September weather in Galesburg, IL
The average temperature in Galesburg in September is 65.5°F (54.7°F–76.2°F). Average precipitation: 3.85 inches.
September is a fall month in Galesburg, and is warmer than the annual average of 50.2°F. Daily temperatures swing about 21.5°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 12h 15m. For travel, September is one of the best months of the year to visit.
Avg High
76.2°F
Avg Low
54.7°F
Precipitation
3.85 in
Daylight
12h 15m
September records in Galesburg
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 99.0°F (1953) | 43.0°F (1909) | 3.06 in (1980) |
| September 2 | 99.0°F (2011) | 43.0°F (1901) | 2.34 in (2012) |
| September 3 | 96.1°F (1900) | 42.1°F (1908) | 2.75 in (1997) |
| September 4 | 93.9°F (1899) | 39.0°F (1974) | 3.78 in (2014) |
| September 5 | 100.0°F (1899) | 39.9°F (1902) | 1.88 in (1941) |
| September 6 | 99.0°F (1899) | 43.0°F (1988) | 1.54 in (2018) |
| September 7 | 99.0°F (1939) | 39.0°F (1986) | 3.48 in (2018) |
| September 8 | 93.9°F (1971) | 41.0°F (1986) | 7.70 in (1927) |
| September 9 | 96.1°F (1897) | 42.1°F (2008) | 1.62 in (1976) |
| September 10 | 96.1°F (2013) | 41.0°F (1902) | 2.98 in (2014) |
| September 11 | 93.9°F (2000) | 39.0°F (1940) | 1.25 in (2022) |
| September 12 | 95.0°F (1897) | 37.9°F (1902) | 2.40 in (2020) |
| September 13 | 97.0°F (1897) | 34.0°F (1902) | 4.90 in (1961) |
| September 14 | 97.0°F (1939) | 35.1°F (1902) | 2.27 in (2008) |
| September 15 | 98.1°F (1939) | 37.0°F (1904) | 2.01 in (2004) |
| September 16 | 90.0°F (1907) | 26.1°F (1999) | 1.20 in (1897) |
| September 17 | 96.1°F (1907) | 34.0°F (1900) | 1.52 in (1968) |
| September 18 | 93.0°F (1972) | 33.1°F (1901) | 1.22 in (2001) |
| September 19 | 93.0°F (1948) | 30.0°F (1901) | 2.83 in (1983) |
| September 20 | 91.0°F (1940) | 32.0°F (1991) | 1.63 in (1904) |
| September 21 | 93.9°F (2022) | 30.9°F (1901) | 3.85 in (1947) |
| September 22 | 91.9°F (1988) | 33.1°F (1974) | 1.95 in (2019) |
| September 23 | 91.9°F (2017) | 33.1°F (1983) | 2.45 in (1961) |
| September 24 | 91.9°F (2017) | 33.1°F (1942) | 1.25 in (2005) |
| September 25 | 90.0°F (2007) | 33.1°F (1942) | 2.20 in (1986) |
| September 26 | 91.9°F (1897) | 32.0°F (1984) | 1.85 in (1933) |
| September 27 | 89.1°F (2017) | 32.0°F (1899) | 1.91 in (1936) |
| September 28 | 93.0°F (1953) | 27.0°F (1942) | 4.30 in (2019) |
| September 29 | 97.0°F (1953) | 27.0°F (1899) | 3.23 in (1906) |
| September 30 | 90.0°F (1952) | 19.0°F (1899) | 2.20 in (1986) |