Every November in Helena, MT from 1880 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 | 38.7 | 20 | 48.8 | 14 | 28.5 | 19 | 0.42 | 78 | 0 |
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| 2024 | 35.3 | 38 | 44.6 | 49 | 25.9 | 38 | 0.45 | 76 | 0 |
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| 2023 | 37.1 | 27 | 48.2 | 18 | 25.9 | 38 | 0.02 | 143 | 0 |
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| 2022 | 21.3 | 142 | 30.8 | 141 | 11.9 | 142 | 0.92 | 27 | 0 |
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| 2021 | 39.7 | 10 | 50.9 | 5 | 28.5 | 19 | 0.20 | 115 | 0 |
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| 2020 | 35.6 | 36 | 46.9 | 30 | 24.4 | 55 | 0.36 | 84 | 0 |
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| 2019 | 31.6 | 85 | 42.2 | 74 | 20.9 | 99 | 0.81 | 40 | 0 |
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| 2018 | 33.2 | 70 | 43.1 | 65 | 23.2 | 71 | 0.22 | 113 | 0 |
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| 2017 | 31.6 | 85 | 41.1 | 89 | 22.2 | 88 | 1.06 | 21 | 0 |
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| 2016 | 41.4 | 1 | 53.3 | 1 | 29.4 | 15 | 0.02 | 143 | 0 |
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| 2015 | 30.8 | 100 | 39.9 | 101 | 21.7 | 92 | 0.83 | 38 | 0 |
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| 2014 | 28.4 | 119 | 38.5 | 112 | 18.3 | 120 | 1.07 | 18 | 0 |
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| 2013 | 33.5 | 66 | 43.8 | 56 | 23.2 | 71 | 0.15 | 124 | 0 |
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| 2012 | 34.7 | 43 | 44.2 | 52 | 25.1 | 48 | 1.78 | 5 | 0 |
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| 2011 | 31.6 | 85 | 42.6 | 72 | 20.6 | 104 | 0.77 | 41 | 0 |
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| 2010 | 27.4 | 127 | 37 | 125 | 17.7 | 122 | 1.33 | 14 | 0 |
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| 2009 | 36.6 | 32 | 47.9 | 22 | 25.4 | 43 | 0.13 | 130 | 0 |
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| 2008 | 40.4 | 5 | 49.8 | 11 | 30.9 | 9 | 0.86 | 33 | 0 |
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| 2007 | 34.4 | 53 | 44.2 | 52 | 24.6 | 53 | 0.63 | 52 | 0 |
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| 2006 | 32.8 | 75 | 43.2 | 64 | 22.3 | 85 | 0.55 | 59 | 0 |
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| 2005 | 34.6 | 46 | 44.4 | 51 | 24.7 | 51 | 0.77 | 41 | 0 |
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| 2004 | 35.3 | 38 | 45.8 | 38 | 24.8 | 49 | 0.10 | 138 | 0 |
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| 2003 | 28.8 | 118 | 39.1 | 107 | 18.4 | 119 | 0.20 | 115 | 0 |
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| 2002 | 34.6 | 46 | 43.6 | 61 | 25.5 | 42 | 0.50 | 66 | 0 |
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| 2001 | 39.2 | 14 | 50.6 | 6 | 27.8 | 23 | 0.13 | 130 | 0 |
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| 2000 | 22 | 141 | 30.6 | 142 | 13.3 | 137 | 0.36 | 84 | 0 |
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| 1999 | 39.2 | 14 | 52.2 | 2 | 26.2 | 35 | 0.13 | 130 | 0 |
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| 1998 | 34.5 | 50 | 43.3 | 63 | 25.7 | 40 | 1.07 | 18 | 0 |
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| 1997 | 31.2 | 91 | 41.6 | 80 | 20.7 | 101 | 0.13 | 130 | 0 |
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| 1996 | 23.1 | 138 | 33.8 | 135 | 12.4 | 139 | 0.84 | 34 | 0 |
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| 1995 | 34.4 | 53 | 45.8 | 38 | 22.9 | 79 | 0.62 | 53 | 0 |
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| 1994 | 28.3 | 120 | 38.9 | 108 | 17.7 | 122 | 0.55 | 59 | 0 |
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| 1993 | 26.8 | 130 | 36.8 | 127 | 16.8 | 130 | 0.36 | 84 | 0 |
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| 1992 | 32.8 | 75 | 41.4 | 85 | 24.2 | 58 | 0.19 | 118 | 0 |
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| 1991 | 29.7 | 107 | 40.5 | 98 | 19 | 116 | 0.88 | 30 | 0 |
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| 1990 | 37.4 | 25 | 49.3 | 13 | 25.4 | 43 | 0.36 | 84 | 0 |
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| 1989 | 36.8 | 31 | 47.5 | 24 | 26.1 | 36 | 0.26 | 106 | 0 |
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| 1988 | 33.7 | 62 | 43.1 | 65 | 24.4 | 55 | 0.69 | 47 | 0 |
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| 1987 | 34.7 | 43 | 47.1 | 28 | 22.3 | 85 | 0.12 | 135 | 0 |
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| 1986 | 28.9 | 117 | 40.7 | 95 | 17.2 | 126 | 0.54 | 61 | 0 |
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| 1985 | 12.6 | 146 | 21.8 | 146 | 3.4 | 146 | 0.84 | 34 | 0 |
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| 1984 | 33 | 71 | 44.1 | 54 | 22 | 89 | 0.47 | 73 | 0 |
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| 1983 | 34.6 | 46 | 43.6 | 61 | 25.7 | 40 | 0.26 | 106 | 0 |
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| 1982 | 27.4 | 127 | 37.3 | 123 | 17.5 | 124 | 0.31 | 96 | 0 |
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| 1981 | 36.3 | 33 | 47.5 | 24 | 25.2 | 47 | 0.54 | 61 | 0 |
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| 1980 | 34.9 | 41 | 46.6 | 33 | 23.1 | 74 | 0.32 | 92 | 0 |
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| 1979 | 29 | 114 | 40.5 | 98 | 17.5 | 124 | 0.06 | 139 | 0 |
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| 1978 | 22.7 | 140 | 33.3 | 137 | 12.1 | 141 | 1.19 | 16 | 0 |
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| 1977 | 31.2 | 91 | 42.1 | 76 | 20.3 | 107 | 0.48 | 69 | 0 |
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| 1976 | 33.8 | 60 | 45.8 | 38 | 21.8 | 91 | 0.30 | 100 | 0 |
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| 1975 | 29.9 | 106 | 41 | 90 | 18.8 | 117 | 0.48 | 69 | 0 |
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| 1974 | 34.7 | 43 | 44.7 | 48 | 24.6 | 53 | 0.30 | 100 | 0 |
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| 1973 | 24.5 | 136 | 32.2 | 140 | 16.8 | 130 | 1.03 | 25 | 0 |
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| 1972 | 31.1 | 95 | 39.8 | 104 | 22.4 | 83 | 0.33 | 91 | 0 |
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| 1971 | 33.6 | 64 | 44.8 | 47 | 22.4 | 83 | 0.34 | 89 | 0 |
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| 1970 | 29.3 | 112 | 41.5 | 82 | 17.1 | 127 | 0.44 | 77 | 0 |
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| 1969 | 33.5 | 66 | 45.8 | 38 | 21.1 | 97 | 0.04 | 141 | 0 |
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| 1968 | 33.5 | 66 | 43.7 | 59 | 23.3 | 70 | 0.92 | 27 | 0 |
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| 1967 | 32.9 | 73 | 43.1 | 65 | 22.8 | 80 | 0.31 | 96 | 0 |
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| 1966 | 33.8 | 60 | 45.5 | 42 | 22 | 89 | 1.04 | 23 | 0 |
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| 1965 | 34.6 | 46 | 45.9 | 37 | 23.4 | 67 | 0.62 | 53 | 0 |
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| 1964 | 30.5 | 104 | 42.8 | 70 | 18.2 | 121 | 0.53 | 63 | 0 |
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| 1963 | 34.8 | 42 | 46.4 | 34 | 23.2 | 71 | 0.29 | 103 | 0 |
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| 1962 | 36.9 | 29 | 47.4 | 27 | 26.3 | 33 | 0.57 | 58 | 0 |
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| 1961 | 27.8 | 122 | 38.7 | 110 | 16.9 | 128 | 0.37 | 83 | 0 |
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| 1960 | 33.6 | 64 | 43.8 | 56 | 23.4 | 67 | 0.19 | 118 | 0 |
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| 1959 | 24.3 | 137 | 36.3 | 128 | 12.2 | 140 | 1.45 | 10 | 0 |
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| 1958 | 30.9 | 97 | 42.9 | 69 | 18.8 | 117 | 0.74 | 45 | 0 |
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| 1957 | 32.2 | 83 | 41.5 | 82 | 23 | 78 | 0.61 | 55 | 0 |
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| 1956 | 32.5 | 80 | 43.9 | 55 | 21.2 | 95 | 0.12 | 135 | 0 |
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| 1955 | 19.7 | 143 | 30 | 143 | 9.4 | 145 | 1.22 | 15 | 0 |
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| 1954 | 39 | 18 | 51 | 4 | 27.1 | 28 | 0.48 | 69 | 0 |
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| 1953 | 38.6 | 21 | 50.1 | 8 | 27.1 | 28 | 0.20 | 115 | 0 |
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| 1952 | 26.2 | 131 | 37.3 | 123 | 15 | 135 | 1.05 | 22 | 0 |
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| 1951 | 30.7 | 103 | 41.3 | 86 | 20.1 | 109 | 0.31 | 96 | 0 |
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| 1950 | 25.6 | 133 | 37.4 | 122 | 13.9 | 136 | 1.50 | 9 | 0 |
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| 1949 | 39.9 | 8 | 52.2 | 2 | 27.5 | 25 | 0.15 | 124 | 0 |
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| 1948 | 33.7 | 62 | 41.5 | 82 | 26 | 37 | 0.61 | 55 | 0 |
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| 1947 | 27.8 | 122 | 36.3 | 128 | 19.3 | 114 | 1.40 | 12 | 0 |
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| 1946 | 27.5 | 126 | 38 | 118 | 16.9 | 128 | 0.89 | 29 | 0 |
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| 1945 | 31.7 | 84 | 41.6 | 80 | 21.7 | 92 | 0.25 | 109 | 0 |
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| 1944 | 30.8 | 100 | 40.6 | 97 | 20.9 | 99 | 0.47 | 73 | 0 |
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| 1943 | 32.8 | 75 | 44.6 | 49 | 21.1 | 97 | 0.23 | 112 | 0 |
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| 1942 | 30.8 | 100 | 40.8 | 94 | 20.7 | 101 | 0.87 | 31 | 0 |
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| 1941 | 35.6 | 36 | 47.1 | 28 | 24 | 61 | 0.40 | 79 | 0 |
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| 1940 | 23 | 139 | 33 | 138 | 12.9 | 138 | 0.36 | 84 | 0 |
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| 1939 | 39.2 | 14 | 49.7 | 12 | 28.7 | 17 | 0.05 | 140 | 0 |
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| 1938 | 30.9 | 97 | 37.7 | 120 | 24 | 61 | 0.25 | 109 | 0 |
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| 1937 | 35.2 | 40 | 42.7 | 71 | 27.7 | 24 | 0.31 | 96 | 0 |
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| 1936 | 27.8 | 122 | 36.1 | 130 | 19.4 | 113 | 0.39 | 81 | 0 |
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| 1935 | 31.6 | 85 | 39.2 | 106 | 24 | 61 | 0.17 | 121 | 0 |
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| 1934 | 39.4 | 13 | 46.8 | 31 | 32 | 3 | 0.11 | 137 | 0 |
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| 1933 | 39.7 | 10 | 48.7 | 15 | 30.6 | 10 | 0.73 | 46 | 0 |
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| 1932 | 40 | 7 | 48.4 | 17 | 31.6 | 5 | 0.40 | 79 | 0 |
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| 1931 | 29.4 | 110 | 38.2 | 115 | 20.6 | 104 | 0.84 | 34 | 0 |
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| 1930 | 34 | 57 | 43.8 | 56 | 24.2 | 58 | 0.48 | 69 | 0 |
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| 1929 | 31.6 | 85 | 39.9 | 101 | 23.4 | 67 | 0.38 | 82 | 0 |
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| 1928 | 36.3 | 33 | 45.2 | 43 | 27.5 | 25 | 0.02 | 143 | 0 |
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| 1927 | 32.7 | 78 | 40.9 | 93 | 24.4 | 55 | 1.86 | 4 | 0 |
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| 1926 | 34.5 | 50 | 42.2 | 74 | 26.8 | 31 | 1.70 | 6 | 0 |
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| 1925 | 33.3 | 69 | 41.2 | 87 | 25.4 | 43 | 0.16 | 122 | 0 |
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| 1924 | 32.7 | 78 | 41.7 | 78 | 23.6 | 65 | 0.84 | 34 | 0 |
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| 1923 | 38.1 | 23 | 48.2 | 18 | 28 | 22 | 0.65 | 50 | 0 |
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| 1922 | 29.5 | 108 | 37.8 | 119 | 21.2 | 95 | 1.04 | 23 | 0 |
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| 1921 | 31.2 | 91 | 40.7 | 95 | 21.7 | 92 | 1.65 | 7 | 0 |
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| 1920 | 30.9 | 97 | 38.7 | 110 | 23.1 | 74 | 0.34 | 89 | 0 |
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| 1919 | 24.9 | 134 | 33.6 | 136 | 16.1 | 134 | 1.07 | 18 | 0 |
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| 1918 | 32.3 | 82 | 41 | 90 | 23.6 | 65 | 0.15 | 124 | 0 |
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| 1917 | 40.7 | 4 | 49.9 | 9 | 31.5 | 6 | 0.32 | 92 | 0 |
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| 1916 | 29 | 114 | 38.2 | 115 | 19.8 | 110 | 0.32 | 92 | 0 |
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| 1915 | 34.5 | 50 | 41.9 | 77 | 27 | 30 | 0.29 | 103 | 0 |
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| 1914 | 39.1 | 17 | 48 | 21 | 30.1 | 13 | 0.27 | 105 | 0 |
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| 1913 | 38 | 24 | 46.4 | 34 | 29.5 | 14 | 0.52 | 64 | 0 |
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| 1912 | 39.6 | 12 | 48.1 | 20 | 31.2 | 7 | 0.49 | 67 | 0 |
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| 1911 | 27.4 | 127 | 35.6 | 133 | 19.2 | 115 | 0.64 | 51 | 0 |
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| 1910 | 34 | 57 | 41.2 | 87 | 26.8 | 31 | 1.64 | 8 | 0 |
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| 1909 | 36.2 | 35 | 45.1 | 44 | 27.3 | 27 | 0.51 | 65 | 0 |
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| 1908 | 33.9 | 59 | 43.1 | 65 | 24.7 | 51 | 0.18 | 120 | 0 |
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| 1907 | 38.5 | 22 | 46.7 | 32 | 30.2 | 12 | 0.13 | 130 | 0 |
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| 1906 | 29 | 114 | 37.7 | 120 | 20.4 | 106 | 1.38 | 13 | 0 |
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| 1905 | 32.4 | 81 | 41 | 90 | 23.7 | 64 | 0.97 | 26 | 0 |
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| 1904 | 41 | 3 | 50.3 | 7 | 31.7 | 4 | 0.03 | 142 | 0 |
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| 1903 | 27.8 | 122 | 36 | 131 | 19.6 | 111 | 1.09 | 17 | 0 |
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| 1902 | 31 | 96 | 38.8 | 109 | 23.1 | 74 | 0.59 | 57 | 0 |
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| 1901 | 39.8 | 9 | 48.6 | 16 | 31.1 | 8 | 0.16 | 122 | 0 |
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| 1900 | 29.5 | 108 | 38.3 | 114 | 20.7 | 101 | 0.30 | 100 | 0 |
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| 1899 | 40.2 | 6 | 47.9 | 22 | 32.5 | 2 | 0.26 | 106 | 0 |
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| 1898 | 29.1 | 113 | 35.9 | 132 | 22.3 | 85 | 0.66 | 48 | 0 |
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| 1897 | 28.2 | 121 | 36.9 | 126 | 19.5 | 112 | 2.22 | 2 | 0 |
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| 1896 | 18.3 | 145 | 26.7 | 145 | 9.9 | 144 | 3.29 | 1 | 0 |
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| 1895 | 32.9 | 73 | 40.4 | 100 | 25.3 | 46 | 0.77 | 41 | 0 |
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| 1894 | 41.2 | 2 | 49.9 | 9 | 32.6 | 1 | 0.24 | 111 | 0 |
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| 1893 | 31.2 | 91 | 39.3 | 105 | 23.1 | 74 | 1.44 | 11 | 0 |
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| 1892 | 37.1 | 27 | 45.1 | 44 | 29 | 16 | 2.05 | 3 | 0 |
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| 1891 | 34.4 | 53 | 42.5 | 73 | 26.3 | 33 | 0.82 | 39 | 0 |
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| 1890 | 37.4 | 25 | 46.4 | 34 | 28.4 | 21 | 0.14 | 129 | 0 |
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| 1889 | 31.4 | 90 | 39.9 | 101 | 22.8 | 80 | 0.77 | 41 | 0 |
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| 1888 | 24.7 | 135 | 32.6 | 139 | 16.8 | 130 | 0.32 | 92 | 0 |
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| 1887 | 34.3 | 56 | 43.7 | 59 | 24.8 | 49 | 0.22 | 113 | 0 |
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| 1886 | 29.4 | 110 | 38.5 | 112 | 20.2 | 108 | 0.49 | 67 | 0 |
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| 1885 | 39 | 18 | 47.5 | 24 | 30.5 | 11 | 0.15 | 124 | 0 |
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| 1884 | 36.9 | 29 | 45.1 | 44 | 28.7 | 17 | 0.46 | 75 | 0 |
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| 1883 | 33 | 71 | 41.7 | 78 | 24.2 | 58 | 0.66 | 48 | 0 |
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| 1882 | 30.3 | 105 | 38.2 | 115 | 22.5 | 82 | 0.15 | 124 | 0 |
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| 1881 | 26.2 | 131 | 35.6 | 133 | 16.8 | 130 | | | 0 |
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| 1880 | 19 | 144 | 27.9 | 144 | 10.1 | 143 | 0.87 | 31 | 0 |
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