September weather in Chain of Rocks, MO
The average temperature in Chain of Rocks in September is 68.9°F (57.1°F–80.8°F). Average precipitation: 3.07 inches.
September is a fall month in Chain of Rocks, and is warmer than the annual average of 55.3°F. Daily temperatures swing about 23.7°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 12h 14m. For travel, September is a comfortable month to visit.
Avg High
80.8°F
Avg Low
57.1°F
Precipitation
3.07 in
Daylight
12h 14m
September records in Chain of Rocks
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.9°F (2011) | 48.0°F (2009) | 1.80 in (2012) |
| September 2 | 102.0°F (1984) | 48.0°F (2009) | 1.79 in (2003) |
| September 3 | 100.0°F (2011) | 50.0°F (2009) | 1.52 in (1993) |
| September 4 | 99.0°F (2011) | 51.1°F (2010) | 0.78 in (2008) |
| September 5 | 98.1°F (1990) | 51.1°F (2010) | 2.35 in (2008) |
| September 6 | 100.0°F (1990) | 46.0°F (1988) | 0.82 in (2014) |
| September 7 | 100.0°F (1990) | 46.9°F (1988) | 0.61 in (2001) |
| September 8 | 95.0°F (1980) | 42.1°F (1986) | 0.72 in (2007) |
| September 9 | 98.1°F (1980) | 43.0°F (1986) | 2.75 in (1984) |
| September 10 | 98.1°F (2013) | 50.0°F (2012) | 1.43 in (2014) |
| September 11 | 98.1°F (2013) | 48.0°F (1980) | 2.53 in (1984) |
| September 12 | 97.0°F (2013) | 50.0°F (1980) | 0.93 in (2000) |
| September 13 | 97.0°F (1980) | 41.0°F (2014) | 0.75 in (1989) |
| September 14 | 93.9°F (1984) | 44.1°F (2015) | 2.25 in (2008) |
| September 15 | 95.0°F (1991) | 43.0°F (2011) | 2.56 in (2008) |
| September 16 | 95.0°F (1991) | 42.1°F (2011) | 0.97 in (2005) |
| September 17 | 91.0°F (1983) | 44.1°F (1981) | 1.60 in (1980) |
| September 18 | 95.0°F (1983) | 37.9°F (1981) | 1.00 in (1982) |
| September 19 | 91.9°F (1983) | 39.0°F (1991) | 1.47 in (2010) |
| September 20 | 91.9°F (2005) | 39.0°F (1991) | 3.13 in (2002) |
| September 21 | 91.9°F (1980) | 37.9°F (1991) | 1.09 in (2021) |
| September 22 | 91.0°F (1980) | 39.0°F (1983) | 1.42 in (2024) |
| September 23 | 93.0°F (2005) | 36.0°F (1983) | 2.33 in (1993) |
| September 24 | 90.0°F (2010) | 35.1°F (1983) | 1.52 in (1986) |
| September 25 | 90.0°F (1986) | 35.1°F (1989) | 0.92 in (2000) |
| September 26 | 89.1°F (1986) | 39.0°F (1980) | 1.43 in (2012) |
| September 27 | 88.0°F (1981) | 39.0°F (1984) | 1.71 in (2003) |
| September 28 | 89.1°F (1986) | 39.9°F (1984) | 0.72 in (2024) |
| September 29 | 91.0°F (1986) | 39.9°F (1992) | 1.00 in (1987) |
| September 30 | 88.0°F (1981) | 35.1°F (1984) | 1.76 in (1986) |