September weather in Mossyrock, WA
The average temperature in Mossyrock in September is 61.2°F (48.1°F–74.3°F). Average precipitation: 2.46 inches.
September is a fall month in Mossyrock, and is warmer than the annual average of 51.6°F. Daily temperatures swing about 26.2°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 12h 19m. For travel, September is a comfortable month to visit.
Avg High
74.3°F
Avg Low
48.1°F
Precipitation
2.46 in
Daylight
12h 19m
September records in Mossyrock
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 99.0°F (2024) | 44.1°F (2011) | 1.07 in (2010) |
| September 2 | 91.9°F (2017) | 44.1°F (2011) | 0.64 in (1989) |
| September 3 | 100.9°F (2017) | 43.0°F (2012) | 0.94 in (2013) |
| September 4 | 102.9°F (2017) | 44.1°F (2011) | 0.68 in (2023) |
| September 5 | 100.0°F (2017) | 41.0°F (2018) | 0.24 in (2000) |
| September 6 | 93.0°F (2017) | 46.0°F (2015) | 2.00 in (2013) |
| September 7 | 98.1°F (2024) | 48.0°F (2011) | 0.52 in (2009) |
| September 8 | 98.1°F (2012) | 48.0°F (2022) | 0.85 in (2003) |
| September 9 | 88.0°F (2011) | 46.0°F (2016) | 0.77 in (2019) |
| September 10 | 99.0°F (2020) | 48.0°F (2016) | 0.72 in (1985) |
| September 11 | 93.9°F (2011) | 39.9°F (2012) | 0.84 in (2000) |
| September 12 | 93.0°F (2011) | 39.0°F (2012) | 0.91 in (1982) |
| September 13 | 89.1°F (2015) | 34.0°F (2014) | 0.70 in (2019) |
| September 14 | 93.9°F (2014) | 42.1°F (2012) | 0.76 in (2004) |
| September 15 | 95.0°F (2014) | 43.0°F (2014) | 1.23 in (1996) |
| September 16 | 95.0°F (2014) | 41.0°F (2021) | 0.78 in (2019) |
| September 17 | 98.1°F (2025) | 41.0°F (2021) | 0.81 in (1997) |
| September 18 | 88.0°F (2012) | 43.0°F (2018) | 1.20 in (2021) |
| September 19 | 89.1°F (2012) | 42.1°F (2018) | 0.85 in (1988) |
| September 20 | 88.0°F (2025) | 43.0°F (2018) | 0.64 in (1980) |
| September 21 | 87.1°F (2022) | 42.1°F (2024) | 0.56 in (1981) |
| September 22 | 89.1°F (2025) | 42.1°F (2015) | 0.61 in (1981) |
| September 23 | 84.9°F (2023) | 41.0°F (2015) | 0.76 in (2019) |
| September 24 | 90.0°F (2025) | 42.1°F (2015) | 1.98 in (2020) |
| September 25 | 89.1°F (2024) | 44.1°F (2012) | 1.14 in (2023) |
| September 26 | 89.1°F (2022) | 42.1°F (2013) | 0.73 in (2024) |
| September 27 | 90.0°F (2022) | 39.9°F (2015) | 0.67 in (2021) |
| September 28 | 90.0°F (2017) | 39.0°F (2015) | 1.34 in (2013) |
| September 29 | 86.0°F (2018) | 37.9°F (2015) | 1.45 in (2013) |
| September 30 | 84.9°F (2020) | 36.0°F (2019) | 1.23 in (2013) |