September weather in Ossian, IA
The average temperature in Ossian in September is °F (°F–°F). Average precipitation: 3.91 inches.
September is a fall month in Ossian, and is cooler than the annual average of 0°F. Daylight averages about 12h 17m.
Avg High
°F
Avg Low
°F
Precipitation
3.91 in
Daylight
12h 17m
September records in Ossian
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | — | — | 3.81 in (2010) |
| September 2 | — | — | 0.17 in (2011) |
| September 3 | — | — | 0.81 in (2011) |
| September 4 | — | — | 1.55 in (2018) |
| September 5 | — | — | 2.08 in (2012) |
| September 6 | — | — | 3.15 in (2020) |
| September 7 | — | — | 1.55 in (2016) |
| September 8 | — | — | 1.01 in (2015) |
| September 9 | — | — | 1.49 in (2020) |
| September 10 | — | — | 2.91 in (2016) |
| September 11 | — | — | 0.50 in (2022) |
| September 12 | — | — | 1.07 in (2020) |
| September 13 | — | — | 2.67 in (2019) |
| September 14 | — | — | 0.00 in (2009) |
| September 15 | — | — | 0.56 in (2013) |
| September 16 | — | — | 2.00 in (2016) |
| September 17 | — | — | 0.20 in (2017) |
| September 18 | — | — | 0.45 in (2025) |
| September 19 | — | — | 1.16 in (2018) |
| September 20 | — | — | 1.79 in (2018) |
| September 21 | — | — | 0.76 in (2021) |
| September 22 | — | — | 3.23 in (2016) |
| September 23 | — | — | 1.70 in (2023) |
| September 24 | — | — | 0.54 in (2010) |
| September 25 | — | — | 0.60 in (2020) |
| September 26 | — | — | 1.87 in (2017) |
| September 27 | — | — | 0.97 in (2011) |
| September 28 | — | — | 0.06 in (2009) |
| September 29 | — | — | 0.39 in (2013) |
| September 30 | — | — | 0.06 in (2018) |