September weather in Selah, WA
The average temperature in Selah in September is 61.0°F (44.0°F–78.0°F). Average precipitation: 0.28 inches.
September is a fall month in Selah, and is warmer than the annual average of 49.2°F. Daily temperatures swing about 34°F between overnight low and afternoon high. Expect about 3 days with precipitation. Daylight averages about 12h 19m. For travel, September is a comfortable month to visit.
Avg High
78.0°F
Avg Low
44.0°F
Precipitation
0.28 in
Daylight
12h 19m
September records in Selah
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 99.0°F (1998) | 36.0°F (2000) | 0.07 in (1999) |
| September 2 | 98.1°F (1998) | 39.0°F (1999) | 0.06 in (2016) |
| September 3 | 100.9°F (1998) | 36.0°F (2000) | 0.10 in (2009) |
| September 4 | 100.0°F (2025) | 37.0°F (2002) | 0.04 in (2000) |
| September 5 | 98.1°F (2003) | 39.0°F (2002) | 0.03 in (2000) |
| September 6 | 96.1°F (1998) | 35.1°F (2002) | 0.32 in (2009) |
| September 7 | 98.1°F (1998) | 36.0°F (2002) | 0.48 in (2009) |
| September 8 | 93.0°F (1998) | 34.0°F (2002) | 0.68 in (2010) |
| September 9 | 93.9°F (2011) | 37.0°F (2000) | 0.03 in (2012) |
| September 10 | 96.1°F (2011) | 39.9°F (1998) | 0.06 in (2000) |
| September 11 | 97.0°F (2011) | 39.0°F (2007) | 0.15 in (2021) |
| September 12 | 95.0°F (2013) | 35.1°F (2012) | 0.04 in (2004) |
| September 13 | 96.1°F (2011) | 34.0°F (2014) | 0.30 in (2022) |
| September 14 | 96.1°F (2013) | 34.0°F (2014) | 0.03 in (2025) |
| September 15 | 95.0°F (2001) | 37.9°F (2008) | 0.07 in (2006) |
| September 16 | 95.0°F (2001) | 33.1°F (2006) | 0.07 in (2019) |
| September 17 | 93.9°F (1998) | 35.1°F (2006) | 0.05 in (2002) |
| September 18 | 90.0°F (2000) | 34.0°F (2002) | 0.23 in (2019) |
| September 19 | 89.1°F (1999) | 33.1°F (2004) | 0.19 in (2010) |
| September 20 | 90.0°F (1999) | 35.1°F (2004) | 0.09 in (1998) |
| September 21 | 89.1°F (2025) | 33.1°F (2002) | 0.30 in (2000) |
| September 22 | 88.0°F (2014) | 30.9°F (2002) | 0.08 in (2025) |
| September 23 | 91.0°F (1999) | 25.0°F (2000) | 0.01 in (2013) |
| September 24 | 90.0°F (2001) | 27.0°F (2000) | 0.06 in (2010) |
| September 25 | 89.1°F (2001) | 28.0°F (2000) | 0.43 in (2014) |
| September 26 | 89.1°F (2003) | 30.0°F (2000) | 0.16 in (2001) |
| September 27 | 90.0°F (2003) | 30.0°F (1999) | 0.07 in (2023) |
| September 28 | 91.0°F (2003) | 28.0°F (1999) | 0.09 in (2007) |
| September 29 | 90.0°F (2003) | 28.0°F (2001) | 0.12 in (2013) |
| September 30 | 86.0°F (1998) | 28.0°F (2002) | 0.11 in (2013) |