 | 44.3 | 1 | 57.2 | 1 | 31.4 | 3 | 1.30 | 39 | 0 |
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| 2000 | 26.7 | 102 | 34.8 | 104 | 18.7 | 93 | 2.19 | 20 | 0 |
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| 1999 | 40.6 | 5 | 55.2 | 2 | 25.9 | 27 | 0.37 | 81 | 0 |
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| 1998 | 37.5 | 26 | 47.1 | 35 | 27.9 | 14 | 0.60 | 71 | 0 |
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| 1997 | 28.5 | 93 | 35.5 | 103 | 21.6 | 76 | 0.87 | 56 | 0 |
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| 1996 | 25.8 | 105 | 33.6 | 106 | 18.1 | 96 | 3.17 | 7 | 1 |
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| 1995 | 28.8 | 91 | 37.9 | 95 | 19.6 | 91 | 0.41 | 79 | 0 |
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| 1994 | 36.6 | 31 | 46.1 | 41 | 27.1 | 19 | 1.15 | 46 | 0 |
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| 1993 | 30.7 | 81 | 39.8 | 82 | 21.6 | 76 | 0.42 | 78 | 0 |
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| 1992 | 30.6 | 82 | 36 | 101 | 25.3 | 35 | 1.20 | 45 | 0 |
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| 1991 | 24.6 | 107 | 31.8 | 107 | 17.5 | 97 | 3.15 | 8 | 0 |
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| 1990 | 37.3 | 28 | 48.2 | 24 | 26.4 | 24 | 0.29 | 84 | 0 |
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| 1989 | 28.1 | 96 | 40.3 | 78 | 15.8 | 104 | 0.16 | 96 | 0 |
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| 1988 | 33.9 | 52 | 43.2 | 56 | 24.6 | 47 | 2.24 | 19 | 0 |
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| 1987 | 38.2 | 21 | 47.9 | 30 | 28.5 | 12 | 0.74 | 61 | 0 |
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| 1986 | 28.6 | 92 | 38.6 | 91 | 18.6 | 95 | 1.06 | 50 | 0 |
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| 1985 | 22.4 | 108 | 30.2 | 108 | 14.6 | 108 | 1.33 | 37 | 0 |
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| 1984 | 35.1 | 40 | 44.7 | 49 | 25.4 | 33 | 1.37 | 36 | 0 |
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| 1983 | 33.9 | 52 | 39.7 | 83 | 28.1 | 13 | 1.84 | 25 | 0 |
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| 1982 | 31.4 | 78 | 40 | 81 | 22.8 | 63 | 2.73 | 15 | 0 |
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| 1979 | 32 | 72 | 40.2 | 80 | 23.8 | 54 | 1.48 | 30 | 0 |
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| 1978 | 30.5 | 83 | 40.6 | 76 | 20.3 | 84 | 1.08 | 49 | 0 |
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| 1977 | 31.5 | 77 | 40.7 | 74 | 22.4 | 69 | 3.11 | 10 | 0 |
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| 1976 | 27.5 | 99 | 39.1 | 88 | 15.9 | 103 | 0.13 | 98 | 0 |
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| 1975 | 34.8 | 41 | 44.8 | 47 | 24.8 | 43 | 2.75 | 13 | 0 |
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| 1974 | 34.6 | 44 | 43.7 | 54 | 25.6 | 31 | 0.67 | 66 | 1 |
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| 1973 | 34.7 | 43 | 43.2 | 56 | 26.1 | 26 | 3.39 | 5 | 0 |
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| 1972 | 32.7 | 67 | 38.7 | 89 | 26.7 | 22 | 1.30 | 39 | 0 |
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| 1970 | 33.3 | 59 | 41.6 | 70 | 24.9 | 42 | 2.04 | 23 | 0 |
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| 1969 | 34 | 50 | 44.8 | 47 | 23.2 | 58 | 0.24 | 90 | 0 |
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| 1968 | 33.6 | 57 | 42.4 | 65 | 24.8 | 43 | 0.54 | 74 | 0 |
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| 1966 | 32 | 72 | 43.2 | 56 | 20.7 | 82 | 0.10 | 101 | 0 |
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| 1965 | 33.8 | 54 | 45 | 46 | 22.7 | 64 | 0.68 | 64 | 0 |
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| 1964 | 35.4 | 38 | 45.2 | 45 | 25.6 | 31 | 0.27 | 87 | 0 |
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| 1963 | 39.3 | 8 | 51.4 | 10 | 27.2 | 18 | 0.04 | 104 | 0 |
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| 1962 | 38.7 | 18 | 48.2 | 24 | 29 | 9 | 0.39 | 80 | 1 |
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| 1961 | 32.6 | 69 | 42.8 | 62 | 22.5 | 67 | 0.77 | 59 | 0 |
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| 1960 | 36.4 | 32 | 48.1 | 27 | 24.6 | 47 | 1.03 | 51 | 0 |
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| 1959 | 24.7 | 106 | 34.6 | 105 | 14.7 | 107 | 1.77 | 26 | 0 |
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| 1958 | 34.8 | 41 | 48.6 | 21 | 21 | 80 | 0.63 | 70 | 0 |
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| 1957 | 32.7 | 67 | 40.3 | 78 | 25 | 41 | 2.61 | 16 | 0 |
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| 1956 | 32.8 | 65 | 42.6 | 64 | 22.9 | 61 | 2.74 | 14 | 0 |
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| 1955 | 26 | 104 | 36.6 | 100 | 15.4 | 106 | 0.27 | 87 | 0 |
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| 1954 | 38.8 | 17 | 50.6 | 13 | 27 | 20 | 0.19 | 94 | 0 |
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| 1953 | 37.7 | 25 | 49.6 | 16 | 25.7 | 29 | 1.46 | 31 | 0 |
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| 1952 | 33.1 | 61 | 46.7 | 37 | 19.7 | 90 | 0.52 | 75 | 1 |
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| 1951 | 27.2 | 101 | 38.2 | 94 | 16.2 | 101 | 0.33 | 82 | 0 |
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| 1950 | 28.5 | 93 | 41.3 | 73 | 15.7 | 105 | 0.24 | 90 | 0 |
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| 1949 | 38.3 | 20 | 51.3 | 12 | 25.3 | 35 | 0.01 | 109 | 0 |
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| 1948 | 33.3 | 59 | 41.8 | 69 | 24.7 | 45 | 1.74 | 27 | 0 |
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| 1947 | 27.3 | 100 | 35.9 | 102 | 18.7 | 93 | 3.12 | 9 | 0 |
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| 1946 | 32.3 | 70 | 43.3 | 55 | 21.2 | 79 | | | 0 |
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| 1945 | 31.7 | 74 | 41.4 | 71 | 21.8 | 73 | 0.32 | 83 | 2 |
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| 1944 | 39.1 | 12 | 47 | 36 | 31.8 | 2 | 1.00 | 53 | 1 |
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| 1943 | 31.6 | 76 | 39.7 | 83 | 23.4 | 56 | 1.66 | 28 | 0 |
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| 1942 | 36.7 | 30 | 48.2 | 24 | 25.3 | 35 | 0.87 | 56 | 0 |
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| 1941 | 36.9 | 29 | 46.4 | 38 | 27.4 | 17 | 3.18 | 6 | 1 |
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| 1940 | 28.3 | 95 | 36.7 | 99 | 19.8 | 89 | 2.02 | 24 | 0 |
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| 1939 | 38.5 | 19 | 51.7 | 9 | 25.3 | 35 | 0.03 | 106 | 0 |
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| 1938 | 33.8 | 54 | 44.1 | 52 | 23.4 | 56 | 1.28 | 41 | 0 |
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| 1937 | 31.2 | 79 | 40.7 | 74 | 21.7 | 75 | 0.29 | 84 | 0 |
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| 1936 | 32.8 | 65 | 43 | 60 | 22.6 | 66 | 0.64 | 68 | 0 |
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| 1935 | 30.2 | 84 | 38.3 | 93 | 22 | 72 | 0.67 | 66 | 0 |
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| 1934 | 39 | 14 | 48.6 | 21 | 29.5 | 8 | 2.43 | 18 | 0 |
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| 1933 | 35.4 | 38 | 47.8 | 31 | 22.9 | 61 | 0.68 | 64 | 2 |
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| 1932 | 30.9 | 80 | 40.5 | 77 | 21.4 | 78 | 1.33 | 37 | 0 |
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| 1931 | 39.1 | 12 | 48.1 | 27 | 29.7 | 6 | 3.69 | 4 | 1 |
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| 1930 | 39.5 | 6 | 50 | 15 | 29 | 9 | 2.50 | 17 | 0 |
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| 1929 | 29.5 | 86 | 38.5 | 92 | 20.3 | 84 | 1.41 | 33 | 1 |
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| 1928 | 35.9 | 36 | 44.3 | 51 | 27.6 | 15 | 1.23 | 43 | 1 |
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| 1927 | 33.1 | 61 | 42.2 | 66 | 24 | 51 | 0.64 | 68 | 0 |
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| 1926 | 29.1 | 88 | 37.4 | 97 | 20.8 | 81 | 1.44 | 32 | 1 |
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| 1925 | 33.8 | 54 | 45.5 | 44 | 22.2 | 70 | 0.74 | 61 | 0 |
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| 1924 | 36.2 | 33 | 48.4 | 23 | 24 | 51 | 0.29 | 84 | 0 |
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| 1923 | 37.9 | 24 | 49.4 | 18 | 26.3 | 25 | 0.12 | 99 | 0 |
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| 1922 | 39.4 | 7 | 47.4 | 33 | 31.4 | 3 | 4.15 | 3 | 0 |
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| 1921 | 29.5 | 86 | 39.4 | 87 | 19.6 | 91 | 0.73 | 63 | 0 |
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| 1920 | 33.4 | 58 | 41.4 | 71 | 25.3 | 35 | 2.18 | 21 | 0 |
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| 1919 | 29.9 | 85 | 39.5 | 86 | 20.2 | 87 | 2.90 | 11 | 0 |
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| 1914 | 39.2 | 9 | 52.3 | 6 | 25.7 | 29 | 0.04 | 104 | 2 |
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| 1913 | 41.8 | 3 | 51.4 | 10 | 32.2 | 1 | 0.77 | 59 | 0 |
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| 1912 | 38 | 23 | 52.1 | 7 | 23.8 | 54 | 1.15 | 46 | 0 |
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| 1911 | 27.6 | 98 | 38.7 | 89 | 16.6 | 99 | 0.20 | 93 | 0 |
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| 1898 | 28.1 | 96 | 39.6 | 85 | 16.6 | 99 | 1.24 | 42 | 1 |
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| 1897 | 29.1 | 88 | 41.9 | 68 | 17.1 | 98 | 0.12 | 99 | 2 |
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| 1896 | 20.9 | 109 | 29.8 | 109 | 11.9 | 109 | 4.51 | 1 | 0 |
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