September weather in Plentywood, MT
The average temperature in Plentywood in September is 55.7°F (39.9°F–71.5°F). Average precipitation: 1.26 inches.
September is a fall month in Plentywood, and is warmer than the annual average of 39.4°F. Daily temperatures swing about 31.6°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
71.5°F
Avg Low
39.9°F
Precipitation
1.26 in
Daylight
12h 20m
September records in Plentywood
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 98.1°F (1991) | 36.0°F (1994) | 0.42 in (1979) |
| September 2 | 99.0°F (2022) | 37.0°F (1994) | 1.56 in (1961) |
| September 3 | 99.0°F (2015) | 32.0°F (2008) | 1.02 in (2019) |
| September 4 | 100.9°F (1998) | 37.0°F (1986) | 1.65 in (1965) |
| September 5 | 95.0°F (1990) | 30.0°F (2018) | 0.47 in (1954) |
| September 6 | 105.1°F (1906) | 28.9°F (2018) | 0.76 in (2015) |
| September 7 | 99.0°F (1906) | 28.0°F (2004) | 0.99 in (2013) |
| September 8 | 100.9°F (1906) | 21.9°F (2020) | 1.78 in (2013) |
| September 9 | 98.1°F (1994) | 19.0°F (2020) | 0.68 in (1950) |
| September 10 | 91.9°F (2017) | 25.0°F (2001) | 0.70 in (1986) |
| September 11 | 87.1°F (1990) | 26.1°F (1906) | 0.34 in (1967) |
| September 12 | 93.9°F (1990) | 21.9°F (1989) | 1.90 in (1978) |
| September 13 | 87.1°F (2015) | 25.0°F (1906) | 0.67 in (1978) |
| September 14 | 87.1°F (2013) | 19.0°F (2007) | 0.36 in (1965) |
| September 15 | 93.9°F (1906) | 24.1°F (1999) | 2.30 in (1906) |
| September 16 | 96.1°F (1998) | 24.1°F (1999) | 1.41 in (1963) |
| September 17 | 95.0°F (2000) | 24.1°F (1999) | 0.53 in (2006) |
| September 18 | 88.0°F (2009) | 21.0°F (2010) | 0.90 in (1996) |
| September 19 | 95.0°F (2021) | 19.9°F (1991) | 1.12 in (1986) |
| September 20 | 99.0°F (2004) | 19.0°F (2013) | 0.90 in (2019) |
| September 21 | 84.0°F (1999) | 16.0°F (1995) | 1.13 in (2018) |
| September 22 | 95.0°F (1906) | 26.1°F (1995) | 1.13 in (1959) |
| September 23 | 102.0°F (1906) | 25.0°F (2000) | 0.59 in (1977) |
| September 24 | 100.0°F (1906) | 17.1°F (2000) | 0.78 in (1972) |
| September 25 | 98.1°F (1906) | 21.0°F (2000) | 1.60 in (1986) |
| September 26 | 96.1°F (2014) | 24.1°F (2001) | 0.91 in (1959) |
| September 27 | 100.9°F (1906) | 21.0°F (1985) | 0.75 in (1982) |
| September 28 | 91.9°F (1906) | 19.9°F (1999) | 0.85 in (1982) |
| September 29 | 96.1°F (1906) | 21.9°F (2018) | 0.51 in (2019) |
| September 30 | 91.0°F (1992) | 18.0°F (2003) | 0.74 in (1983) |