September weather in Plymouth, IL
The average temperature in Plymouth in September is °F (°F–°F). Average precipitation: 3.55 inches.
September is a fall month in Plymouth, and is cooler than the annual average of 0°F. Expect about 7 days with precipitation. Daylight averages about 12h 15m.
Avg High
°F
Avg Low
°F
Precipitation
3.55 in
Daylight
12h 15m
September records in Plymouth
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | — | — | 2.68 in (2003) |
| September 2 | — | — | 1.01 in (2020) |
| September 3 | — | — | 0.38 in (2010) |
| September 4 | — | — | 1.13 in (2008) |
| September 5 | — | — | 1.25 in (2008) |
| September 6 | — | — | 1.82 in (2018) |
| September 7 | — | — | 1.38 in (2018) |
| September 8 | — | — | 1.92 in (2018) |
| September 9 | — | — | 1.17 in (1951) |
| September 10 | — | — | 4.43 in (2014) |
| September 11 | — | — | 1.37 in (2010) |
| September 12 | — | — | 1.59 in (2020) |
| September 13 | — | — | 0.62 in (2008) |
| September 14 | — | — | 2.40 in (2008) |
| September 15 | — | — | 0.71 in (1998) |
| September 16 | — | — | 2.00 in (2004) |
| September 17 | — | — | 0.48 in (2016) |
| September 18 | — | — | 2.07 in (2022) |
| September 19 | — | — | 2.80 in (2022) |
| September 20 | — | — | 1.43 in (2013) |
| September 21 | — | — | 0.93 in (2021) |
| September 22 | — | — | 0.92 in (2019) |
| September 23 | — | — | 0.99 in (2019) |
| September 24 | — | — | 0.59 in (2010) |
| September 25 | — | — | 0.36 in (2009) |
| September 26 | — | — | 1.04 in (1996) |
| September 27 | — | — | 0.30 in (2003) |
| September 28 | — | — | 2.76 in (2019) |
| September 29 | — | — | 0.95 in (2005) |
| September 30 | — | — | 0.53 in (1998) |