September weather in Polk City, IA
The average temperature in Polk City in September is 65.6°F (55.1°F–76.2°F). Average precipitation: 3.40 inches.
September is a fall month in Polk City, and is warmer than the annual average of 50.3°F. Daily temperatures swing about 21.1°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 16m. For travel, September is one of the best months of the year to visit.
Avg High
76.2°F
Avg Low
55.1°F
Precipitation
3.40 in
Daylight
12h 16m
September records in Polk City
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 95.0°F (2011) | 50.0°F (2005) | 1.85 in (2018) |
| September 2 | 99.0°F (2000) | 51.1°F (2024) | 0.77 in (2015) |
| September 3 | 96.1°F (2000) | 51.1°F (2010) | 2.81 in (2018) |
| September 4 | 95.0°F (2012) | 44.1°F (2025) | 0.50 in (2018) |
| September 5 | 91.9°F (2023) | 46.0°F (2008) | 1.42 in (2004) |
| September 6 | 93.9°F (2002) | 42.1°F (2025) | 2.33 in (2007) |
| September 7 | 96.1°F (2002) | 43.0°F (2025) | 1.65 in (2001) |
| September 8 | 95.0°F (2002) | 44.1°F (2012) | 1.03 in (2005) |
| September 9 | 100.9°F (2013) | 41.0°F (2008) | 2.15 in (2014) |
| September 10 | 97.0°F (2013) | 46.9°F (1999) | 2.04 in (2006) |
| September 11 | 99.0°F (2000) | 46.0°F (1997) | 1.07 in (2008) |
| September 12 | 91.9°F (1998) | 39.0°F (2014) | 1.18 in (2008) |
| September 13 | 93.9°F (2025) | 36.0°F (2014) | 0.76 in (2005) |
| September 14 | 91.9°F (2017) | 36.0°F (1996) | 0.21 in (2019) |
| September 15 | 93.0°F (2017) | 37.0°F (1996) | 1.25 in (2016) |
| September 16 | 87.1°F (2018) | 39.9°F (2014) | 0.88 in (2017) |
| September 17 | 93.0°F (2000) | 44.1°F (1999) | 2.02 in (2015) |
| September 18 | 91.0°F (2000) | 37.0°F (2012) | 1.34 in (2010) |
| September 19 | 89.1°F (1998) | 36.0°F (2003) | 1.26 in (2013) |
| September 20 | 93.9°F (2022) | 35.1°F (2006) | 0.51 in (2018) |
| September 21 | 91.9°F (2005) | 30.9°F (1999) | 1.04 in (2010) |
| September 22 | 91.9°F (2017) | 39.0°F (2012) | 0.95 in (1997) |
| September 23 | 91.0°F (2017) | 30.9°F (2012) | 1.23 in (2015) |
| September 24 | 90.0°F (2017) | 36.0°F (2002) | 0.75 in (2014) |
| September 25 | 87.1°F (1998) | 34.0°F (2003) | 3.64 in (2017) |
| September 26 | 89.1°F (1998) | 37.9°F (2001) | 0.79 in (1999) |
| September 27 | 93.0°F (2021) | 42.1°F (2001) | 0.61 in (1999) |
| September 28 | 84.9°F (2021) | 35.1°F (2003) | 0.28 in (2005) |
| September 29 | 91.0°F (2002) | 30.0°F (2003) | 0.59 in (2008) |
| September 30 | 91.9°F (2023) | 32.0°F (2003) | 0.82 in (2021) |