Every September in Mobridge, SD from 1911 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 | 65 | 20 | 75.5 | 46 | 54.5 | 2 | 3.00 | 14 | 0 |
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| 2025 | 65.3 | 18 | 77.4 | 32 | 53.3 | 5 | 6.48 | 1 | 0 |
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| 2024 | 70.8 | 1 | 86.7 | 1 | 54.8 | 1 | 0.01 | 108 | 0 |
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| 2023 | 65.9 | 12 | 79.1 | 18 | 52.7 | 8 | 2.80 | 17 | 0 |
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| 2022 | 67 | 4 | 81.9 | 7 | 52.2 | 11 | 1.16 | 52 | 0 |
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| 2021 | 65.4 | 17 | 79.1 | 18 | 51.7 | 16 | 1.21 | 50 | 0 |
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| 2020 | 62.2 | 44 | 76 | 40 | 48.3 | 54 | 1.01 | 57 | 0 |
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| 2019 | 63.7 | 28 | 74.9 | 54 | 52.5 | 10 | 3.63 | 7 | 0 |
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| 2018 | 62.3 | 41 | 72.9 | 72 | 51.6 | 17 | 3.33 | 10 | 0 |
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| 2017 | 62.8 | 39 | 75.4 | 47 | 50.1 | 34 | 1.94 | 28 | 0 |
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| 2016 | 63.7 | 28 | 75.8 | 43 | 51.6 | 17 | 0.60 | 76 | 0 |
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| 2015 | 67.4 | 3 | 81.6 | 10 | 53.3 | 5 | 0.74 | 68 | 0 |
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| 2014 | 61.7 | 50 | 74.5 | 58 | 48.8 | 44 | 0.71 | 69 | 0 |
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| 2013 | 66.2 | 8 | 79.1 | 18 | 53.3 | 5 | 3.37 | 9 | 0 |
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| 2012 | 62.3 | 41 | 79.2 | 17 | 45.4 | 81 | 0.05 | 107 | 0 |
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| 2011 | 59.7 | 75 | 75 | 52 | 44.4 | 89 | 0.53 | 81 | 1 |
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| 2010 | 58.4 | 85 | 70.6 | 90 | 46.3 | 76 | 1.84 | 31 | 0 |
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| 2009 | 64.5 | 22 | 77 | 35 | 52 | 13 | 0.88 | 62 | 0 |
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| 2008 | 60.6 | 61 | 74.4 | 59 | 46.7 | 71 | 2.10 | 25 | 0 |
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| 2007 | 61 | 56 | 73.9 | 64 | 48.1 | 57 | 1.80 | 32 | 0 |
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| 2006 | 58.5 | 84 | 69.8 | 94 | 47.2 | 65 | 2.77 | 18 | 0 |
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| 2005 | 66.2 | 8 | 81.6 | 10 | 50.9 | 25 | 0.51 | 83 | 0 |
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| 2004 | 63 | 37 | 75.6 | 44 | 50.3 | 31 | 3.26 | 11 | 0 |
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| 2003 | 61.5 | 52 | 76.1 | 38 | 46.9 | 70 | 1.08 | 55 | 0 |
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| 2002 | 64.1 | 27 | 77.8 | 26 | 50.3 | 31 | 0.63 | 74 | 0 |
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| 2001 | 63.3 | 35 | 75.6 | 44 | 50.9 | 25 | 1.53 | 37 | 0 |
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| 2000 | 62.3 | 41 | 77.8 | 26 | 46.7 | 71 | 0.46 | 85 | 0 |
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| 1999 | 56 | 102 | 67 | 106 | 45 | 85 | 2.84 | 16 | 0 |
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| 1998 | 66.7 | 7 | 81.2 | 13 | 52.1 | 12 | 0.23 | 99 | 0 |
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| 1997 | 64.2 | 26 | 77.6 | 31 | 50.8 | 29 | 1.13 | 53 | 0 |
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| 1996 | 60.2 | 69 | 70.6 | 90 | 49.8 | 36 | 4.50 | 3 | 1 |
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| 1995 | 60.8 | 58 | 73 | 71 | 48.5 | 50 | 1.01 | 57 | 0 |
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| 1994 | 63.2 | 36 | 76.1 | 38 | 50.3 | 31 | 0.30 | 93 | 0 |
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| 1993 | 56.3 | 99 | 68.3 | 101 | 44.3 | 90 | 0.87 | 63 | 0 |
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| 1992 | 60.3 | 68 | 73.6 | 67 | 47 | 68 | 2.07 | 26 | 0 |
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| 1991 | 61.2 | 54 | 74.1 | 61 | 48.2 | 55 | 0.28 | 94 | 0 |
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| 1990 | 64.5 | 22 | 77.8 | 26 | 51.2 | 23 | 1.62 | 36 | 0 |
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| 1989 | 61.9 | 45 | 74.9 | 54 | 48.9 | 43 | 0.69 | 70 | 0 |
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| 1988 | 58.6 | 83 | 71.7 | 84 | 45.4 | 81 | 0.65 | 73 | 0 |
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| 1987 | 61.9 | 45 | 75 | 52 | 48.7 | 47 | 0.42 | 88 | 0 |
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| 1986 | 56 | 102 | 64.9 | 108 | 47.2 | 65 | 3.46 | 8 | 0 |
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| 1985 | 57.1 | 97 | 66.4 | 107 | 47.7 | 61 | 1.48 | 40 | 0 |
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| 1984 | 57.3 | 96 | 69.7 | 95 | 44.9 | 86 | 0.85 | 64 | 0 |
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| 1983 | 59.8 | 74 | 71 | 88 | 48.5 | 50 | 1.30 | 45 | 0 |
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| 1982 | 60.6 | 61 | 72.6 | 75 | 48.5 | 50 | 0.76 | 67 | 0 |
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| 1981 | 61.8 | 49 | 74 | 63 | 49.5 | 38 | 1.99 | 27 | 0 |
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| 1980 | 61.9 | 45 | 75.1 | 50 | 48.6 | 49 | 0.61 | 75 | 0 |
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| 1979 | 64.3 | 25 | 77.1 | 33 | 51.5 | 20 | 1.26 | 46 | 0 |
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| 1978 | 65.6 | 15 | 77.7 | 30 | 53.4 | 4 | 0.34 | 91 | 0 |
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| 1977 | 60 | 73 | 69.1 | 98 | 50.8 | 29 | 4.65 | 2 | 0 |
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| 1976 | 63.7 | 28 | 77.8 | 26 | 49.6 | 37 | 0.46 | 85 | 0 |
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| 1975 | 58.1 | 88 | 68.9 | 99 | 47.3 | 64 | 1.01 | 57 | 0 |
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| 1974 | 57.7 | 93 | 70.4 | 92 | 44.9 | 86 | 0.17 | 102 | 0 |
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| 1973 | 58 | 89 | 67.5 | 105 | 48.4 | 53 | 2.13 | 23 | 0 |
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| 1972 | 60.4 | 66 | 71.7 | 84 | 49.1 | 40 | 0.08 | 105 | 0 |
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| 1971 | 59.6 | 77 | 70.2 | 93 | 49.1 | 40 | 1.35 | 42 | 0 |
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| 1970 | 60.4 | 66 | 71.9 | 83 | 48.8 | 44 | 2.48 | 21 | 0 |
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| 1969 | 63.6 | 32 | 75.2 | 48 | 51.9 | 14 | 0.06 | 106 | 0 |
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| 1968 | 60.2 | 69 | 72.4 | 77 | 48 | 58 | 0.49 | 84 | 0 |
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| 1967 | 61.9 | 45 | 72.8 | 73 | 50.9 | 25 | 1.72 | 33 | 0 |
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| 1966 | 60.6 | 61 | 72.4 | 77 | 48.7 | 47 | 0.67 | 71 | 0 |
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| 1965 | 48.9 | 107 | 59.2 | 109 | 38.6 | 107 | 2.23 | 22 | 0 |
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| 1964 | 57.7 | 93 | 71.2 | 87 | 44.2 | 92 | 0.35 | 90 | 0 |
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| 1963 | 63.7 | 28 | 75.9 | 42 | 51.6 | 17 | 1.93 | 29 | 0 |
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| 1962 | 59 | 81 | 72.2 | 81 | 45.8 | 79 | 4.22 | 4 | 0 |
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| 1961 | 56.8 | 98 | 69.7 | 95 | 43.9 | 94 | 3.25 | 12 | 0 |
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| 1960 | 63 | 37 | 78 | 23 | 47.9 | 59 | 0.36 | 89 | 0 |
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| 1959 | 60.1 | 71 | 73.6 | 67 | 46.6 | 74 | 1.31 | 44 | 0 |
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| 1958 | 62.6 | 40 | 78.7 | 22 | 46.4 | 75 | 0.25 | 98 | 0 |
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| 1957 | 58.4 | 85 | 72.4 | 77 | 44.3 | 90 | 3.21 | 13 | 0 |
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| 1956 | 58.9 | 82 | 74.6 | 57 | 43.1 | 100 | 0.45 | 87 | 0 |
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| 1955 | 61.2 | 54 | 77.1 | 33 | 45.3 | 83 | 1.44 | 41 | 0 |
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| 1954 | 59.3 | 78 | 71.5 | 86 | 47.1 | 67 | 1.72 | 33 | 0 |
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| 1953 | 61.3 | 53 | 77.9 | 24 | 44.7 | 88 | 0.56 | 79 | 0 |
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| 1952 | 65.5 | 16 | 82.2 | 6 | 48.8 | 44 | 0.28 | 94 | 0 |
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| 1951 | 56.1 | 100 | 68.5 | 100 | 43.8 | 97 | 1.91 | 30 | 0 |
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| 1950 | 61 | 56 | 73.7 | 65 | 48.2 | 55 | 1.24 | 48 | 0 |
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| 1949 | 57.8 | 91 | 73.7 | 65 | 41.9 | 104 | 0.66 | 72 | 0 |
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| 1948 | 67 | 4 | 82.7 | 4 | 51.3 | 22 | 0.09 | 104 | 0 |
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| 1947 | 60.5 | 64 | 75.1 | 50 | 45.9 | 78 | 1.23 | 49 | 0 |
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| 1946 | 60.1 | 71 | 73.2 | 69 | 47 | 68 | 3.75 | 6 | 0 |
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| 1945 | 58 | 89 | 72.1 | 82 | 44 | 93 | 1.65 | 35 | 0 |
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| 1944 | 59.1 | 79 | 72.8 | 73 | 45.5 | 80 | 0.93 | 61 | 0 |
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| 1943 | 59.1 | 79 | 74.8 | 56 | 43.4 | 98 | 0.26 | 96 | 0 |
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| 1942 | 56 | 102 | 69.6 | 97 | 42.4 | 103 | 0.94 | 60 | 0 |
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| 1941 | 60.7 | 59 | 72.3 | 80 | 49.1 | 40 | 4.05 | 5 | 0 |
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| 1940 | 67.5 | 2 | 83.3 | 3 | 51.8 | 15 | 0.21 | 100 | 0 |
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| 1939 | 66.1 | 11 | 84.4 | 2 | 47.8 | 60 | 0.18 | 101 | 0 |
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| 1938 | 65.9 | 12 | 79 | 21 | 52.7 | 8 | 2.64 | 19 | 1 |
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| 1937 | 64.4 | 24 | 77.9 | 24 | 50.9 | 25 | 0.52 | 82 | 0 |
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| 1936 | 66.2 | 8 | 81.1 | 14 | 51.2 | 23 | 0.15 | 103 | 0 |
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| 1935 | 64.6 | 21 | 81.4 | 12 | 47.7 | 61 | 0.26 | 96 | 0 |
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| 1934 | 58.4 | 85 | 70.8 | 89 | 45.1 | 84 | 0.34 | 91 | 1 |
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| 1933 | 66.9 | 6 | 82.4 | 5 | 51.4 | 21 | 0.58 | 78 | 0 |
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| 1932 | 61.7 | 50 | 76.7 | 37 | 46.7 | 71 | 1.50 | 39 | 0 |
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| 1931 | | | 81.8 | 8 | | | 1.05 | 56 | 4 |
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| 1930 | 59.7 | 75 | 76 | 40 | 43.3 | 99 | 1.25 | 47 | 0 |
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| 1929 | 56.1 | 100 | 68.2 | 102 | 43.9 | 94 | 2.11 | 24 | 0 |
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| 1928 | 57.7 | 93 | 74.1 | 61 | 41.3 | 105 | 0.60 | 76 | 0 |
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| 1927 | 60.7 | 59 | 75.2 | 48 | 46.2 | 77 | 2.50 | 20 | 0 |
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| 1920 | 65.1 | 19 | 80.9 | 15 | 49.3 | 39 | 1.10 | 54 | 3 |
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| 1918 | 53.6 | 106 | 68 | 103 | 39.5 | 106 | | | 3 |
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| 1917 | | | 72.6 | 75 | | | 1.17 | 51 | 30 |
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| 1916 | 60.5 | 64 | 77 | 35 | 43.9 | 94 | 0.77 | 66 | 3 |
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| 1915 | 57.8 | 91 | 73.1 | 70 | 42.5 | 102 | 2.94 | 15 | 0 |
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| 1914 | 65.8 | 14 | 81.7 | 9 | 50 | 35 | 0.54 | 80 | 0 |
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| 1913 | 63.5 | 34 | 79.3 | 16 | 47.7 | 61 | 0.79 | 65 | 0 |
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| 1912 | 55.4 | 105 | 67.6 | 104 | 43.1 | 100 | 1.34 | 43 | 0 |
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| 1911 | 63.6 | 32 | 74.3 | 60 | 53.8 | 3 | 1.51 | 38 | 3 |
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