September weather in Pinesdale, MT
The average temperature in Pinesdale in September is 57.1°F (41.1°F–73.1°F). Average precipitation: 0.93 inches.
September is a fall month in Pinesdale, and is warmer than the annual average of 45.7°F. Daily temperatures swing about 32°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 19m. For travel, September is a comfortable month to visit.
Avg High
73.1°F
Avg Low
41.1°F
Precipitation
0.93 in
Daylight
12h 19m
September records in Pinesdale
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 96.1°F (1967) | 33.1°F (1965) | 0.48 in (2008) |
| September 2 | 93.9°F (1998) | 32.0°F (1974) | 0.39 in (1971) |
| September 3 | 95.0°F (1988) | 34.0°F (1975) | 0.10 in (1980) |
| September 4 | 93.9°F (1988) | 30.0°F (1969) | 0.23 in (1970) |
| September 5 | 89.1°F (1967) | 30.9°F (1969) | 0.32 in (2001) |
| September 6 | 89.1°F (1998) | 32.0°F (1969) | 0.40 in (1976) |
| September 7 | 91.0°F (1998) | 28.9°F (1992) | 0.23 in (1978) |
| September 8 | 87.1°F (1979) | 28.0°F (1976) | 0.70 in (1973) |
| September 9 | 90.0°F (1981) | 28.9°F (1976) | 0.57 in (2010) |
| September 10 | 89.1°F (1981) | 30.0°F (1983) | 0.68 in (2005) |
| September 11 | 88.0°F (1990) | 28.9°F (1989) | 0.64 in (1980) |
| September 12 | 90.0°F (2015) | 26.1°F (2014) | 0.81 in (1972) |
| September 13 | 90.0°F (2013) | 28.0°F (1974) | 0.53 in (1996) |
| September 14 | 87.1°F (2000) | 24.1°F (1970) | 0.47 in (1992) |
| September 15 | 88.0°F (1998) | 24.1°F (1970) | 0.46 in (1965) |
| September 16 | 91.0°F (2009) | 28.9°F (1965) | 0.57 in (1996) |
| September 17 | 87.1°F (1981) | 18.0°F (1965) | 0.83 in (2005) |
| September 18 | 90.0°F (1984) | 21.0°F (1965) | 0.37 in (1976) |
| September 19 | 88.0°F (1981) | 24.1°F (1965) | 0.60 in (1970) |
| September 20 | 89.1°F (1984) | 19.0°F (1983) | 0.77 in (1968) |
| September 21 | 90.0°F (1967) | 21.0°F (1971) | 0.32 in (2016) |
| September 22 | 87.1°F (2011) | 18.0°F (2000) | 0.20 in (1965) |
| September 23 | 91.0°F (2011) | 24.1°F (2000) | 0.96 in (2007) |
| September 24 | 93.9°F (2014) | 24.1°F (1996) | 0.42 in (1992) |
| September 25 | 91.0°F (2015) | 24.1°F (1970) | 0.38 in (1981) |
| September 26 | 86.0°F (1994) | 23.0°F (1972) | 0.18 in (1982) |
| September 27 | 86.0°F (1994) | 24.1°F (1999) | 0.58 in (1982) |
| September 28 | 87.1°F (2010) | 19.9°F (1999) | 0.28 in (1981) |
| September 29 | 82.9°F (1993) | 18.0°F (1985) | 0.24 in (1997) |
| September 30 | 84.9°F (2011) | 27.0°F (1971) | 0.58 in (1967) |