Last updated: June 24, 2025
In Atlanta, United States, the average temperature in December hovers around -3°C (27°F). However, be prepared for extremes, as it can dip to a chilling -26°C (-15°F) or rise to a surprisingly warm 15°C (60°F). During this month, expect about 64 mm (2.5 in) of precipitation over approximately 13 days, accompanied by a high average humidity of 89%. Stay cozy and ready for varied weather conditions!
In December in Atlanta, the average temperature is -3°C (27°F), with maximums reaching 15°C (60°F) and minimums plummeting to as low as -26°C (-15°F). Travelers should be prepared for a wide range of temperatures and dress accordingly for outdoor activities.
In Atlanta in December, the precipitation amount is 64 mm (2.5 in) spread over 13 days.
In Atlanta in December, humidity is 89%. With an average temperature of -3°C (27°F), this humidity feels like a biting chill that seeps into your bones, making outdoor activities uncomfortable and breath a visible frost as you navigate through the wintery landscape.
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 | -7°C (20°F) | 49 mm (1.9 inches) | 92% | low |
| February Weather | -6°C (21°F) | 55 mm (2.1 inches) | 91% | moderate |
| March Weather | -1°C (30°F) | 55 mm (2.2 inches) | 87% | moderate |
| April Weather | 5°C (41°F) | 94 mm (3.7 inches) | 85% | high |
| May Weather | 13°C (55°F) | 101 mm (4.0 inches) | 79% | very high |
| June Weather | 18°C (65°F) | 105 mm (4.1 inches) | 75% | very high |
| July Weather | 21°C (70°F) | 87 mm (3.4 inches) | 75% | very high |
| August Weather | 20°C (68°F) | 95 mm (3.7 inches) | 75% | very high |
| September Weather | 16°C (60°F) | 69 mm (2.7 inches) | 79% | high |
| October Weather | 9°C (48°F) | 116 mm (4.6 inches) | 85% | moderate |
| November Weather | 1°C (34°F) | 62 mm (2.4 inches) | 88% | moderate |
| December Weather | -3°C (27°F) | 64 mm (2.5 inches) | 89% | low |