Every December in McCook, NE from 1894 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 | 37.8 | 2 | 52.9 | 2 | 22.7 | 6 | trace | 94 | 0 |
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| 2024 | 36.6 | 6 | 50.9 | 7 | 22.3 | 8 | 0.00 | 101 | 0 |
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| 2023 | 36.9 | 3 | 49.4 | 11 | 24.5 | 1 | 0.36 | 48 | 0 |
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| 2022 | 27 | 67 | 40.9 | 56 | 13.1 | 74 | 1.07 | 15 | 0 |
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| 2021 | 35 | 14 | 51.8 | 4 | 18.3 | 45 | 0.13 | 76 | 0 |
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| 2020 | 33.3 | 23 | 47.3 | 19 | 19.3 | 37 | 0.32 | 49 | 1 |
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| 2019 | 33.6 | 20 | 46 | 24 | 21.2 | 18 | 0.37 | 47 | 0 |
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| 2018 | 28.3 | 58 | 39.1 | 69 | 17.5 | 52 | 1.92 | 4 | 0 |
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| 2017 | 28.5 | 56 | 41.7 | 50 | 15.3 | 64 | trace | 94 | 0 |
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| 2016 | 26.8 | 69 | 40.7 | 59 | 12.8 | 77 | 0.43 | 42 | 0 |
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| 2015 | 33 | 25 | 44.4 | 38 | 21.6 | 13 | 0.16 | 67 | 0 |
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| 2014 | 30 | 49 | 41.3 | 53 | 18.8 | 40 | 1.29 | 9 | 0 |
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| 2013 | 26.2 | 71 | 40.7 | 59 | 12.1 | 79 | 0.22 | 59 | 2 |
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| 2012 | 27.3 | 66 | 41.1 | 55 | 13.5 | 70 | 1.28 | 10 | 0 |
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| 2011 | 28.2 | 61 | 40.9 | 56 | 15.4 | 63 | 0.53 | 36 | 0 |
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| 2010 | 28.5 | 56 | 41.5 | 51 | 15.5 | 62 | 0.15 | 69 | 0 |
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| 2009 | 21.7 | 86 | 32.1 | 87 | 11.4 | 82 | 0.18 | 63 | 0 |
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| 2008 | 26.7 | 70 | 40.3 | 64 | 13.1 | 74 | 0.10 | 79 | 0 |
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| 2007 | 23.2 | 81 | 33.9 | 86 | 12.4 | 78 | 0.70 | 24 | 0 |
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| 2006 | 31.5 | 38 | 44.2 | 39 | 18.8 | 40 | 2.59 | 2 | 0 |
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| 2005 | 28.1 | 62 | 39.3 | 65 | 16.8 | 56 | 0.14 | 72 | 0 |
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| 2004 | 33.9 | 19 | 47.4 | 18 | 20.4 | 23 | 0.01 | 93 | 0 |
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| 2003 | 32.4 | 31 | 45.5 | 30 | 19.4 | 33 | 0.02 | 90 | 0 |
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| 2002 | 33.4 | 22 | 48.6 | 14 | 18.2 | 47 | trace | 94 | 0 |
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| 2001 | 35.4 | 10 | 49.3 | 12 | 21.5 | 14 | 0.14 | 72 | 0 |
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| 2000 | 25.2 | 76 | 35.6 | 83 | 14.8 | 67 | 0.05 | 86 | 0 |
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| 1999 | 34.2 | 16 | 49 | 13 | 19.4 | 33 | 0.24 | 57 | 1 |
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| 1998 | 30.1 | 48 | 44.5 | 37 | 15.7 | 61 | trace | 94 | 0 |
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| 1997 | 31.5 | 38 | 40.4 | 62 | 22.5 | 7 | | | 0 |
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| 1996 | | | | | | | 0.02 | 90 | 5 |
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| 1995 | 30.9 | 44 | 43.6 | 43 | 18.2 | 47 | 0.02 | 90 | 0 |
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| 1994 | 32.7 | 30 | 44.6 | 35 | 20.8 | 21 | 1.73 | 5 | 1 |
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| 1993 | 32.8 | 29 | 44.2 | 39 | 21.9 | 11 | 0.14 | 72 | 1 |
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| 1992 | 24.1 | 80 | 35.1 | 84 | 13.2 | 71 | 0.49 | 37 | 0 |
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| 1991 | 34.2 | 16 | 44.7 | 34 | 23.7 | 2 | 0.98 | 18 | 0 |
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| 1990 | 25.2 | 76 | 36.7 | 80 | 12.9 | 76 | 0.08 | 85 | 1 |
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| 1989 | 22.4 | 83 | 37.1 | 78 | 8.8 | 86 | 0.80 | 21 | 2 |
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| 1966 | 29.5 | 52 | 42.2 | 48 | 16.7 | 59 | 0.59 | 30 | 0 |
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| 1965 | 35.3 | 11 | 48.4 | 16 | 22.2 | 9 | 0.59 | 30 | 0 |
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| 1964 | 31.9 | 34 | 48.4 | 16 | 15.3 | 64 | 0.10 | 79 | 0 |
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| 1963 | 28.1 | 62 | 41.5 | 51 | 14.8 | 67 | 0.32 | 49 | 0 |
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| 1962 | 35.3 | 11 | 50.2 | 9 | 20.4 | 23 | 0.69 | 25 | 0 |
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| 1961 | 25.6 | 72 | 39.2 | 67 | 12 | 80 | 0.89 | 19 | 0 |
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| 1960 | 32.1 | 32 | 45.9 | 25 | 18.3 | 45 | 1.06 | 16 | 0 |
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| 1959 | 36.7 | 5 | 51.9 | 3 | 21.5 | 14 | 0.54 | 35 | 0 |
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| 1958 | 31.8 | 35 | 44.6 | 35 | 19.4 | 33 | 0.56 | 32 | 1 |
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| 1957 | 39.8 | 1 | 56.2 | 1 | 23.5 | 3 | 0.19 | 62 | 0 |
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| 1956 | 36.9 | 3 | 51.7 | 5 | 22.1 | 10 | 0.56 | 32 | 0 |
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| 1955 | 25.5 | 74 | 37.9 | 74 | 13.2 | 71 | 0.48 | 39 | 0 |
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| 1954 | | | | | 20.2 | 28 | 0.05 | 86 | 9 |
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| 1953 | 32.1 | 32 | 43.6 | 43 | 20.7 | 22 | 0.62 | 27 | 0 |
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| 1952 | 28.3 | 58 | 38.4 | 72 | 18.1 | 49 | 0.11 | 78 | 0 |
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| 1951 | 25.6 | 72 | 36.9 | 79 | 14.2 | 69 | 0.03 | 89 | 0 |
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| 1950 | 32.9 | 27 | 46.1 | 23 | 19.7 | 30 | 0.13 | 76 | 0 |
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| 1949 | 31.1 | 43 | 45.2 | 31 | 16.9 | 55 | 0.10 | 79 | 0 |
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| 1948 | 29 | 54 | 38.9 | 70 | 19.1 | 38 | 0.25 | 54 | 0 |
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| 1947 | 29.8 | 50 | 39.3 | 65 | 19.9 | 29 | 1.10 | 13 | 2 |
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| 1946 | 34.1 | 18 | 46.6 | 22 | 21.5 | 14 | 0.05 | 86 | 0 |
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| 1945 | 24.4 | 79 | 36.4 | 81 | 12 | 80 | 0.71 | 23 | 2 |
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| 1944 | 27.9 | 64 | 37.9 | 74 | 17.9 | 50 | 0.44 | 41 | 0 |
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| 1943 | 31.4 | 40 | 43.8 | 41 | 18.5 | 42 | 0.23 | 58 | 1 |
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| 1942 | 31.3 | 41 | 42.6 | 45 | 19.5 | 32 | 0.47 | 40 | 1 |
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| 1941 | 31.8 | 35 | 43.7 | 42 | 19.7 | 30 | 2.24 | 3 | 1 |
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| 1940 | | | 41.8 | 49 | 19.4 | 33 | 1.20 | 11 | 4 |
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| 1939 | 36.4 | 7 | 49.9 | 10 | 23 | 4 | 0.88 | 20 | 1 |
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| 1938 | 32.9 | 27 | 47.3 | 19 | 18.5 | 42 | 0.15 | 69 | 0 |
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| 1937 | 29.6 | 51 | 40.8 | 58 | 17.5 | 52 | 0.31 | 51 | 3 |
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| 1936 | 35.1 | 13 | 48.6 | 14 | 21 | 19 | | | 2 |
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| 1935 | 34.9 | 15 | 47.3 | 19 | 21.8 | 12 | 0.27 | 53 | 2 |
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| 1934 | 31.3 | 41 | 42.5 | 46 | 20.3 | 25 | 0.49 | 37 | 2 |
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| 1933 | 36.3 | 8 | 50.8 | 8 | 22.9 | 5 | 1.52 | 6 | 3 |
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| 1932 | 24.5 | 78 | 39.2 | 67 | 10.1 | 84 | 0.18 | 63 | 1 |
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| 1931 | 33.2 | 24 | 45.6 | 28 | 20.3 | 25 | 0.56 | 32 | 3 |
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| 1930 | 33.6 | 20 | 45.6 | 28 | 21.5 | 14 | 0.40 | 44 | 0 |
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| 1929 | 35.9 | 9 | 51.2 | 6 | 20.3 | 25 | 0.14 | 72 | 1 |
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| 1928 | 33 | 25 | 45 | 32 | 20.9 | 20 | 0.00 | 101 | 0 |
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| 1927 | 22 | 84 | 36.3 | 82 | 7.6 | 88 | 0.66 | 26 | 0 |
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| 1926 | 29.4 | 53 | 40.4 | 62 | 18.4 | 44 | 0.25 | 54 | 0 |
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| 1925 | 29 | 54 | 41.2 | 54 | 16.8 | 56 | 0.40 | 44 | 0 |
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| 1924 | | | 30.5 | 88 | 5.7 | 90 | | | 5 |
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| 1923 | 31.6 | 37 | 45.7 | 27 | 17.5 | 52 | 0.16 | 67 | 0 |
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| 1922 | 27.7 | 65 | 38.6 | 71 | 16.8 | 56 | 0.00 | 101 | 2 |
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| 1919 | 22 | 84 | 34.3 | 85 | 9.7 | 85 | 0.30 | 52 | 0 |
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| 1918 | | | | | | | 1.30 | 8 | 5 |
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| 1917 | 26.9 | 68 | 40.5 | 61 | 13.2 | 71 | 0.20 | 60 | 0 |
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| 1916 | 23.2 | 81 | 37.8 | 76 | 8.5 | 87 | 0.18 | 63 | 0 |
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| 1915 | 30.2 | 47 | 42.5 | 46 | 17.9 | 50 | 0.40 | 44 | 0 |
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| 1914 | 18.9 | 87 | 30.5 | 88 | 7.3 | 89 | 0.42 | 43 | 0 |
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| 1913 | 28.3 | 58 | 37.5 | 77 | 19.1 | 38 | 3.19 | 1 | 0 |
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| 1912 | 30.3 | 46 | 45 | 32 | 16.6 | 60 | trace | 94 | 2 |
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| 1911 | 25.3 | 75 | 38.3 | 73 | 11 | 83 | 1.10 | 13 | 2 |
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| 1910 | 30.4 | 45 | 45.9 | 25 | 14.9 | 66 | 0.17 | 66 | 0 |
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| 1909 | 15.2 | 88 | 27.7 | 90 | 3.3 | 91 | 1.13 | 12 | 1 |
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| 1907 | | | | | | | 1.50 | 7 | 31 |
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| 1906 | | | | | | | 0.80 | 21 | 31 |
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| 1904 | | | | | | | 0.10 | 79 | 31 |
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| 1903 | | | | | | | trace | 94 | 31 |
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| 1902 | | | | | | | 0.60 | 28 | 31 |
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| 1901 | | | | | | | 0.25 | 54 | 31 |
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| 1900 | | | | | | | 0.20 | 60 | 31 |
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| 1899 | | | | | | | 0.10 | 79 | 31 |
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| 1898 | | | | | | | 0.15 | 69 | 31 |
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| 1897 | | | | | | | 1.00 | 17 | 31 |
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| 1896 | | | | | | | trace | 94 | 31 |
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| 1895 | | | | | | | 0.10 | 79 | 31 |
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| 1894 | | | | | | | 0.60 | 28 | 31 |
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