September weather in Indianola, IL
The average temperature in Indianola in September is 66.1°F (54.0°F–78.1°F). Average precipitation: 2.73 inches.
September is a fall month in Indianola, and is warmer than the annual average of 51.5°F. Daily temperatures swing about 24.1°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 15m. For travel, September is one of the best months of the year to visit.
Avg High
78.1°F
Avg Low
54.0°F
Precipitation
2.73 in
Daylight
12h 15m
September records in Indianola
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 93.0°F (2011) | 45.0°F (2009) | 3.33 in (2003) |
| September 2 | 99.0°F (2011) | 45.0°F (2017) | 2.65 in (2015) |
| September 3 | 99.0°F (2011) | 46.9°F (2017) | 1.86 in (1993) |
| September 4 | 96.1°F (2011) | 50.0°F (2010) | 3.21 in (1918) |
| September 5 | 96.1°F (2007) | 46.0°F (2003) | 1.20 in (2008) |
| September 6 | 93.9°F (2018) | 42.1°F (2011) | 0.50 in (1948) |
| September 7 | 91.9°F (2015) | 43.0°F (2011) | 1.24 in (1917) |
| September 8 | 93.9°F (2002) | 42.1°F (2025) | 3.90 in (1972) |
| September 9 | 91.9°F (2002) | 41.0°F (2008) | 3.37 in (1989) |
| September 10 | 90.0°F (2002) | 44.1°F (2017) | 0.79 in (2016) |
| September 11 | 91.9°F (2005) | 46.9°F (2008) | 0.60 in (2000) |
| September 12 | 91.0°F (2005) | 43.0°F (2007) | 1.70 in (2000) |
| September 13 | 91.0°F (2005) | 43.0°F (2007) | 1.23 in (1949) |
| September 14 | 93.9°F (2005) | 44.1°F (2015) | 2.11 in (1973) |
| September 15 | 90.0°F (2002) | 36.0°F (2007) | 2.82 in (1966) |
| September 16 | 91.0°F (2025) | 36.0°F (2007) | 0.88 in (1913) |
| September 17 | 90.0°F (2018) | 46.0°F (2010) | 1.35 in (1980) |
| September 18 | 91.9°F (2018) | 46.9°F (2009) | 1.27 in (1967) |
| September 19 | 93.0°F (2018) | 39.0°F (2012) | 1.69 in (1966) |
| September 20 | 93.9°F (2005) | 37.9°F (2006) | 2.53 in (1966) |
| September 21 | 93.0°F (2018) | 37.9°F (2006) | 2.70 in (1948) |
| September 22 | 95.0°F (2010) | 42.1°F (2012) | 1.17 in (1965) |
| September 23 | 95.0°F (2005) | 36.0°F (2012) | 1.30 in (1970) |
| September 24 | 91.9°F (2010) | 35.1°F (2012) | 1.57 in (1994) |
| September 25 | 91.9°F (2017) | 35.1°F (2012) | 2.43 in (1961) |
| September 26 | 91.0°F (2017) | 42.1°F (2003) | 1.08 in (2005) |
| September 27 | 91.0°F (2017) | 36.0°F (2022) | 1.72 in (1959) |
| September 28 | 88.0°F (2021) | 34.0°F (2022) | 1.06 in (1955) |
| September 29 | 91.0°F (2025) | 34.0°F (2003) | 2.15 in (1987) |
| September 30 | 91.9°F (2025) | 34.0°F (2003) | 1.88 in (1955) |