September weather in Spokane, WA
The average temperature in Spokane in September is 61.4°F (46.8°F–76.0°F). Average precipitation: 0.68 inches.
September is a fall month in Spokane, and is warmer than the annual average of 49.8°F. Daily temperatures swing about 29.2°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 12h 19m. For travel, September is a comfortable month to visit.
Avg High
76.0°F
Avg Low
46.8°F
Precipitation
0.68 in
Daylight
12h 19m
September records in Spokane
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 102.0°F (2025) | 37.0°F (1999) | 0.08 in (2009) |
| September 2 | 102.9°F (2025) | 37.9°F (1999) | 0.16 in (2016) |
| September 3 | 102.0°F (2025) | 41.0°F (1999) | 0.15 in (2014) |
| September 4 | 97.0°F (2025) | 39.9°F (2015) | 0.10 in (2013) |
| September 5 | 98.1°F (2024) | 43.0°F (2005) | 0.57 in (2013) |
| September 6 | 97.0°F (2024) | 41.0°F (2001) | 0.17 in (2009) |
| September 7 | 99.0°F (2024) | 37.9°F (1999) | 0.15 in (2003) |
| September 8 | 93.9°F (2011) | 39.0°F (1999) | 0.61 in (2003) |
| September 9 | 95.0°F (2011) | 37.0°F (2000) | 0.21 in (2019) |
| September 10 | 95.0°F (2011) | 43.0°F (2007) | 0.51 in (2000) |
| September 11 | 93.9°F (2011) | 37.0°F (2012) | 0.32 in (2004) |
| September 12 | 91.9°F (2011) | 35.1°F (2014) | 0.12 in (2005) |
| September 13 | 91.9°F (2013) | 37.0°F (2016) | 0.07 in (2004) |
| September 14 | 93.0°F (2013) | 37.9°F (2016) | 0.18 in (2025) |
| September 15 | 91.0°F (2013) | 36.0°F (2006) | 0.21 in (2004) |
| September 16 | 93.0°F (2009) | 37.0°F (2017) | 0.14 in (2002) |
| September 17 | 91.0°F (2008) | 41.0°F (2017) | 0.39 in (2002) |
| September 18 | 90.0°F (2025) | 39.9°F (2018) | 0.27 in (2017) |
| September 19 | 91.0°F (2008) | 39.0°F (2004) | 0.55 in (2017) |
| September 20 | 88.0°F (2025) | 37.9°F (2004) | 0.35 in (2017) |
| September 21 | 89.1°F (2014) | 36.0°F (2005) | 0.58 in (2008) |
| September 22 | 87.1°F (1999) | 30.9°F (2000) | 0.07 in (2022) |
| September 23 | 91.0°F (2001) | 26.1°F (2000) | 0.13 in (2020) |
| September 24 | 93.9°F (2011) | 32.0°F (2000) | 0.13 in (2013) |
| September 25 | 84.9°F (2001) | 33.1°F (2000) | 0.18 in (2001) |
| September 26 | 87.1°F (2022) | 36.0°F (1999) | 0.13 in (2023) |
| September 27 | 91.9°F (2022) | 32.0°F (1999) | 0.52 in (2021) |
| September 28 | 87.1°F (2025) | 30.0°F (1999) | 0.66 in (2019) |
| September 29 | 84.0°F (2006) | 35.1°F (2007) | 0.59 in (2022) |
| September 30 | 82.9°F (2008) | 35.1°F (1999) | 0.65 in (2005) |