September weather in Donnelly, ID
The average temperature in Donnelly in September is °F (°F–°F). Average precipitation: 1.10 inches.
September is a fall month in Donnelly, and is cooler than the annual average of 0°F. Expect about 5 days with precipitation. Daylight averages about 12h 18m.
Avg High
°F
Avg Low
°F
Precipitation
1.10 in
Daylight
12h 18m
September records in Donnelly
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 95.4°F (2022) | 25.3°F (2021) | 0.00 in (2002) |
| September 2 | 93.2°F (2025) | 24.4°F (2008) | 0.10 in (2013) |
| September 3 | 97.7°F (2017) | 25.9°F (2021) | 0.20 in (2015) |
| September 4 | 93.2°F (2020) | 25.3°F (2014) | 0.20 in (2016) |
| September 5 | 92.8°F (2006) | 27.9°F (2014) | 0.30 in (2013) |
| September 6 | 90.1°F (2020) | 23.4°F (2010) | 0.10 in (2009) |
| September 7 | 93.9°F (2022) | 26.6°F (2015) | 0.10 in (2014) |
| September 8 | 90.7°F (2022) | 26.4°F (2009) | 0.40 in (2019) |
| September 9 | 85.6°F (2021) | 25.0°F (2002) | 0.60 in (2019) |
| September 10 | 86.4°F (2011) | 27.0°F (2016) | 0.00 in (2002) |
| September 11 | 87.4°F (2006) | 23.9°F (2005) | 0.00 in (2002) |
| September 12 | 89.6°F (2015) | 21.0°F (2014) | 0.60 in (2004) |
| September 13 | 85.5°F (2002) | 23.0°F (2003) | 0.30 in (2013) |
| September 14 | 84.7°F (2002) | 22.5°F (2018) | 0.30 in (2015) |
| September 15 | 86.4°F (2008) | 24.8°F (2006) | 0.30 in (2015) |
| September 16 | 87.8°F (2008) | 23.5°F (2017) | 0.30 in (2019) |
| September 17 | 86.4°F (2020) | 20.5°F (2021) | 0.60 in (2002) |
| September 18 | 81.5°F (2008) | 21.2°F (2003) | 0.80 in (2019) |
| September 19 | 85.5°F (2008) | 25.9°F (2018) | 0.50 in (2021) |
| September 20 | 83.5°F (2025) | 24.6°F (2018) | 0.60 in (2008) |
| September 21 | 79.7°F (2014) | 22.3°F (2009) | 0.30 in (2008) |
| September 22 | 81.0°F (2009) | 23.7°F (2002) | 0.40 in (2016) |
| September 23 | 84.4°F (2009) | 24.3°F (2017) | 0.20 in (2012) |
| September 24 | 86.0°F (2009) | 21.9°F (2017) | 0.30 in (2013) |
| September 25 | 83.3°F (2009) | 21.2°F (2018) | 0.30 in (2020) |
| September 26 | 81.7°F (2022) | 21.9°F (2018) | 0.10 in (2002) |
| September 27 | 83.5°F (2003) | 25.5°F (2018) | 0.30 in (2014) |
| September 28 | 85.1°F (2024) | 24.4°F (2002) | 0.60 in (2021) |
| September 29 | 82.4°F (2008) | 22.6°F (2019) | 2.10 in (2013) |
| September 30 | 84.9°F (2010) | 19.4°F (2009) | 0.90 in (2013) |