September weather in Kalispell, MT
The average temperature in Kalispell in September is 54.3°F (38.3°F–70.4°F). Average precipitation: 1.17 inches.
September is a fall month in Kalispell, and is warmer than the annual average of 43.1°F. Daily temperatures swing about 32.1°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 20m. For travel, September is a comfortable month to visit.
Avg High
70.4°F
Avg Low
38.3°F
Precipitation
1.17 in
Daylight
12h 20m
September records in Kalispell
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 99.0°F (1967) | 32.0°F (1999) | 2.05 in (1896) |
| September 2 | 96.1°F (1998) | 28.9°F (1959) | 0.48 in (1980) |
| September 3 | 97.0°F (1988) | 30.9°F (1974) | 1.26 in (1911) |
| September 4 | 93.0°F (1998) | 27.0°F (1962) | 0.33 in (1940) |
| September 5 | 93.9°F (1967) | 30.0°F (1956) | 0.64 in (1936) |
| September 6 | 93.0°F (1998) | 27.0°F (1969) | 0.95 in (1927) |
| September 7 | 93.0°F (2022) | 27.0°F (1992) | 0.27 in (1922) |
| September 8 | 93.9°F (1958) | 23.2°F (2020) | 0.89 in (1900) |
| September 9 | 91.9°F (1969) | 26.1°F (1959) | 0.77 in (2019) |
| September 10 | 91.9°F (1969) | 27.0°F (1972) | 1.14 in (2005) |
| September 11 | 91.9°F (1958) | 27.0°F (1921) | 0.70 in (1896) |
| September 12 | 90.0°F (1959) | 23.2°F (2014) | 1.14 in (1985) |
| September 13 | 86.0°F (1943) | 23.0°F (1970) | 1.27 in (1899) |
| September 14 | 86.0°F (2013) | 16.0°F (1970) | 0.50 in (1968) |
| September 15 | 89.1°F (1998) | 19.9°F (1970) | 0.90 in (1959) |
| September 16 | 88.0°F (2009) | 23.0°F (1973) | 0.49 in (1977) |
| September 17 | 89.1°F (1981) | 21.9°F (1973) | 0.85 in (1985) |
| September 18 | 90.0°F (1981) | 21.9°F (1971) | 1.17 in (1908) |
| September 19 | 84.9°F (2008) | 23.0°F (1983) | 0.60 in (1925) |
| September 20 | 84.9°F (1922) | 21.0°F (1934) | 0.50 in (1955) |
| September 21 | 87.1°F (1967) | 21.9°F (1971) | 0.87 in (2008) |
| September 22 | 84.0°F (1905) | 21.9°F (2000) | 0.80 in (1930) |
| September 23 | 87.1°F (2011) | 12.9°F (1926) | 1.21 in (1930) |
| September 24 | 89.1°F (2014) | 7.0°F (1926) | 0.40 in (1941) |
| September 25 | 88.0°F (2001) | 17.1°F (1926) | 0.68 in (1998) |
| September 26 | 87.1°F (1952) | 24.1°F (1900) | 0.56 in (1987) |
| September 27 | 86.0°F (1957) | 24.1°F (1985) | 0.55 in (1959) |
| September 28 | 84.9°F (1967) | 18.0°F (1985) | 0.55 in (1982) |
| September 29 | 82.0°F (1967) | 19.0°F (1985) | 0.64 in (1909) |
| September 30 | 82.0°F (1963) | 21.9°F (1971) | 0.43 in (2025) |