Every 1 September to 10 October in Kalispell, MT from 1899 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 | 53.8 | 37 | 67.9 | 45 | 39.7 | 39 | 2.89 | 15 | 0 |
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| 2025 | 58.4 | 2 | 75.1 | 1 | 41.7 | 14 | 1.22 | 69 | 0 |
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| 2024 | 57.7 | 4 | 74.8 | 2 | 40.6 | 31 | 0.82 | 90 | 0 |
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| 2023 | 55 | 24 | 69.1 | 35 | 40.8 | 27 | 1.25 | 66 | 0 |
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| 2022 | 56.9 | 5 | 74.6 | 4 | 39.1 | 51 | 1.10 | 75 | 0 |
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| 2021 | 53.6 | 41 | 70.9 | 22 | 36.3 | 104 | 1.00 | 81 | 0 |
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| 2020 | 55.7 | 16 | 73.8 | 6 | 37.5 | 83 | 0.37 | 121 | 0 |
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| 2019 | 51.7 | 76 | 64.8 | 81 | 38.7 | 57 | 2.74 | 17 | 0 |
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| 2018 | 50.4 | 97 | 64.8 | 81 | 35.9 | 108 | 0.94 | 83 | 0 |
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| 2017 | 51.8 | 75 | 66.9 | 56 | 36.7 | 95 | 0.70 | 104 | 0 |
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| 2016 | 51.5 | 80 | 65.6 | 77 | 37.4 | 86 | 3.04 | 12 | 0 |
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| 2015 | 53.5 | 44 | 69.5 | 32 | 37.5 | 83 | 0.89 | 85 | 0 |
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| 2014 | 54.2 | 32 | 70.3 | 28 | 38.1 | 72 | 1.15 | 73 | 0 |
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| 2013 | 53.8 | 37 | 67.3 | 53 | 40.3 | 32 | 2.65 | 19 | 0 |
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| 2012 | 52.6 | 61 | 71.5 | 16 | 33.7 | 124 | 0.80 | 93 | 0 |
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| 2011 | 55.5 | 18 | 71.5 | 16 | 39.6 | 41 | 1.70 | 52 | 0 |
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| 2010 | 54 | 35 | 67.1 | 54 | 40.9 | 22 | 1.92 | 40 | 0 |
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| 2009 | 52.4 | 65 | 70.1 | 29 | 34.6 | 119 | 0.24 | 124 | 0 |
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| 2008 | 53.5 | 44 | 69.1 | 35 | 38 | 74 | 1.45 | 61 | 0 |
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| 2007 | 53.2 | 51 | 67.8 | 46 | 38.6 | 60 | 1.56 | 60 | 0 |
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| 2006 | 52.8 | 58 | 68.9 | 37 | 36.8 | 94 | 1.18 | 70 | 0 |
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| 2005 | 50.1 | 105 | 63.7 | 97 | 36.5 | 99 | 3.08 | 11 | 0 |
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| 2004 | 51.3 | 85 | 63.4 | 102 | 39.2 | 49 | 2.03 | 34 | 0 |
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| 2003 | 54.9 | 25 | 70.6 | 24 | 39.2 | 49 | 1.96 | 36 | 0 |
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| 2002 | 52.6 | 61 | 67.4 | 50 | 37.9 | 75 | 1.30 | 65 | 0 |
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| 2001 | 54.7 | 27 | 72.3 | 12 | 37.2 | 88 | 0.76 | 100 | 0 |
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| 2000 | 49.4 | 114 | 64.5 | 84 | 34.3 | 122 | 1.40 | 62 | 0 |
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| 1999 | 49.4 | 114 | 66.9 | 56 | 31.9 | 128 | 0.65 | 106 | 0 |
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| 1998 | 55.9 | 13 | 72.7 | 11 | 39 | 54 | 2.08 | 33 | 0 |
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| 1997 | 53.5 | 44 | 66.1 | 68 | 40.8 | 27 | 1.85 | 47 | 0 |
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| 1996 | 50.8 | 94 | 64.6 | 83 | 37 | 92 | 1.79 | 49 | 0 |
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| 1995 | 51.4 | 84 | 65.7 | 73 | 37.1 | 91 | 1.86 | 46 | 0 |
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| 1994 | 53.1 | 52 | 71.4 | 18 | 34.7 | 118 | 0.75 | 101 | 0 |
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| 1993 | 51.5 | 80 | 67.5 | 47 | 35.4 | 112 | 1.91 | 42 | 0 |
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| 1992 | 51.6 | 78 | 66.9 | 56 | 36.3 | 104 | 1.07 | 77 | 0 |
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| 1991 | 52.9 | 55 | 70.5 | 27 | 35.4 | 112 | 0.67 | 105 | 0 |
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| 1990 | 55.9 | 13 | 73.4 | 7 | 38.4 | 64 | 0.30 | 123 | 0 |
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| 1989 | 51.2 | 87 | 66 | 71 | 36.5 | 99 | 1.88 | 43 | 0 |
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| 1988 | 54.4 | 31 | 70.6 | 24 | 38.3 | 66 | 2.10 | 32 | 0 |
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| 1987 | 54.6 | 28 | 72.9 | 9 | 36.3 | 104 | 0.60 | 109 | 0 |
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| 1986 | 50.3 | 102 | 59.8 | 120 | 40.8 | 27 | 3.00 | 13 | 0 |
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| 1985 | 45.3 | 128 | 55.9 | 128 | 34.8 | 117 | 4.38 | 3 | 0 |
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| 1984 | 50.4 | 97 | 64.4 | 87 | 36.4 | 101 | 1.88 | 43 | 0 |
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| 1983 | 49.1 | 118 | 63 | 104 | 35.3 | 114 | 1.84 | 48 | 0 |
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| 1982 | 50.1 | 105 | 64.3 | 89 | 36 | 107 | 1.95 | 37 | 0 |
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| 1981 | 52.3 | 66 | 68.6 | 41 | 35.9 | 108 | 0.54 | 114 | 0 |
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| 1980 | 54.2 | 32 | 69.8 | 31 | 38.6 | 60 | 0.74 | 102 | 0 |
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| 1979 | 56.2 | 11 | 74.8 | 2 | 37.6 | 81 | 0.39 | 120 | 0 |
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| 1978 | 51.9 | 73 | 65.7 | 73 | 38.2 | 69 | 0.80 | 93 | 0 |
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| 1977 | 49.6 | 111 | 62 | 110 | 37.3 | 87 | 2.29 | 27 | 0 |
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| 1976 | 54.2 | 32 | 70.9 | 22 | 37.5 | 83 | 0.59 | 111 | 0 |
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| 1975 | 52.9 | 55 | 68.2 | 43 | 37.7 | 79 | 1.59 | 57 | 0 |
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| 1974 | 51 | 92 | 68.5 | 42 | 33.5 | 125 | 1.24 | 67 | 0 |
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| 1973 | 51.2 | 87 | 66.1 | 68 | 36.4 | 101 | 0.80 | 93 | 0 |
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| 1972 | 50.1 | 105 | 65.2 | 79 | 35 | 116 | 0.88 | 86 | 0 |
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| 1971 | 49.5 | 112 | 65.5 | 78 | 33.5 | 125 | 0.46 | 117 | 0 |
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| 1970 | 47.7 | 124 | 62.4 | 106 | 33 | 127 | 1.61 | 55 | 0 |
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| 1969 | 52.5 | 64 | 66.2 | 66 | 38.9 | 55 | 1.95 | 37 | 0 |
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| 1968 | 50.5 | 96 | 62.4 | 106 | 38.7 | 57 | 3.58 | 5 | 0 |
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| 1967 | 56.8 | 6 | 74.5 | 5 | 39.1 | 51 | 0.62 | 108 | 0 |
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| 1966 | 55.7 | 16 | 72 | 14 | 39.4 | 46 | 0.79 | 96 | 0 |
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| 1965 | 46.5 | 126 | 58.6 | 125 | 34.5 | 121 | 1.17 | 71 | 0 |
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| 1964 | 48.8 | 120 | 62.3 | 108 | 35.2 | 115 | 2.40 | 25 | 0 |
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| 1963 | 56.6 | 7 | 72.2 | 13 | 40.9 | 22 | 1.60 | 56 | 0 |
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| 1962 | 51.5 | 80 | 67.4 | 50 | 35.6 | 111 | 0.63 | 107 | 0 |
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| 1961 | 47.9 | 123 | 61.5 | 112 | 34.2 | 123 | 2.19 | 29 | 0 |
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| 1960 | 53.1 | 52 | 71.6 | 15 | 34.6 | 119 | 0.46 | 117 | 0 |
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| 1959 | 49.9 | 109 | 61.2 | 115 | 38.7 | 57 | 4.52 | 2 | 0 |
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| 1958 | 52.7 | 59 | 66.5 | 63 | 38.9 | 55 | 2.21 | 28 | 0 |
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| 1957 | 52.2 | 69 | 67.4 | 50 | 37 | 92 | 1.39 | 63 | 0 |
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| 1956 | 53.5 | 44 | 68.9 | 37 | 38.1 | 72 | 1.01 | 80 | 0 |
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| 1955 | 51.3 | 85 | 64.4 | 87 | 38.2 | 69 | 2.48 | 22 | 0 |
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| 1954 | 50.4 | 97 | 63.5 | 100 | 37.2 | 88 | 0.83 | 88 | 0 |
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| 1953 | 54.6 | 28 | 71 | 21 | 38.2 | 69 | 0.44 | 119 | 0 |
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| 1952 | 55.5 | 18 | 73.3 | 8 | 37.8 | 77 | 0.12 | 128 | 0 |
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| 1951 | 51.5 | 80 | 63.4 | 102 | 39.6 | 41 | 2.72 | 18 | 0 |
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| 1950 | 51.9 | 73 | 66.6 | 62 | 37.2 | 88 | 0.91 | 84 | 0 |
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| 1949 | 51.7 | 76 | 65.8 | 72 | 37.7 | 79 | 1.79 | 49 | 0 |
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| 1948 | 52.6 | 61 | 66.1 | 68 | 39.1 | 51 | 0.22 | 125 | 0 |
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| 1947 | 53.4 | 48 | 64.1 | 94 | 42.8 | 5 | 1.92 | 40 | 0 |
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| 1946 | 51 | 92 | 61.9 | 111 | 40.1 | 35 | 2.56 | 20 | 0 |
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| 1945 | 52.1 | 70 | 64.3 | 89 | 39.8 | 38 | 1.57 | 58 | 0 |
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| 1944 | 54.5 | 30 | 66.9 | 56 | 42.2 | 9 | 0.81 | 91 | 0 |
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| 1943 | 56.6 | 7 | 71.4 | 18 | 41.8 | 11 | 1.03 | 79 | 0 |
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| 1942 | 55.3 | 22 | 68.8 | 40 | 41.9 | 10 | 0.34 | 122 | 0 |
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| 1941 | 49.1 | 118 | 57.5 | 126 | 40.7 | 30 | 2.75 | 16 | 0 |
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| 1940 | 58.3 | 3 | 68.9 | 37 | 47.7 | 1 | 1.87 | 45 | 0 |
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| 1939 | 53.9 | 36 | 66.4 | 64 | 41.5 | 16 | 0.96 | 82 | 0 |
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| 1938 | 59.8 | 1 | 72.8 | 10 | 46.8 | 2 | 1.73 | 51 | 1 |
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| 1937 | 55.1 | 23 | 67.5 | 47 | 42.7 | 6 | 1.57 | 58 | 0 |
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| 1936 | 53.3 | 49 | 67 | 55 | 39.6 | 41 | 1.32 | 64 | 0 |
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| 1935 | 56.5 | 9 | 71.4 | 18 | 41.6 | 15 | 0.14 | 127 | 0 |
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| 1934 | 51.6 | 78 | 63.5 | 100 | 39.7 | 39 | 0.71 | 103 | 0 |
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| 1933 | 52.3 | 66 | 65 | 80 | 39.5 | 44 | 1.04 | 78 | 0 |
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| 1932 | 52 | 72 | 66.2 | 66 | 37.8 | 77 | 0.19 | 126 | 0 |
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| 1931 | 52.9 | 55 | 64.3 | 89 | 41.5 | 16 | 3.10 | 10 | 0 |
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| 1930 | 55.4 | 20 | 66.7 | 61 | 44.1 | 3 | 3.49 | 7 | 0 |
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| 1929 | 51.1 | 90 | 63.7 | 97 | 38.6 | 60 | 0.60 | 109 | 0 |
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| 1928 | 53.3 | 49 | 65.7 | 73 | 40.9 | 22 | 0.53 | 115 | 0 |
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| 1927 | 50.2 | 104 | 59.1 | 123 | 41.3 | 19 | 5.44 | 1 | 0 |
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| 1926 | 46.3 | 127 | 56.1 | 127 | 36.4 | 101 | 2.56 | 20 | 0 |
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| 1925 | 50.3 | 102 | 60.4 | 118 | 40.2 | 34 | 2.48 | 22 | 0 |
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| 1924 | 51.2 | 87 | 63.9 | 96 | 38.5 | 63 | 1.14 | 74 | 0 |
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| 1923 | 55.8 | 15 | 70.1 | 29 | 41.5 | 16 | 0.58 | 112 | 0 |
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| 1922 | 56.2 | 11 | 69.2 | 34 | 43.2 | 4 | 1.16 | 72 | 0 |
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| 1921 | 48.8 | 120 | 60.9 | 116 | 36.7 | 95 | 0.79 | 96 | 0 |
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| 1920 | 53 | 54 | 64.2 | 92 | 41.8 | 11 | 1.08 | 76 | 0 |
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| 1919 | 51.1 | 90 | 64 | 95 | 38.3 | 66 | 0.58 | 112 | 0 |
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| 1918 | 54.9 | 25 | 67.5 | 47 | 42.3 | 8 | 1.68 | 53 | 1 |
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| 1917 | 56.5 | 9 | 70.6 | 24 | 42.4 | 7 | 0.83 | 88 | 0 |
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| 1916 | 49.4 | 114 | 62.3 | 108 | 36.6 | 98 | 1.66 | 54 | 0 |
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| 1915 | 49.8 | 110 | 61.4 | 113 | 38.3 | 66 | 2.31 | 26 | 0 |
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| 1914 | 50.1 | 105 | 60.7 | 117 | 39.4 | 46 | 4.15 | 4 | 0 |
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| 1913 | 50.4 | 97 | 64.2 | 92 | 36.7 | 95 | 0.79 | 96 | 0 |
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| 1912 | 47.3 | 125 | 58.7 | 124 | 35.9 | 108 | 0.78 | 99 | 0 |
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| 1911 | 50.4 | 97 | 61.4 | 113 | 39.4 | 46 | 3.51 | 6 | 0 |
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| 1910 | 52.1 | 70 | 63 | 104 | 41.3 | 19 | 3.14 | 9 | 0 |
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| 1909 | 53.6 | 41 | 66.4 | 64 | 40.9 | 22 | 1.24 | 67 | 0 |
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| 1908 | 53.8 | 37 | 68 | 44 | 39.5 | 44 | 2.01 | 35 | 0 |
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| 1907 | 52.3 | 66 | 64.5 | 84 | 40.1 | 35 | 2.12 | 31 | 0 |
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| 1906 | 55.4 | 20 | 69.5 | 32 | 41.3 | 19 | 0.48 | 116 | 0 |
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| 1905 | 53.7 | 40 | 65.7 | 73 | 41.8 | 11 | 2.15 | 30 | 0 |
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| 1904 | 53.6 | 41 | 66.9 | 56 | 40.3 | 32 | 0.81 | 91 | 0 |
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| 1903 | 48.8 | 120 | 59.6 | 121 | 37.9 | 75 | 2.46 | 24 | 0 |
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| 1902 | 50.6 | 95 | 63.6 | 99 | 37.6 | 81 | 0.87 | 87 | 0 |
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| 1901 | 49.3 | 117 | 60.2 | 119 | 38.4 | 64 | 1.95 | 37 | 0 |
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| 1900 | 49.5 | 112 | 59.2 | 122 | 39.9 | 37 | 3.44 | 8 | 0 |
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| 1899 | 52.7 | 59 | 64.5 | 84 | 40.9 | 22 | 3.00 | 13 | 0 |
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