September weather in Fort Peck, MT
The average temperature in Fort Peck in September is 62.1°F (47.6°F–76.6°F). Average precipitation: 1.05 inches.
September is a fall month in Fort Peck, and is warmer than the annual average of 46.5°F. Daily temperatures swing about 29°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 12h 20m. For travel, September is a comfortable month to visit.
Avg High
76.6°F
Avg Low
47.6°F
Precipitation
1.05 in
Daylight
12h 20m
September records in Fort Peck
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 102.9°F (1983) | 37.9°F (1974) | 1.24 in (1973) |
| September 2 | 99.0°F (1998) | 33.1°F (1974) | 1.19 in (1961) |
| September 3 | 100.0°F (2005) | 36.0°F (1962) | 0.61 in (1965) |
| September 4 | 98.1°F (1978) | 36.0°F (1980) | 0.25 in (1993) |
| September 5 | 98.1°F (1998) | 37.9°F (1983) | 0.37 in (2016) |
| September 6 | 98.1°F (1980) | 25.0°F (1985) | 0.85 in (1995) |
| September 7 | 102.0°F (2022) | 33.1°F (1972) | 1.46 in (2019) |
| September 8 | 99.0°F (2022) | 26.1°F (2020) | 0.59 in (1991) |
| September 9 | 99.0°F (2005) | 27.0°F (1962) | 0.68 in (1983) |
| September 10 | 93.9°F (1998) | 33.1°F (1965) | 1.24 in (1961) |
| September 11 | 93.9°F (1971) | 27.0°F (1989) | 1.50 in (2019) |
| September 12 | 95.0°F (1990) | 28.9°F (1989) | 2.06 in (1978) |
| September 13 | 95.0°F (1958) | 28.0°F (1970) | 1.50 in (1978) |
| September 14 | 90.0°F (1959) | 30.9°F (1999) | 0.75 in (1967) |
| September 15 | 93.9°F (2002) | 30.9°F (1999) | 0.65 in (2017) |
| September 16 | 95.0°F (1979) | 28.0°F (1973) | 0.40 in (2017) |
| September 17 | 93.9°F (1998) | 28.9°F (1965) | 1.17 in (1996) |
| September 18 | 93.0°F (1984) | 19.9°F (1991) | 1.26 in (1978) |
| September 19 | 93.0°F (2009) | 28.9°F (1957) | 0.85 in (1978) |
| September 20 | 90.0°F (2008) | 28.0°F (1983) | 0.91 in (2018) |
| September 21 | 87.1°F (2008) | 15.1°F (1995) | 0.42 in (1968) |
| September 22 | 87.1°F (2008) | 28.9°F (1983) | 1.04 in (1959) |
| September 23 | 91.9°F (1992) | 28.9°F (1984) | 1.87 in (1977) |
| September 24 | 91.0°F (2011) | 25.0°F (2000) | 0.25 in (2016) |
| September 25 | 93.9°F (2015) | 27.0°F (1965) | 1.17 in (1986) |
| September 26 | 95.0°F (2015) | 25.0°F (1965) | 0.27 in (1976) |
| September 27 | 89.1°F (2001) | 26.1°F (1984) | 0.78 in (1982) |
| September 28 | 90.0°F (2010) | 23.0°F (1972) | 0.13 in (1982) |
| September 29 | 90.0°F (2024) | 28.0°F (1972) | 0.85 in (2019) |
| September 30 | 91.0°F (1992) | 21.0°F (1985) | 0.29 in (1962) |