September weather in Galena, MO
The average temperature in Galena in September is 68.8°F (55.9°F–81.7°F). Average precipitation: 4.28 inches.
September is a fall month in Galena, and is warmer than the annual average of 56.2°F. Daily temperatures swing about 25.8°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 13m. For travel, September is a comfortable month to visit.
Avg High
81.7°F
Avg Low
55.9°F
Precipitation
4.28 in
Daylight
12h 13m
September records in Galena
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 105.1°F (2000) | 46.9°F (2009) | 2.00 in (2014) |
| September 2 | 102.0°F (2000) | 46.9°F (2009) | 2.05 in (2010) |
| September 3 | 102.9°F (2000) | 44.1°F (1974) | 1.31 in (2010) |
| September 4 | 102.9°F (2000) | 39.9°F (1974) | 2.94 in (2008) |
| September 5 | 102.9°F (1998) | 42.1°F (1974) | 1.50 in (1965) |
| September 6 | 102.0°F (1998) | 42.1°F (1988) | 1.40 in (1951) |
| September 7 | 99.0°F (1990) | 42.1°F (1988) | 1.45 in (1963) |
| September 8 | 100.9°F (1998) | 43.0°F (2024) | 2.17 in (1972) |
| September 9 | 93.9°F (1980) | 39.9°F (2024) | 2.90 in (2001) |
| September 10 | 95.0°F (2013) | 42.1°F (2024) | 1.72 in (1989) |
| September 11 | 95.0°F (2000) | 41.0°F (1992) | 2.70 in (1985) |
| September 12 | 97.0°F (2000) | 41.0°F (1992) | 1.68 in (1947) |
| September 13 | 95.0°F (1980) | 44.1°F (1996) | 1.35 in (2003) |
| September 14 | 100.9°F (2011) | 41.0°F (1964) | 4.50 in (2008) |
| September 15 | 93.9°F (2000) | 39.0°F (1993) | 2.07 in (1930) |
| September 16 | 96.1°F (1980) | 39.0°F (1979) | 2.00 in (1988) |
| September 17 | 95.0°F (2025) | 39.0°F (1993) | 1.50 in (1995) |
| September 18 | 95.0°F (2025) | 34.0°F (1981) | 1.25 in (2014) |
| September 19 | 93.9°F (2019) | 37.0°F (1991) | 1.76 in (1988) |
| September 20 | 95.0°F (2005) | 33.1°F (1991) | 2.00 in (1924) |
| September 21 | 96.1°F (2024) | 33.1°F (1983) | 2.44 in (1992) |
| September 22 | 95.0°F (2005) | 33.1°F (1995) | 2.30 in (1970) |
| September 23 | 95.0°F (2005) | 28.0°F (1995) | 3.61 in (1936) |
| September 24 | 93.0°F (2017) | 28.9°F (1995) | 2.81 in (1997) |
| September 25 | 90.0°F (2016) | 32.0°F (1989) | 4.00 in (1993) |
| September 26 | 90.0°F (2017) | 34.0°F (1975) | 1.85 in (1996) |
| September 27 | 89.1°F (1998) | 34.0°F (1975) | 2.10 in (1996) |
| September 28 | 90.0°F (1998) | 36.0°F (1989) | 1.25 in (1944) |
| September 29 | 90.0°F (1963) | 30.9°F (1992) | 1.49 in (1954) |
| September 30 | 91.0°F (1969) | 30.0°F (1984) | 3.15 in (1986) |