September weather in Polo, IL
The average temperature in Polo in September is 64.0°F (51.2°F–76.8°F). Average precipitation: 3.59 inches.
September is a fall month in Polo, and is warmer than the annual average of 49.3°F. Daily temperatures swing about 25.6°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
76.8°F
Avg Low
51.2°F
Precipitation
3.59 in
Daylight
12h 16m
September records in Polo
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 96.1°F (2000) | 39.9°F (2009) | 0.29 in (2010) |
| September 2 | 93.0°F (1999) | 39.9°F (2017) | 0.36 in (2002) |
| September 3 | 93.9°F (2012) | 43.0°F (2005) | 0.85 in (2011) |
| September 4 | 93.9°F (2012) | 37.9°F (1997) | 1.57 in (2008) |
| September 5 | 91.9°F (2007) | 39.9°F (2003) | 0.79 in (2012) |
| September 6 | 93.0°F (1998) | 42.1°F (2000) | 0.43 in (2001) |
| September 7 | 91.0°F (2002) | 42.1°F (2011) | 1.34 in (2001) |
| September 8 | 91.0°F (2002) | 43.0°F (2010) | 0.82 in (2015) |
| September 9 | 97.0°F (2013) | 37.9°F (1995) | 1.61 in (2001) |
| September 10 | 96.1°F (2013) | 39.9°F (2008) | 1.62 in (2014) |
| September 11 | 91.0°F (2005) | 37.0°F (1995) | 1.19 in (2006) |
| September 12 | 90.0°F (1998) | 37.0°F (2007) | 1.39 in (2000) |
| September 13 | 90.0°F (1998) | 35.1°F (2014) | 2.09 in (2008) |
| September 14 | 87.1°F (2004) | 35.1°F (2013) | 2.19 in (1998) |
| September 15 | 88.0°F (2017) | 30.0°F (2007) | 1.22 in (2013) |
| September 16 | 87.1°F (2015) | 33.1°F (2007) | 0.26 in (1995) |
| September 17 | 88.0°F (2007) | 35.1°F (1999) | 1.90 in (1997) |
| September 18 | 90.0°F (2000) | 37.0°F (1999) | 2.03 in (2015) |
| September 19 | 93.9°F (2013) | 36.0°F (2012) | 1.57 in (2001) |
| September 20 | 91.9°F (2017) | 35.1°F (2003) | 0.76 in (2000) |
| September 21 | 90.0°F (2007) | 33.1°F (1995) | 0.83 in (2010) |
| September 22 | 91.9°F (2017) | 30.0°F (1999) | 1.97 in (2009) |
| September 23 | 93.0°F (2017) | 27.0°F (1995) | 0.86 in (2000) |
| September 24 | 91.0°F (2007) | 27.0°F (2012) | 0.69 in (2005) |
| September 25 | 91.9°F (2017) | 34.0°F (2001) | 0.80 in (2007) |
| September 26 | 90.0°F (1998) | 35.1°F (2006) | 1.82 in (2011) |
| September 27 | 84.9°F (2013) | 32.0°F (2012) | 1.55 in (1999) |
| September 28 | 84.9°F (2013) | 32.0°F (2012) | 2.44 in (1999) |
| September 29 | 88.0°F (2002) | 28.9°F (2003) | 0.48 in (2008) |
| September 30 | 87.1°F (2002) | 33.1°F (2003) | 0.82 in (1995) |