September weather in Irrigon, OR
The average temperature in Irrigon in September is 62.7°F (45.6°F–79.8°F). Average precipitation: 0.26 inches.
September is a fall month in Irrigon, and is warmer than the annual average of 51.9°F. Daily temperatures swing about 34.2°F between overnight low and afternoon high. Expect about 4 days with precipitation. Daylight averages about 12h 18m. For travel, September is a comfortable month to visit.
Avg High
79.8°F
Avg Low
45.6°F
Precipitation
0.26 in
Daylight
12h 18m
September records in Irrigon
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.0°F (2022) | 39.0°F (2006) | 0.24 in (2010) |
| September 2 | 100.0°F (2025) | 39.9°F (2008) | 0.08 in (2016) |
| September 3 | 100.0°F (2020) | 41.0°F (2000) | 0.43 in (2013) |
| September 4 | 102.9°F (2020) | 37.9°F (2015) | 0.03 in (2000) |
| September 5 | 99.0°F (2025) | 42.1°F (2014) | 0.11 in (2015) |
| September 6 | 99.0°F (2024) | 39.9°F (2002) | 0.35 in (2013) |
| September 7 | 98.1°F (2003) | 43.0°F (2015) | 0.32 in (2016) |
| September 8 | 98.1°F (2014) | 37.0°F (2001) | 0.05 in (2003) |
| September 9 | 98.1°F (2014) | 37.0°F (2020) | 0.06 in (2003) |
| September 10 | 93.9°F (2011) | 41.0°F (2007) | 0.20 in (2000) |
| September 11 | 93.9°F (2013) | 37.9°F (2012) | 0.16 in (2000) |
| September 12 | 93.9°F (2013) | 34.0°F (2014) | 0.38 in (2024) |
| September 13 | 93.9°F (2013) | 36.0°F (2012) | 0.02 in (2004) |
| September 14 | 93.9°F (2013) | 35.1°F (2016) | 0.10 in (2025) |
| September 15 | 93.9°F (2013) | 37.0°F (2014) | 0.01 in (2017) |
| September 16 | 93.0°F (2013) | 37.0°F (2014) | 0.61 in (2013) |
| September 17 | 96.1°F (2014) | 37.0°F (2014) | 0.14 in (2019) |
| September 18 | 96.1°F (2014) | 37.0°F (2014) | 0.17 in (2017) |
| September 19 | 91.0°F (2025) | 37.9°F (2004) | 0.18 in (2010) |
| September 20 | 91.9°F (2014) | 36.0°F (2007) | 0.15 in (2017) |
| September 21 | 99.0°F (2014) | 36.0°F (2002) | 0.16 in (2023) |
| September 22 | 99.0°F (2014) | 33.1°F (2002) | 0.05 in (2025) |
| September 23 | 91.9°F (2014) | 28.9°F (2000) | 0.07 in (2013) |
| September 24 | 90.0°F (2011) | 28.9°F (2000) | 0.07 in (2013) |
| September 25 | 93.0°F (2024) | 34.0°F (2005) | 0.05 in (2023) |
| September 26 | 93.0°F (2024) | 33.1°F (2000) | 0.02 in (2001) |
| September 27 | 89.1°F (2021) | 33.1°F (2015) | 0.07 in (2007) |
| September 28 | 88.0°F (2003) | 32.0°F (2015) | 0.50 in (2021) |
| September 29 | 87.1°F (2010) | 34.0°F (2015) | 0.08 in (2013) |
| September 30 | 88.0°F (2020) | 34.0°F (2019) | 0.32 in (2000) |