September weather in Marietta, NC
The average temperature in Marietta in September is 72.6°F (62.2°F–83.0°F). Average precipitation: 6.42 inches.
September is a fall month in Marietta, and is warmer than the annual average of 61.6°F. Daily temperatures swing about 20.8°F between overnight low and afternoon high. Daylight averages about 12h 12m. For travel, September is a wet month.
Avg High
83.0°F
Avg Low
62.2°F
Precipitation
6.42 in
Daylight
12h 12m
September records in Marietta
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 93.9°F (2010) | 54.0°F (2025) | 0.55 in (2020) |
| September 2 | 93.9°F (2010) | 54.0°F (2025) | 1.01 in (2016) |
| September 3 | 93.9°F (2014) | 53.1°F (2021) | 5.25 in (2016) |
| September 4 | 96.1°F (2010) | 55.9°F (2023) | 0.00 in (2007) |
| September 5 | 93.0°F (2020) | 55.0°F (2010) | 1.23 in (2015) |
| September 6 | 93.0°F (2023) | 57.0°F (2016) | 3.90 in (2008) |
| September 7 | 93.9°F (2023) | 57.9°F (2017) | 1.70 in (2012) |
| September 8 | 91.9°F (2016) | 52.0°F (2017) | 0.95 in (2014) |
| September 9 | 93.0°F (2010) | 52.0°F (2017) | 1.10 in (2014) |
| September 10 | 93.9°F (2007) | 52.0°F (2017) | 0.50 in (2021) |
| September 11 | 93.9°F (2007) | 53.1°F (2012) | 0.40 in (2008) |
| September 12 | 93.0°F (2007) | 52.0°F (2012) | 3.10 in (2017) |
| September 13 | 91.9°F (2018) | 54.0°F (2012) | 1.14 in (2008) |
| September 14 | 91.9°F (2019) | 48.0°F (2015) | 0.53 in (2014) |
| September 15 | 90.0°F (2010) | 46.9°F (2015) | 0.26 in (2007) |
| September 16 | 91.9°F (2010) | 50.0°F (2023) | 6.74 in (2018) |
| September 17 | 91.9°F (2010) | 48.9°F (2023) | 2.40 in (2024) |
| September 18 | 90.0°F (2010) | 50.0°F (2013) | 3.75 in (2020) |
| September 19 | 89.1°F (2016) | 51.1°F (2013) | 0.75 in (2012) |
| September 20 | 90.0°F (2025) | 51.1°F (2013) | 1.77 in (2016) |
| September 21 | 91.0°F (2022) | 52.0°F (2019) | 0.41 in (2007) |
| September 22 | 89.1°F (2017) | 46.0°F (2020) | 0.90 in (2021) |
| September 23 | 90.0°F (2025) | 54.0°F (2013) | 1.10 in (2021) |
| September 24 | 93.0°F (2007) | 46.9°F (2020) | 0.94 in (2011) |
| September 25 | 91.0°F (2025) | 46.0°F (2012) | 0.15 in (2014) |
| September 26 | 91.9°F (2025) | 43.0°F (2022) | 4.50 in (2020) |
| September 27 | 89.1°F (2018) | 51.1°F (2021) | 2.22 in (2025) |
| September 28 | 91.0°F (2017) | 50.0°F (2022) | 2.03 in (2010) |
| September 29 | 91.9°F (2017) | 48.0°F (2009) | 0.52 in (2016) |
| September 30 | 93.9°F (2019) | 45.0°F (2009) | 3.15 in (2010) |