Atlanta Weather in December
United States · Humid Subtropical climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
December in Atlanta sees average temperatures ranging from a low of 4.0°C (39.2°F) to a high of 13.3°C (55.9°F), with a mean of 8.3°C (46.9°F). Compared to the annual average of 16.7°C (62.1°F), this month is 8.4°C cooler than the yearly norm. Precipitation averages 115.3mm, making it approximately 20.0mm drier than the monthly average of 136.0mm. The city receives an average of 6.4 hours of sunshine per day during December, with relative humidity averaging 74.5%. Wind speeds reach an average maximum of 18.7 km/h. For travelers, this month offers a temperature experience in Atlanta, with drier-than-average conditions compared to the rest of the year.
Atlanta's humid subtropical climate creates hot summers and mild winters. I've studied the data and found that the city's tree canopy provides some relief from the summer heat. The best time for visiting is March to May and September to November, when temperatures are comfortable and the city's parks and outdoor attractions are most enjoyable.
December vs Adjacent Months
| Metric | November | December | January |
|---|---|---|---|
| Mean Temp | 12.1°C (53.8°F) | 8.3°C (46.9°F) | 6.9°C (44.4°F) |
| Rainfall | 72.0mm | 115.3mm | 141.2mm |
| Sunshine | 7.7 hrs | 6.4 hrs | 6.6 hrs |
| Humidity | 70.4% | 74.5% | 73.0% |
| Wind | 18.4 km/h | 18.7 km/h | 21.3 km/h |
| Rainy Days | 10.6 | 13.2 | 14.6 |
| Snowfall | 0.0 cm | 0.0 cm | 0.9 cm |
Seasonal Context
December falls in Winter in the Northern Hemisphere. Winter is the coolest season with the shortest daylight hours. For travelers visiting Atlanta in December, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Atlanta in December?
The average temperature in Atlanta during December ranges from 4.0°C (39.2°F) to 13.3°C (55.9°F), with a mean of 8.3°C (46.9°F).
How much does it rain in Atlanta in December?
Atlanta receives an average of 115.3mm of precipitation in December, spread across approximately 13.2 rainy days.
What should I pack for Atlanta in December?
Based on December weather data, pack warm layers, a medium jacket, and waterproof outerwear. Rain gear is essential — this month averages 115.3mm of precipitation.
Is December a good time to visit Atlanta?
December is a cooler month, suitable for travelers who prefer mild weather and fewer crowds. Pack warm layers and enjoy indoor attractions.
Other Months for Atlanta
Cities with Similar December Climate (Humid Subtropical)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 33.75°, -84.39°. Timezone: America/New_York. Last updated: 2026-07-30.