Every summer in Deer Lodge, MT from 1895 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 | 61.3 | 29 | 79.2 | 24 | 43.4 | 32 | 3.58 | 52 | 0 |
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| 2025 | 61 | 37 | 79.1 | 26 | 42.9 | 43 | 2.41 | 78 | 4 |
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| 2024 | | | | | | | 2.00 | 80 | 44 |
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| 2023 | 61.5 | 21 | 78.3 | 41 | 44.7 | 16 | 5.30 | 21 | 9 |
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| 2022 | 61.5 | 21 | 79.9 | 16 | 43.2 | 36 | 3.39 | 59 | 3 |
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| 2021 | 62.9 | 7 | 81.7 | 5 | 44 | 26 | 2.85 | 70 | 1 |
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| 2020 | 58.6 | 72 | 75.4 | 76 | 41.8 | 55 | 5.52 | 20 | 0 |
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| 2019 | 59.1 | 61 | 75.9 | 66 | 42.4 | 48 | 3.97 | 46 | 0 |
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| 2018 | | | | | | | | | 32 |
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| 2017 | | | | | | | | | 62 |
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| 2016 | | | | | | | | | 62 |
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| 2015 | 61.4 | 25 | 79.4 | 21 | 43.4 | 32 | | | 1 |
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| 2014 | | | | | | | | | 16 |
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| 2013 | 61.8 | 18 | 80.9 | 10 | 42.7 | 46 | | | 0 |
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| 2010 | | | | | | | | | 30 |
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| 2009 | 58.5 | 74 | 75.6 | 71 | 41.3 | 61 | 4.54 | 32 | 1 |
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| 2008 | | | | | | | | | 17 |
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| 2007 | 62.1 | 14 | 81.3 | 8 | 42.8 | 45 | 1.98 | 81 | 1 |
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| 2006 | 61.6 | 20 | 80.6 | 12 | 42.7 | 46 | 4.48 | 35 | 1 |
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| 2005 | 58.4 | 76 | 76.8 | 58 | 39.9 | 79 | 4.51 | 34 | 1 |
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| 2004 | | | | | | | | | 33 |
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| 2003 | | | | | | | | | 27 |
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| 2002 | | | | | | | | | 32 |
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| 2001 | | | | | | | | | 38 |
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| 2000 | | | | | | | | | 37 |
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| 1999 | | | | | | | | | 34 |
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| 1998 | | | | | | | | | 47 |
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| 1997 | | | | | | | | | 31 |
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| 1996 | 58.8 | 69 | 77.8 | 45 | 39.6 | 82 | 4.15 | 42 | 1 |
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| 1995 | 57.4 | 81 | 76.4 | 61 | 38.3 | 85 | 6.25 | 6 | 4 |
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| 1994 | | | | | | | | | 15 |
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| 1993 | 54.6 | 85 | 70.4 | 85 | 38.7 | 84 | 9.49 | 1 | 0 |
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| 1992 | 58.2 | 79 | 75.8 | 67 | 40.6 | 72 | 5.73 | 16 | 0 |
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| 1991 | 60.1 | 47 | 78.7 | 32 | 41.6 | 59 | 4.74 | 28 | 1 |
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| 1990 | 59 | 66 | 76.8 | 58 | 41.2 | 65 | 5.20 | 24 | 0 |
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| 1989 | | | | | | | 6.05 | 11 | 11 |
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| 1988 | 60.9 | 41 | 81.3 | 8 | 40.5 | 74 | 3.62 | 51 | 0 |
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| 1987 | 56.7 | 83 | 73.9 | 82 | 39.5 | 83 | 5.59 | 18 | 2 |
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| 1986 | | | | | | | | | 15 |
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| 1985 | 58.9 | 67 | 76.9 | 57 | 41 | 67 | 2.68 | 73 | 2 |
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| 1984 | 58.3 | 78 | 75.6 | 71 | 41.1 | 66 | 4.52 | 33 | 7 |
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| 1983 | | | | | | | 2.57 | 74 | 11 |
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| 1982 | 59.6 | 53 | 77.4 | 51 | 41.8 | 55 | 4.25 | 41 | 1 |
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| 1981 | 59.1 | 61 | 77.3 | 53 | 40.9 | 68 | 2.46 | 77 | 0 |
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| 1980 | 57.7 | 80 | 75 | 78 | 40.5 | 74 | 6.25 | 6 | 0 |
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| 1979 | 61 | 37 | 80.6 | 12 | 41.4 | 60 | 2.86 | 69 | 0 |
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| 1978 | 58.9 | 67 | 77.7 | 48 | 40 | 77 | 3.10 | 62 | 2 |
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| 1977 | 59.7 | 49 | 77.7 | 48 | 41.7 | 58 | 3.54 | 55 | 0 |
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| 1976 | 58.8 | 69 | 76.2 | 64 | 41.3 | 61 | 4.92 | 26 | 0 |
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| 1975 | 59.3 | 59 | 75.5 | 73 | 42.9 | 43 | 5.84 | 15 | 1 |
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| 1974 | 61.2 | 32 | 79.2 | 24 | 43.2 | 36 | 3.51 | 56 | 0 |
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| 1973 | 61.5 | 21 | 79.8 | 17 | 43.1 | 39 | 1.89 | 82 | 0 |
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| 1972 | 61.1 | 34 | 79 | 29 | 43.3 | 35 | 2.88 | 68 | 0 |
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| 1971 | 61.1 | 34 | 79.8 | 17 | 42.4 | 48 | 2.16 | 79 | 0 |
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| 1970 | 62.4 | 9 | 80.3 | 14 | 44.4 | 21 | 5.68 | 17 | 0 |
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| 1969 | 59.3 | 59 | 77.8 | 45 | 40.9 | 68 | 4.62 | 31 | 0 |
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| 1968 | 59.1 | 61 | 75.8 | 67 | 42.3 | 51 | 4.39 | 38 | 0 |
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| 1967 | 60.8 | 43 | 78.6 | 33 | 43 | 41 | 3.80 | 47 | 0 |
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| 1966 | 59.6 | 53 | 78.4 | 35 | 40.8 | 70 | 4.30 | 39 | 0 |
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| 1965 | 58.6 | 72 | 75 | 78 | 42.2 | 53 | 4.67 | 29 | 0 |
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| 1964 | 58.4 | 76 | 76.1 | 65 | 40.7 | 71 | 4.26 | 40 | 0 |
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| 1963 | 58.8 | 69 | 76.3 | 63 | 41.3 | 61 | 5.89 | 13 | 0 |
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| 1962 | 59.7 | 49 | 75.5 | 73 | 43.8 | 27 | 3.43 | 58 | 0 |
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| 1961 | 63.6 | 4 | 84.9 | 2 | 42.3 | 51 | 1.67 | 84 | 1 |
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| 1960 | 59.9 | 48 | 79.4 | 21 | 40.2 | 76 | 3.00 | 66 | 2 |
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| 1959 | 59.1 | 61 | 78.4 | 35 | 39.9 | 79 | 3.56 | 53 | 0 |
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| 1958 | 60.9 | 41 | 76.4 | 61 | 45.5 | 9 | 6.30 | 5 | 0 |
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| 1957 | | | | | | | | | 62 |
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| 1956 | 61.4 | 25 | 78.4 | 35 | 44.1 | 24 | 5.58 | 19 | 1 |
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| 1955 | 61.3 | 29 | 77.9 | 44 | 44.7 | 16 | 7.50 | 3 | 0 |
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| 1954 | 60.6 | 45 | 76.6 | 60 | 44.7 | 16 | 4.00 | 45 | 0 |
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| 1953 | 61.2 | 32 | 78.8 | 31 | 43.6 | 31 | 3.55 | 54 | 0 |
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| 1952 | 60.5 | 46 | 77 | 56 | 44.1 | 24 | 3.15 | 61 | 0 |
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| 1951 | 59.1 | 61 | 75.3 | 77 | 43 | 41 | 4.65 | 30 | 0 |
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| 1950 | 59.5 | 56 | 75.8 | 67 | 43.2 | 36 | 4.15 | 42 | 0 |
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| 1949 | 61.3 | 29 | 78.4 | 35 | 44.2 | 23 | 4.01 | 44 | 1 |
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| 1948 | 59.7 | 49 | 75.7 | 70 | 43.7 | 29 | 6.15 | 9 | 2 |
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| 1947 | 60.8 | 43 | 78.5 | 34 | 43.1 | 39 | 6.07 | 10 | 0 |
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| 1946 | 62.1 | 14 | 79.8 | 17 | 44.5 | 20 | 3.19 | 60 | 0 |
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| 1945 | 62 | 17 | 79.1 | 26 | 44.9 | 12 | 3.08 | 63 | 1 |
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| 1944 | 59.5 | 56 | 75.5 | 73 | 43.4 | 32 | 6.18 | 8 | 2 |
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| 1943 | 61 | 37 | 77.1 | 55 | 45 | 11 | 3.75 | 50 | 1 |
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| 1942 | 61.4 | 25 | 77.3 | 53 | 45.6 | 7 | 2.82 | 71 | 0 |
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| 1941 | 62.9 | 7 | 77.8 | 45 | 47.9 | 2 | 5.92 | 12 | 0 |
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| 1940 | 64.4 | 3 | 82.9 | 3 | 46 | 5 | 2.56 | 75 | 0 |
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| 1939 | 61 | 37 | 78.4 | 35 | 43.7 | 29 | 3.07 | 64 | 1 |
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| 1938 | 62.3 | 11 | 77.7 | 48 | 46.8 | 3 | 4.81 | 27 | 0 |
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| 1937 | 61.5 | 21 | 77.4 | 51 | 45.5 | 9 | 5.26 | 22 | 0 |
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| 1936 | 65 | 1 | 81.5 | 7 | 48.5 | 1 | 3.77 | 49 | 0 |
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| 1935 | 61.4 | 25 | 78.9 | 30 | 43.8 | 27 | 2.76 | 72 | 0 |
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| 1934 | 62.4 | 9 | 80 | 15 | 44.8 | 13 | 3.46 | 57 | 1 |
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| 1933 | 63.6 | 4 | 80.8 | 11 | 46.3 | 4 | 3.03 | 65 | 0 |
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| 1932 | 62.1 | 14 | 78.3 | 41 | 45.8 | 6 | 5.23 | 23 | 0 |
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| 1931 | 63.6 | 4 | 81.6 | 6 | 45.6 | 7 | 2.96 | 67 | 0 |
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| 1930 | | | | | | | | | 62 |
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| 1929 | 62.3 | 11 | 82.8 | 4 | 41.9 | 54 | 2.50 | 76 | 0 |
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| 1923 | 61.1 | 34 | 78 | 43 | 44.4 | 21 | 7.55 | 2 | 1 |
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| 1922 | 61.8 | 18 | 79.1 | 26 | 44.6 | 19 | 7.37 | 4 | 0 |
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| 1921 | 62.2 | 13 | 79.6 | 20 | 44.8 | 13 | 4.42 | 37 | 1 |
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| 1920 | | | | | | | 5.87 | 14 | 10 |
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| 1919 | 64.6 | 2 | 87.9 | 1 | 41.3 | 61 | 0.85 | 85 | 0 |
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| 1918 | | | | | | | 3.78 | 48 | 16 |
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| 1917 | 59.5 | 56 | 78.4 | 35 | 40.6 | 72 | 1.80 | 83 | 0 |
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| 1916 | 56 | 84 | 72 | 84 | 40 | 77 | 4.44 | 36 | 0 |
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| 1913 | | | | | | | 4.94 | 25 | 92 |
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| 1905 | | | | | | | | | 76 |
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| 1904 | 58.5 | 74 | 74.6 | 81 | 42.4 | 48 | | | 2 |
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| 1903 | 59.7 | 49 | 74.7 | 80 | 44.8 | 13 | | | 2 |
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| 1902 | 57.4 | 81 | 73 | 83 | 41.8 | 55 | | | 2 |
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| 1901 | | | | | | | | | 77 |
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| 1899 | 59.6 | 53 | 79.3 | 23 | 39.9 | 79 | | | 3 |
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| 1896 | | | | | | | | | 82 |
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| 1895 | | | | | | | | | 80 |
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