September weather in Cascade, MT
The average temperature in Cascade in September is 58.9°F (43.5°F–74.3°F). Average precipitation: 1.63 inches. Average snowfall is 0.3 inches.
September is a fall month in Cascade, and is warmer than the annual average of 47°F. Daily temperatures swing about 30.8°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 12h 19m. For travel, September is a comfortable month to visit.
Avg High
74.3°F
Avg Low
43.5°F
Precipitation
1.63 in
Snow
0.3 in
September records in Cascade
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 98.1°F (1967) | 28.9°F (2006) | 1.37 in (2008) |
| September 2 | 98.1°F (1947) | 28.0°F (1914) | 1.14 in (1953) |
| September 3 | 102.9°F (2022) | 30.9°F (1974) | 2.10 in (1909) |
| September 4 | 98.1°F (1998) | 28.9°F (1956) | 0.77 in (1912) |
| September 5 | 98.1°F (1967) | 21.9°F (1956) | 1.55 in (2015) |
| September 6 | 97.0°F (1980) | 26.1°F (1956) | 1.25 in (1894) |
| September 7 | 100.0°F (2022) | 24.1°F (1929) | 0.67 in (1946) |
| September 8 | 97.0°F (1979) | 27.0°F (1943) | 1.43 in (1995) |
| September 9 | 93.9°F (2017) | 28.9°F (1943) | 1.33 in (1986) |
| September 10 | 93.0°F (1966) | 27.0°F (1970) | 0.47 in (1998) |
| September 11 | 95.0°F (1919) | 23.0°F (1989) | 1.82 in (1915) |
| September 12 | 91.0°F (1953) | 23.0°F (1989) | 1.33 in (1978) |
| September 13 | 91.9°F (1945) | 23.0°F (1921) | 0.50 in (1939) |
| September 14 | 96.1°F (1948) | 23.0°F (1916) | 1.23 in (1917) |
| September 15 | 98.1°F (2000) | 23.0°F (1969) | 1.85 in (2017) |
| September 16 | 91.9°F (1998) | 26.1°F (1943) | 0.91 in (2006) |
| September 17 | 91.0°F (2009) | 23.0°F (1965) | 1.04 in (2005) |
| September 18 | 97.0°F (1981) | 24.1°F (1965) | 1.50 in (1988) |
| September 19 | 93.9°F (1938) | 18.0°F (1957) | 1.26 in (1925) |
| September 20 | 93.0°F (1922) | 21.9°F (1925) | 1.71 in (1968) |
| September 21 | 91.9°F (1936) | 18.0°F (1995) | 0.96 in (1940) |
| September 22 | 93.0°F (1938) | 21.9°F (1934) | 1.05 in (1945) |
| September 23 | 93.9°F (1906) | 14.0°F (2000) | 1.13 in (1930) |
| September 24 | 93.9°F (2009) | 6.1°F (1926) | 1.84 in (1917) |
| September 25 | 93.0°F (2001) | 19.0°F (1934) | 0.75 in (1948) |
| September 26 | 91.0°F (1963) | 16.0°F (1934) | 1.24 in (1929) |
| September 27 | 91.0°F (1963) | 21.0°F (1935) | 1.80 in (1982) |
| September 28 | 91.0°F (2022) | 18.0°F (1984) | 1.03 in (1954) |
| September 29 | 91.9°F (1967) | 15.1°F (1985) | 0.75 in (1925) |
| September 30 | 91.0°F (1992) | 16.0°F (1985) | 1.25 in (2009) |