August weather in St. Marys, GA
The average temperature in St. Marys in August is 81.1°F (73.7°F–88.5°F). Average precipitation: 6.53 inches.
August is a summer month in St. Marys, and is warmer than the annual average of 67.8°F. Daily temperatures swing about 14.8°F between overnight low and afternoon high. Expect about 14 days with precipitation. Daylight averages about 13h 7m. For travel, August is a wet month.
Avg High
88.5°F
Avg Low
73.7°F
Precipitation
6.53 in
Daylight
13h 7m
August records in St. Marys
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 98.8°F (2025) | 70.5°F (2019) | 1.78 in (2019) |
| August 2 | 95.9°F (2022) | 71.2°F (2018) | 3.20 in (2025) |
| August 3 | 97.0°F (2006) | 69.1°F (2011) | 1.94 in (2007) |
| August 4 | 97.9°F (2006) | 71.8°F (2009) | 4.06 in (2025) |
| August 5 | 94.3°F (2007) | 70.0°F (2009) | 4.38 in (2024) |
| August 6 | 96.4°F (2008) | 70.0°F (2009) | 1.09 in (2024) |
| August 7 | 96.8°F (2011) | 70.0°F (2018) | 3.05 in (2010) |
| August 8 | 97.0°F (2011) | 70.5°F (2008) | 1.44 in (2008) |
| August 9 | 97.3°F (2011) | 67.8°F (2008) | 0.72 in (2012) |
| August 10 | 98.6°F (2006) | 69.4°F (2009) | 0.63 in (2020) |
| August 11 | 98.4°F (2011) | 71.1°F (2015) | 1.78 in (2023) |
| August 12 | 95.0°F (2006) | 71.6°F (2020) | 1.70 in (2022) |
| August 13 | 94.5°F (2013) | 71.6°F (2012) | 1.57 in (2012) |
| August 14 | 95.0°F (2019) | 66.9°F (2022) | 0.67 in (2005) |
| August 15 | 95.2°F (2011) | 63.7°F (2022) | 1.10 in (2019) |
| August 16 | 94.6°F (2017) | 68.4°F (2024) | 1.08 in (2013) |
| August 17 | 92.5°F (2017) | 67.3°F (2024) | 1.47 in (2022) |
| August 18 | 93.2°F (2024) | 68.5°F (2022) | 1.35 in (2022) |
| August 19 | 94.8°F (2010) | 70.0°F (2020) | 2.44 in (2020) |
| August 20 | 95.0°F (2021) | 69.3°F (2020) | 2.12 in (2012) |
| August 21 | 96.1°F (2016) | 70.2°F (2012) | 2.13 in (2008) |
| August 22 | 96.6°F (2011) | 70.9°F (2012) | 2.21 in (2008) |
| August 23 | 95.9°F (2014) | 68.9°F (2012) | 0.85 in (2021) |
| August 24 | 91.2°F (2010) | 67.3°F (2009) | 0.83 in (2024) |
| August 25 | 93.9°F (2015) | 68.4°F (2012) | 0.98 in (2015) |
| August 26 | 93.4°F (2011) | 69.6°F (2025) | 1.33 in (2005) |
| August 27 | 99.3°F (2011) | 66.9°F (2014) | 2.15 in (2009) |
| August 28 | 99.7°F (2011) | 66.0°F (2014) | 0.93 in (2015) |
| August 29 | 96.4°F (2011) | 67.6°F (2014) | 1.44 in (2015) |
| August 30 | 92.3°F (2020) | 70.3°F (2007) | 2.80 in (2011) |
| August 31 | 90.5°F (2006) | 71.6°F (2024) | 1.91 in (2007) |