Last updated: June 24, 2025
In Athens, United States, the average temperature in December hovers around -5°C (23°F), with extremes ranging from a chilly minimum of -26°C (-15°F) to a maximum of 14°C (58°F). Expect about 120 mm (4.7 in) of precipitation spread over 11 days, while the air carries a high average humidity of 84%. Get ready for a cold and damp experience!
In December in Athens, the average temperature is -5°C (23°F), with a maximum reaching 14°C (58°F) and a minimum dropping as low as -26°C (-15°F). Be prepared for a wide temperature range and dress in layers if you plan to travel during this time.
In Athens in December, the precipitation amount is 120 mm (4.7 in) during a span of 11 days.
In Athens in December, humidity is 84%. With an average temperature of -5°C (23°F), this humidity feels like an icy blanket wrapping around you, making the cold air bite even deeper and turning travel into a brisk, challenging adventure where each breath comes with a frosty reminder of the chill.
In Athens 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 Athens, you can visit Hourly UV Index in Athens.
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 | -8°C (18°F) | 87 mm (3.4 inches) | 88% | low |
| February Weather | -7°C (21°F) | 83 mm (3.3 inches) | 88% | moderate |
| March Weather | -2°C (28°F) | 74 mm (2.9 inches) | 85% | moderate |
| April Weather | 5°C (41°F) | 125 mm (4.9 inches) | 81% | very high |
| May Weather | 12°C (54°F) | 91 mm (3.6 inches) | 76% | very high |
| June Weather | 17°C (63°F) | 87 mm (3.4 inches) | 74% | very high |
| July Weather | 20°C (69°F) | 104 mm (4.1 inches) | 74% | very high |
| August Weather | 20°C (67°F) | 79 mm (3.1 inches) | 74% | very high |
| September Weather | 15°C (60°F) | 73 mm (2.9 inches) | 77% | high |
| October Weather | 9°C (48°F) | 131 mm (5.2 inches) | 82% | moderate |
| November Weather | 1°C (34°F) | 112 mm (4.4 inches) | 85% | moderate |
| December Weather | -5°C (23°F) | 120 mm (4.7 inches) | 84% | low |