September weather in Green Valley, IL
The average temperature in Green Valley in September is °F (°F–°F). Average precipitation: 3.39 inches.
September is a fall month in Green Valley, 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
3.39 in
Daylight
12h 15m
September records in Green Valley
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 88.0°F (1942) | 52.0°F (1944) | 1.91 in (2012) |
| September 2 | 93.9°F (1942) | 60.1°F (1943) | 1.25 in (2012) |
| September 3 | 93.0°F (1944) | 61.0°F (1943) | 2.10 in (1993) |
| September 4 | 89.1°F (1944) | 57.9°F (1942) | 1.84 in (1977) |
| September 5 | 91.9°F (1943) | 57.0°F (1942) | 2.60 in (2008) |
| September 6 | 82.0°F (1943) | 60.1°F (1944) | 2.60 in (1993) |
| September 7 | 82.0°F (1942) | 43.0°F (1944) | 0.72 in (1972) |
| September 8 | 82.0°F (1944) | 46.9°F (1944) | 1.91 in (2016) |
| September 9 | 82.9°F (1942) | 43.0°F (1943) | 2.70 in (1989) |
| September 10 | 84.0°F (1942) | 41.0°F (1943) | 2.20 in (2014) |
| September 11 | 91.9°F (1942) | 50.0°F (1943) | 1.70 in (1986) |
| September 12 | 82.9°F (1942) | 53.1°F (1943) | 1.25 in (1961) |
| September 13 | 84.9°F (1942) | 51.1°F (1944) | 2.15 in (1970) |
| September 14 | 93.0°F (1942) | 48.9°F (1944) | 5.00 in (1993) |
| September 15 | 90.0°F (1942) | 46.9°F (1944) | 3.52 in (2004) |
| September 16 | 89.1°F (1942) | 44.1°F (1943) | 2.12 in (1965) |
| September 17 | 84.9°F (1944) | 39.9°F (1943) | 1.50 in (1980) |
| September 18 | 93.0°F (1942) | 42.1°F (1943) | 1.36 in (1968) |
| September 19 | 88.0°F (1944) | 46.9°F (1943) | 3.25 in (1975) |
| September 20 | 88.0°F (1944) | 50.0°F (1943) | 6.00 in (1986) |
| September 21 | 82.9°F (1944) | 36.0°F (1943) | 3.09 in (1950) |
| September 22 | 84.0°F (1943) | 41.0°F (1942) | 2.43 in (1970) |
| September 23 | 70.0°F (1943) | 45.0°F (1942) | 1.13 in (1969) |
| September 24 | 69.1°F (1944) | 34.0°F (1942) | 2.19 in (1961) |
| September 25 | 75.9°F (1944) | 33.1°F (1942) | 2.83 in (1941) |
| September 26 | 80.1°F (1944) | 34.0°F (1942) | 1.96 in (1959) |
| September 27 | 82.0°F (1943) | 32.0°F (1942) | 1.25 in (2009) |
| September 28 | 82.0°F (1943) | 28.0°F (1942) | 1.10 in (1945) |
| September 29 | 82.0°F (1943) | 33.1°F (1942) | 1.15 in (1986) |
| September 30 | 84.0°F (1943) | 45.0°F (1942) | 0.66 in (1951) |