December weather in St. Marys, GA
The average temperature in St. Marys in December is 55.3°F (45.7°F–64.8°F). Average precipitation: 3.06 inches.
December is a winter month in St. Marys, and is cooler than the annual average of 67.8°F. Daily temperatures swing about 19.1°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 10h 1m. For travel, December is a comfortable month to visit.
Avg High
64.8°F
Avg Low
45.7°F
Precipitation
3.06 in
Daylight
10h 1m
December records in St. Marys
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 82.0°F (2019) | 32.0°F (2020) | 0.26 in (2018) |
| December 2 | 80.2°F (2015) | 30.6°F (2020) | 1.15 in (2018) |
| December 3 | 77.2°F (2018) | 29.8°F (2008) | 0.52 in (2023) |
| December 4 | 75.9°F (2013) | 31.5°F (2024) | 0.26 in (2009) |
| December 5 | 80.2°F (2013) | 34.5°F (2007) | 0.85 in (2009) |
| December 6 | 81.3°F (2016) | 29.3°F (2024) | 1.05 in (2016) |
| December 7 | 80.8°F (2013) | 27.1°F (2024) | 1.36 in (2025) |
| December 8 | 81.0°F (2022) | 24.1°F (2010) | 2.71 in (2005) |
| December 9 | 80.6°F (2009) | 30.0°F (2020) | 1.31 in (2009) |
| December 10 | 78.4°F (2019) | 32.2°F (2017) | 0.43 in (2023) |
| December 11 | 78.8°F (2021) | 28.0°F (2017) | 0.29 in (2008) |
| December 12 | 78.3°F (2016) | 34.7°F (2018) | 1.26 in (2011) |
| December 13 | 78.6°F (2007) | 29.7°F (2010) | 2.03 in (2019) |
| December 14 | 79.5°F (2020) | 22.8°F (2010) | 0.80 in (2018) |
| December 15 | 82.0°F (2009) | 27.9°F (2010) | 0.33 in (2018) |
| December 16 | 76.5°F (2021) | 31.6°F (2010) | 1.10 in (2007) |
| December 17 | 79.5°F (2015) | 28.8°F (2007) | 3.13 in (2023) |
| December 18 | 80.2°F (2016) | 28.8°F (2007) | 0.71 in (2009) |
| December 19 | 77.9°F (2008) | 32.9°F (2019) | 0.14 in (2021) |
| December 20 | 78.6°F (2017) | 27.0°F (2004) | 0.84 in (2020) |
| December 21 | 75.2°F (2008) | 27.7°F (2004) | 1.18 in (2014) |
| December 22 | 80.2°F (2013) | 30.2°F (2005) | 2.80 in (2019) |
| December 23 | 81.7°F (2013) | 28.8°F (2012) | 0.85 in (2019) |
| December 24 | 81.3°F (2015) | 22.8°F (2022) | 0.82 in (2014) |
| December 25 | 78.8°F (2008) | 25.3°F (2022) | 2.35 in (2006) |
| December 26 | 78.1°F (2025) | 20.1°F (2022) | 0.48 in (2012) |
| December 27 | 78.3°F (2025) | 26.6°F (2022) | 0.26 in (2015) |
| December 28 | 79.5°F (2014) | 25.3°F (2010) | 0.56 in (2018) |
| December 29 | 81.5°F (2015) | 26.4°F (2010) | 0.58 in (2013) |
| December 30 | 80.1°F (2021) | 30.0°F (2010) | 0.18 in (2006) |
| December 31 | 82.2°F (2021) | 30.0°F (2016) | 0.19 in (2017) |