September weather in Dunsmuir, CA
The average temperature in Dunsmuir in September is 64.9°F (46.2°F–83.5°F). Average precipitation: 0.68 inches.
September is a fall month in Dunsmuir, and is warmer than the annual average of 53.9°F. Daily temperatures swing about 37.3°F between overnight low and afternoon high. Expect about 2 days with precipitation. Daylight averages about 12h 16m. For travel, September is a comfortable month to visit.
Avg High
83.5°F
Avg Low
46.2°F
Precipitation
0.68 in
Daylight
12h 16m
September records in Dunsmuir
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 104.0°F (1998) | 41.0°F (1995) | 0.49 in (2000) |
| September 2 | 104.0°F (1998) | 42.1°F (1995) | 1.02 in (2023) |
| September 3 | 106.0°F (1988) | 41.0°F (1995) | 0.07 in (2000) |
| September 4 | 105.1°F (1988) | 42.1°F (1990) | 0.12 in (2000) |
| September 5 | 102.0°F (1988) | 41.0°F (2000) | 0.39 in (1978) |
| September 6 | 104.0°F (2022) | 37.9°F (2002) | 1.29 in (1978) |
| September 7 | 105.1°F (2022) | 39.0°F (2002) | 1.41 in (1985) |
| September 8 | 105.1°F (2022) | 39.9°F (2002) | 0.80 in (1998) |
| September 9 | 99.0°F (1993) | 42.1°F (2000) | 0.40 in (2025) |
| September 10 | 100.0°F (2022) | 30.9°F (1998) | 2.65 in (1978) |
| September 11 | 98.1°F (2015) | 37.0°F (1985) | 0.27 in (1978) |
| September 12 | 100.0°F (2009) | 39.0°F (2005) | 0.05 in (1996) |
| September 13 | 99.0°F (1979) | 39.0°F (1994) | 0.58 in (1997) |
| September 14 | 100.9°F (1981) | 37.9°F (1992) | 1.11 in (1996) |
| September 15 | 97.0°F (1981) | 37.9°F (1980) | 0.61 in (1986) |
| September 16 | 100.0°F (2008) | 37.0°F (2006) | 2.06 in (1986) |
| September 17 | 100.9°F (1991) | 35.1°F (2018) | 1.42 in (1989) |
| September 18 | 100.9°F (1991) | 35.1°F (2018) | 1.07 in (1989) |
| September 19 | 98.1°F (1991) | 37.9°F (2018) | 0.75 in (1982) |
| September 20 | 95.0°F (1994) | 36.0°F (1978) | 0.13 in (1984) |
| September 21 | 99.0°F (1987) | 35.1°F (2004) | 1.83 in (2013) |
| September 22 | 100.0°F (1987) | 36.0°F (2004) | 0.13 in (2007) |
| September 23 | 99.0°F (2003) | 33.1°F (2017) | 0.82 in (1983) |
| September 24 | 100.0°F (2009) | 34.0°F (2007) | 1.48 in (2001) |
| September 25 | 98.1°F (1991) | 35.1°F (2007) | 1.79 in (2014) |
| September 26 | 99.0°F (2003) | 35.1°F (1984) | 0.56 in (2023) |
| September 27 | 100.9°F (2009) | 33.1°F (1986) | 1.78 in (1981) |
| September 28 | 97.0°F (2009) | 34.0°F (1986) | 0.54 in (1994) |
| September 29 | 97.0°F (2010) | 30.9°F (1986) | 0.20 in (2013) |
| September 30 | 96.1°F (1987) | 32.0°F (2007) | 1.85 in (2013) |