September weather in Mondamin, IA
The average temperature in Mondamin in September is 63.7°F (50.2°F–77.2°F). Average precipitation: 5.05 inches.
September is a fall month in Mondamin, and is warmer than the annual average of 48.1°F. Daily temperatures swing about 27°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 12h 16m. For travel, September is a wet month.
Avg High
77.2°F
Avg Low
50.2°F
Precipitation
5.05 in
Daylight
12h 16m
September records in Mondamin
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 93.9°F (2012) | 39.9°F (2009) | 1.73 in (2014) |
| September 2 | 91.9°F (2022) | 43.0°F (2009) | 0.60 in (2025) |
| September 3 | 99.0°F (2023) | 42.1°F (2008) | 1.80 in (2009) |
| September 4 | 99.0°F (2023) | 42.1°F (2006) | 1.36 in (2012) |
| September 5 | 98.1°F (2012) | 41.0°F (2025) | 0.72 in (2004) |
| September 6 | 95.0°F (2020) | 39.9°F (2025) | 0.65 in (2013) |
| September 7 | 97.0°F (2020) | 39.0°F (2025) | 0.31 in (2007) |
| September 8 | 93.9°F (2002) | 39.0°F (2012) | 1.80 in (2015) |
| September 9 | 91.9°F (2002) | 39.0°F (2008) | 1.90 in (2020) |
| September 10 | 96.1°F (2013) | 41.0°F (2008) | 2.18 in (2016) |
| September 11 | 93.9°F (2005) | 39.9°F (2007) | 1.30 in (2019) |
| September 12 | 98.1°F (2012) | 39.9°F (2007) | 1.30 in (2019) |
| September 13 | 91.9°F (2004) | 33.1°F (2014) | 0.75 in (2012) |
| September 14 | 96.1°F (2025) | 33.1°F (2014) | 1.66 in (2004) |
| September 15 | 95.0°F (2025) | 30.9°F (2007) | 1.98 in (2019) |
| September 16 | 91.9°F (2022) | 32.0°F (2011) | 5.34 in (2016) |
| September 17 | 91.9°F (2021) | 37.0°F (2014) | 0.45 in (2025) |
| September 18 | 99.0°F (2024) | 32.0°F (2012) | 0.50 in (2025) |
| September 19 | 95.0°F (2023) | 32.0°F (2012) | 2.45 in (2019) |
| September 20 | 93.0°F (2022) | 30.9°F (2006) | 0.40 in (2013) |
| September 21 | 102.0°F (2022) | 32.0°F (2006) | 2.37 in (2004) |
| September 22 | 98.1°F (2005) | 34.0°F (2012) | 2.00 in (2019) |
| September 23 | 93.0°F (2017) | 27.0°F (2012) | 1.14 in (2015) |
| September 24 | 90.0°F (2017) | 26.1°F (2012) | 1.97 in (2015) |
| September 25 | 89.1°F (2017) | 34.0°F (2021) | 2.79 in (2015) |
| September 26 | 91.0°F (2020) | 32.0°F (2003) | 0.83 in (2017) |
| September 27 | 91.9°F (2020) | 30.9°F (2012) | 0.15 in (2013) |
| September 28 | 91.9°F (2021) | 30.9°F (2012) | 0.48 in (2013) |
| September 29 | 93.0°F (2021) | 28.9°F (2003) | 1.30 in (2015) |
| September 30 | 97.0°F (2023) | 30.0°F (2003) | 1.50 in (2021) |