Last updated: June 24, 2025
In December, the average temperature in Atlanta, United States hovers around 2°C (35°F), making it a chilly time of year. Expect the mercury to dip as low as -22°C (-8°F), while on warmer days, it might reach up to 17°C (64°F). With precipitation totaling 69 mm (2.7 in) over 10 days, and an average humidity of 86%, it's essential to be prepared for both the cold and damp conditions.
In December in Atlanta, the average temperature is 2°C (35°F), with maximums reaching 17°C (64°F) and minimums dipping as low as -22°C (-8°F). Travelers should be prepared for a wide range of temperatures and dress accordingly for both warmth and cooler conditions.
In Atlanta in December, the precipitation amount is 69 mm (2.7 in) spread over a period of 10 days.
In Atlanta in December humidity is 86%. With an average temperature of 2°C (35°F), this humidity feels like a damp chill that seeps into your bones, making traveling quite uncomfortable as your clothes cling to you and the cold air cuts through any warmth you try to find.
In Atlanta in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Atlanta, you can visit Hourly UV Index in Atlanta.
UV Risk Categories
Weather in Atlanta varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Atlanta, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (29°F) | 78 mm (3.1 inches) | 85% | moderate |
| February Weather | 0°C (32°F) | 87 mm (3.4 inches) | 85% | moderate |
| March Weather | 5°C (42°F) | 113 mm (4.4 inches) | 86% | high |
| April Weather | 11°C (52°F) | 93 mm (3.7 inches) | 87% | very high |
| May Weather | 18°C (64°F) | 143 mm (5.6 inches) | 81% | very high |
| June Weather | 23°C (73°F) | 113 mm (4.4 inches) | 82% | extreme |
| July Weather | 24°C (76°F) | 106 mm (4.2 inches) | 81% | very high |
| August Weather | 23°C (73°F) | 101 mm (4.0 inches) | 79% | very high |
| September Weather | 20°C (69°F) | 75 mm (2.9 inches) | 78% | very high |
| October Weather | 14°C (57°F) | 105 mm (4.1 inches) | 81% | high |
| November Weather | 5°C (41°F) | 83 mm (3.3 inches) | 89% | moderate |
| December Weather | 2°C (35°F) | 69 mm (2.7 inches) | 86% | low |