Last updated: June 24, 2025
In December, the average temperature in Athens, United States hovers around 4°C (39°F). You'll want to be prepared for chilly conditions, as temperatures can dip to a brisk -14°C (8°F), while the mercury can rise to a comfortable 19°C (67°F). Expect 116 mm (4.6 in) of precipitation spread over about 11 days, contributing to an average humidity of 86%. Enjoy your time in this season of contrasts!
In December in Athens, the average temperature is 4°C (39°F), with maximums reaching 19°C (67°F) and minimums dropping as low as -14°C (8°F). Travelers should be prepared for a range of temperatures, making layered clothing essential for comfort during their visit.
In Athens in December, the precipitation amount is 116 mm (4.6 in) over the course of 11 days.
In Athens in December humidity is 86%. With an average temperature of 4°C (39°F), this humidity feels like a chilly mist enveloping you, making it essential to bundle up while exploring, as each breath comes with a damp chill that can be quite refreshing yet starkly invigorating for travelers.
In Athens in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Athens, you can check the information here.
UV Risk Categories
Weather in Athens varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Athens, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 1°C (34°F) | 89 mm (3.5 inches) | 88% | moderate |
| February Weather | 3°C (38°F) | 125 mm (4.9 inches) | 88% | moderate |
| March Weather | 7°C (45°F) | 116 mm (4.5 inches) | 88% | high |
| April Weather | 12°C (54°F) | 140 mm (5.5 inches) | 86% | very high |
| May Weather | 18°C (65°F) | 142 mm (5.6 inches) | 82% | very high |
| June Weather | 22°C (72°F) | 148 mm (5.8 inches) | 84% | very high |
| July Weather | 25°C (77°F) | 111 mm (4.4 inches) | 82% | very high |
| August Weather | 24°C (75°F) | 124 mm (4.9 inches) | 73% | very high |
| September Weather | 21°C (70°F) | 103 mm (4.0 inches) | 73% | very high |
| October Weather | 15°C (60°F) | 107 mm (4.2 inches) | 81% | high |
| November Weather | 7°C (44°F) | 83 mm (3.3 inches) | 89% | moderate |
| December Weather | 4°C (39°F) | 116 mm (4.6 inches) | 86% | moderate |