September weather in St. George, SC
The average temperature in St. George in September is 74.7°F (64.6°F–84.8°F). Average precipitation: 5.09 inches.
September is a fall month in St. George, and is warmer than the annual average of 63.9°F. Daily temperatures swing about 20.2°F between overnight low and afternoon high. Daylight averages about 12h 12m. For travel, September is a wet month.
Avg High
84.8°F
Avg Low
64.6°F
Precipitation
5.09 in
Daylight
12h 12m
September records in St. George
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 95.0°F (2018) | 62.1°F (2025) | 0.13 in (2017) |
| September 2 | 95.0°F (2018) | 62.1°F (2011) | 0.85 in (2014) |
| September 3 | 95.0°F (2020) | 57.0°F (2025) | 5.13 in (2016) |
| September 4 | 93.9°F (2020) | 55.9°F (2021) | 0.35 in (2022) |
| September 5 | 96.1°F (2020) | 55.9°F (2021) | 0.60 in (2013) |
| September 6 | 91.9°F (2025) | 60.1°F (2016) | 1.40 in (2019) |
| September 7 | 93.9°F (2019) | 57.0°F (2011) | 1.23 in (2017) |
| September 8 | 96.1°F (2019) | 55.9°F (2011) | 0.60 in (2025) |
| September 9 | 96.1°F (2019) | 55.9°F (2017) | 0.67 in (2015) |
| September 10 | 93.9°F (2019) | 55.9°F (2024) | 0.65 in (2022) |
| September 11 | 93.9°F (2019) | 55.9°F (2024) | 1.21 in (2023) |
| September 12 | 93.9°F (2019) | 57.9°F (2009) | 6.75 in (2017) |
| September 13 | 91.9°F (2011) | 59.0°F (2017) | 1.12 in (2016) |
| September 14 | 90.0°F (2009) | 55.0°F (2015) | 0.35 in (2014) |
| September 15 | 91.9°F (2011) | 52.0°F (2015) | 1.04 in (2018) |
| September 16 | 95.0°F (2011) | 52.0°F (2015) | 0.93 in (2018) |
| September 17 | 91.9°F (2019) | 57.0°F (2011) | 0.42 in (2020) |
| September 18 | 93.0°F (2019) | 57.0°F (2011) | 2.69 in (2020) |
| September 19 | 91.0°F (2010) | 55.9°F (2013) | 0.50 in (2019) |
| September 20 | 91.0°F (2010) | 55.9°F (2013) | 0.20 in (2014) |
| September 21 | 95.0°F (2010) | 55.9°F (2020) | 0.78 in (2021) |
| September 22 | 93.0°F (2010) | 52.0°F (2020) | 2.42 in (2021) |
| September 23 | 95.0°F (2022) | 50.0°F (2020) | 0.83 in (2011) |
| September 24 | 95.0°F (2022) | 48.9°F (2022) | 1.94 in (2011) |
| September 25 | 93.0°F (2025) | 48.9°F (2022) | 1.67 in (2011) |
| September 26 | 93.0°F (2019) | 51.1°F (2021) | 2.12 in (2020) |
| September 27 | 95.0°F (2019) | 55.9°F (2022) | 2.95 in (2010) |
| September 28 | 95.0°F (2019) | 57.0°F (2021) | 0.82 in (2010) |
| September 29 | 93.9°F (2017) | 53.1°F (2009) | 0.70 in (2020) |
| September 30 | 93.9°F (2019) | 48.0°F (2009) | 1.75 in (2020) |