September weather in Ione, WA
The average temperature in Ione in September is °F (°F–°F). Average precipitation: 2.08 inches.
September is a fall month in Ione, and is cooler than the annual average of 0°F. Expect about 7 days with precipitation. Daylight averages about 12h 20m.
Avg High
°F
Avg Low
°F
Precipitation
2.08 in
Daylight
12h 20m
September records in Ione
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 85.8°F (2025) | 27.1°F (1999) | 0.30 in (1986) |
| September 2 | 87.8°F (2025) | 25.3°F (1999) | 0.50 in (2000) |
| September 3 | 86.7°F (2025) | 26.2°F (2011) | 0.90 in (1997) |
| September 4 | 84.2°F (2006) | 24.3°F (2015) | 0.20 in (1992) |
| September 5 | 86.9°F (2006) | 27.1°F (1994) | 0.40 in (1982) |
| September 6 | 85.5°F (2006) | 24.4°F (2002) | 0.50 in (2013) |
| September 7 | 83.1°F (2017) | 19.4°F (1992) | 0.70 in (2016) |
| September 8 | 81.1°F (2024) | 23.9°F (2020) | 1.30 in (2003) |
| September 9 | 84.0°F (2011) | 25.2°F (1992) | 1.10 in (1994) |
| September 10 | 82.9°F (2011) | 27.0°F (1992) | 0.90 in (1982) |
| September 11 | 80.6°F (2011) | 23.2°F (2014) | 0.90 in (1993) |
| September 12 | 82.8°F (2013) | 19.0°F (2014) | 0.40 in (1997) |
| September 13 | 81.9°F (2013) | 23.0°F (2016) | 0.30 in (1996) |
| September 14 | 79.0°F (2013) | 24.6°F (1992) | 0.80 in (2022) |
| September 15 | 79.2°F (2001) | 25.7°F (1992) | 1.00 in (1982) |
| September 16 | 76.3°F (2009) | 24.3°F (2017) | 1.00 in (1997) |
| September 17 | 77.0°F (2008) | 23.9°F (2017) | 1.30 in (1997) |
| September 18 | 78.1°F (2008) | 22.8°F (1992) | 0.80 in (1988) |
| September 19 | 77.0°F (2008) | 24.6°F (2018) | 1.30 in (2010) |
| September 20 | 74.3°F (2012) | 25.0°F (1995) | 1.10 in (1984) |
| September 21 | 77.0°F (2012) | 21.9°F (1995) | 1.00 in (2008) |
| September 22 | 73.8°F (2009) | 19.0°F (2000) | 0.20 in (2013) |
| September 23 | 80.2°F (2009) | 14.4°F (2000) | 1.90 in (1986) |
| September 24 | 78.3°F (2011) | 19.8°F (1996) | 0.60 in (1992) |
| September 25 | 82.0°F (2001) | 20.7°F (1996) | 0.90 in (1982) |
| September 26 | 73.2°F (1991) | 22.1°F (1999) | 0.90 in (1986) |
| September 27 | 77.5°F (2022) | 22.3°F (1999) | 0.90 in (1986) |
| September 28 | 74.1°F (2022) | 16.0°F (1999) | 1.80 in (2013) |
| September 29 | 70.5°F (2006) | 22.1°F (2019) | 1.10 in (1986) |
| September 30 | 74.8°F (1992) | 12.7°F (2019) | 1.40 in (1995) |