September weather in Tonica, IL
The average temperature in Tonica in September is °F (°F–°F). Average precipitation: 3.20 inches.
September is a fall month in Tonica, and is cooler than the annual average of 0°F. Expect about 7 days with precipitation. Daylight averages about 12h 16m.
Avg High
°F
Avg Low
°F
Precipitation
3.20 in
Daylight
12h 16m
September records in Tonica
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 93.9°F (2000) | 53.1°F (1999) | 2.93 in (1977) |
| September 2 | 95.0°F (2000) | 50.0°F (2001) | 0.66 in (1952) |
| September 3 | 93.0°F (1999) | 48.9°F (2001) | 0.66 in (1993) |
| September 4 | 89.1°F (1998) | 44.1°F (1997) | 1.29 in (1991) |
| September 5 | 91.9°F (1999) | 44.1°F (1997) | 1.95 in (1943) |
| September 6 | 91.9°F (1998) | 46.9°F (2000) | 1.09 in (1989) |
| September 7 | 95.0°F (1998) | 46.0°F (2000) | 2.85 in (1989) |
| September 8 | 91.9°F (2002) | 50.0°F (1999) | 0.66 in (1987) |
| September 9 | 93.0°F (2002) | 48.9°F (1998) | 2.01 in (1948) |
| September 10 | 91.0°F (2002) | 44.1°F (2001) | 3.42 in (1992) |
| September 11 | 90.0°F (2002) | 46.9°F (1999) | 0.30 in (1964) |
| September 12 | 95.0°F (2000) | 46.0°F (1999) | 4.02 in (1961) |
| September 13 | 90.0°F (1998) | 48.0°F (2002) | 1.94 in (1970) |
| September 14 | 93.0°F (1998) | 46.9°F (1999) | 2.75 in (1961) |
| September 15 | 86.0°F (2004) | 44.1°F (1999) | 1.72 in (1970) |
| September 16 | 82.0°F (1997) | 43.0°F (2000) | 0.62 in (2004) |
| September 17 | 86.0°F (1997) | 42.1°F (2000) | 3.62 in (1987) |
| September 18 | 82.9°F (1997) | 46.0°F (1999) | 3.26 in (1978) |
| September 19 | 88.0°F (2000) | 45.0°F (1999) | 1.68 in (2001) |
| September 20 | 88.0°F (1998) | 43.0°F (2003) | 2.03 in (1986) |
| September 21 | 82.9°F (1998) | 43.0°F (1999) | 1.11 in (1992) |
| September 22 | 82.9°F (2004) | 39.0°F (1999) | 1.40 in (1947) |
| September 23 | 84.0°F (2004) | 39.0°F (1999) | 1.09 in (1961) |
| September 24 | 84.9°F (2004) | 42.1°F (2002) | 2.25 in (1961) |
| September 25 | 80.1°F (2004) | 39.9°F (2002) | 0.81 in (1961) |
| September 26 | 86.0°F (1999) | 39.0°F (2000) | 1.46 in (1993) |
| September 27 | 91.0°F (1998) | 39.0°F (2000) | 1.70 in (1964) |
| September 28 | 87.1°F (1998) | 44.1°F (2004) | 2.56 in (1999) |
| September 29 | 82.0°F (1998) | 37.9°F (2003) | 1.22 in (1945) |
| September 30 | 89.1°F (2002) | 37.0°F (2003) | 2.09 in (1979) |