Last updated: June 24, 2025
In December, the average temperature in Bluffton, United States hovers around 2°C (35°F), with extremes ranging from a brisk -23°C (-9°F) to a surprisingly warm 17°C (63°F). Expect 62 mm (2.5 in) of precipitation spread over 11 days, along with an average humidity level of 86%, creating a chilly yet dynamic atmosphere.
In December in Bluffton, the average temperature is 2°C (35°F). Maximums can reach 17°C (63°F) and minimums can be as low as -23°C (-9°F). Be prepared for a wide range of temperatures when traveling to Bluffton during this month.
In Bluffton in December, the precipitation amount is 62 mm (2.5 in), occurring over a span of 11 days.
In Bluffton 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 Bluffton 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 Bluffton, you can visit Hourly UV Index in Bluffton.
UV Risk Categories
Weather in Bluffton varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Bluffton, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (29°F) | 73 mm (2.9 inches) | 88% | moderate |
| February Weather | 0°C (32°F) | 83 mm (3.3 inches) | 87% | moderate |
| March Weather | 5°C (41°F) | 95 mm (3.8 inches) | 87% | high |
| April Weather | 10°C (50°F) | 99 mm (3.9 inches) | 87% | very high |
| May Weather | 17°C (63°F) | 134 mm (5.3 inches) | 81% | very high |
| June Weather | 22°C (72°F) | 122 mm (4.8 inches) | 82% | very high |
| July Weather | 24°C (76°F) | 110 mm (4.3 inches) | 81% | very high |
| August Weather | 23°C (73°F) | 88 mm (3.4 inches) | 78% | very high |
| September Weather | 20°C (68°F) | 70 mm (2.8 inches) | 78% | very high |
| October Weather | 14°C (57°F) | 91 mm (3.6 inches) | 82% | high |
| November Weather | 5°C (42°F) | 85 mm (3.3 inches) | 89% | moderate |
| December Weather | 2°C (35°F) | 62 mm (2.5 inches) | 86% | low |