September weather in Maryland Heights, MO
The average temperature in Maryland Heights in September is 69.6°F (58.4°F–80.9°F). Average precipitation: 3.31 inches.
September is a fall month in Maryland Heights, and is warmer than the annual average of 56.3°F. Daily temperatures swing about 22.5°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 12h 14m. For travel, September is a comfortable month to visit.
Avg High
80.9°F
Avg Low
58.4°F
Precipitation
3.31 in
Daylight
12h 14m
September records in Maryland Heights
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.0°F (2011) | 48.9°F (1987) | 1.80 in (2012) |
| September 2 | 100.9°F (1984) | 46.9°F (1994) | 2.32 in (2014) |
| September 3 | 98.1°F (2011) | 51.1°F (1994) | 1.54 in (1993) |
| September 4 | 98.1°F (2011) | 48.9°F (1984) | 1.35 in (2008) |
| September 5 | 98.1°F (1990) | 48.0°F (1984) | 2.10 in (2008) |
| September 6 | 99.0°F (1990) | 43.0°F (1988) | 1.25 in (2009) |
| September 7 | 99.0°F (1990) | 45.0°F (1988) | 0.55 in (1980) |
| September 8 | 96.1°F (1980) | 41.0°F (1986) | 1.65 in (2018) |
| September 9 | 98.1°F (1980) | 43.0°F (1986) | 1.85 in (1984) |
| September 10 | 98.1°F (2013) | 46.9°F (1976) | 2.24 in (2016) |
| September 11 | 98.1°F (2013) | 44.1°F (1992) | 2.83 in (1984) |
| September 12 | 97.0°F (2013) | 45.0°F (1992) | 1.50 in (1986) |
| September 13 | 96.1°F (1980) | 42.1°F (1975) | 0.58 in (1977) |
| September 14 | 97.0°F (2025) | 39.0°F (1996) | 2.00 in (2008) |
| September 15 | 97.0°F (2025) | 42.1°F (1996) | 2.55 in (1993) |
| September 16 | 95.0°F (1991) | 42.1°F (1984) | 2.90 in (1978) |
| September 17 | 93.9°F (2019) | 42.1°F (1996) | 1.63 in (1980) |
| September 18 | 93.0°F (1983) | 42.1°F (1981) | 1.71 in (2006) |
| September 19 | 93.9°F (1983) | 35.1°F (1991) | 2.10 in (2010) |
| September 20 | 93.9°F (2000) | 33.1°F (1991) | 2.70 in (2002) |
| September 21 | 97.0°F (2022) | 33.1°F (1991) | 1.43 in (2021) |
| September 22 | 95.0°F (2022) | 32.0°F (1991) | 3.10 in (2024) |
| September 23 | 95.0°F (2017) | 28.9°F (1995) | 3.25 in (1993) |
| September 24 | 91.9°F (2016) | 32.0°F (1995) | 2.40 in (1996) |
| September 25 | 90.0°F (1986) | 32.0°F (1989) | 0.95 in (2000) |
| September 26 | 91.0°F (2016) | 35.1°F (1984) | 1.34 in (1977) |
| September 27 | 91.9°F (2017) | 36.0°F (1984) | 1.75 in (2003) |
| September 28 | 91.9°F (2019) | 35.1°F (1985) | 0.71 in (2024) |
| September 29 | 91.0°F (1986) | 37.9°F (1984) | 1.11 in (1987) |
| September 30 | 91.0°F (1979) | 33.1°F (1984) | 2.96 in (1986) |