September weather in Galena, IL
The average temperature in Galena in September is 62.3°F (50.5°F–74.1°F). Average precipitation: 3.86 inches.
September is a fall month in Galena, and is warmer than the annual average of 47°F. Daily temperatures swing about 23.6°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 12h 16m. For travel, September is one of the best months of the year to visit.
Avg High
74.1°F
Avg Low
50.5°F
Precipitation
3.86 in
Daylight
12h 16m
September records in Galena
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 90.0°F (2012) | 39.9°F (1895) | 2.46 in (1989) |
| September 2 | 91.0°F (1899) | 44.1°F (1901) | 1.72 in (2002) |
| September 3 | 91.0°F (1901) | 46.0°F (2013) | 4.80 in (1973) |
| September 4 | 91.0°F (1901) | 45.0°F (1896) | 1.15 in (2011) |
| September 5 | 93.9°F (1899) | 46.0°F (2021) | 2.69 in (1965) |
| September 6 | 93.0°F (1901) | 42.1°F (1896) | 1.06 in (1938) |
| September 7 | 90.0°F (1897) | 42.1°F (1896) | 1.89 in (1938) |
| September 8 | 93.0°F (1897) | 43.0°F (2017) | 3.50 in (1941) |
| September 9 | 93.0°F (1897) | 45.0°F (1899) | 4.74 in (1927) |
| September 10 | 97.0°F (1895) | 45.0°F (2018) | 2.78 in (1986) |
| September 11 | 96.1°F (1895) | 34.0°F (1898) | 2.05 in (2006) |
| September 12 | 88.0°F (1897) | 37.0°F (1898) | 1.28 in (1961) |
| September 13 | 91.0°F (1897) | 37.9°F (2014) | 4.30 in (1961) |
| September 14 | 91.9°F (1897) | 37.0°F (2014) | 2.84 in (1967) |
| September 15 | 87.1°F (1895) | 39.9°F (2014) | 1.78 in (1998) |
| September 16 | 87.1°F (1899) | 36.0°F (2014) | 2.02 in (1927) |
| September 17 | 88.0°F (1895) | 35.1°F (1903) | 1.20 in (1938) |
| September 18 | 89.1°F (2018) | 33.1°F (1901) | 3.42 in (1978) |
| September 19 | 91.0°F (1895) | 33.1°F (1901) | 2.41 in (2001) |
| September 20 | 91.9°F (1895) | 28.0°F (1896) | 2.36 in (1965) |
| September 21 | 91.0°F (1895) | 30.9°F (1897) | 3.64 in (1986) |
| September 22 | 90.0°F (1895) | 34.0°F (1896) | 0.96 in (1898) |
| September 23 | 90.0°F (2017) | 32.0°F (1896) | 1.53 in (1946) |
| September 24 | 91.0°F (2017) | 32.0°F (1903) | 1.70 in (1977) |
| September 25 | 88.0°F (2017) | 32.0°F (2012) | 2.79 in (1986) |
| September 26 | 89.1°F (2017) | 30.0°F (1899) | 1.50 in (1993) |
| September 27 | 84.0°F (1901) | 28.9°F (1899) | 0.84 in (2011) |
| September 28 | 84.9°F (1901) | 28.0°F (1896) | 1.66 in (1945) |
| September 29 | 84.9°F (1897) | 28.0°F (1899) | 1.70 in (1973) |
| September 30 | 86.0°F (1897) | 15.1°F (1899) | 1.26 in (1941) |