Last updated: June 24, 2025
In December, the average temperature in Greenville, United States hovers around 4°C (39°F). Expect chilly conditions, with minimum temperatures plunging to -17°C (1°F) and peaking at a mild 19°C (66°F). Rain is likely, with an average precipitation of 89 mm (3.5 in) spread over 8 days. The air will feel quite damp, as the average humidity sits at a high 85%.
In December in Greenville, the average temperature is 4°C (39°F), with maximums reaching up to 19°C (66°F) and minimums dropping as low as -17°C (1°F). Be prepared for a wide range of temperatures during your travels to Greenville this month.
In Greenville in December, the precipitation amount is 89 mm (3.5 in) over a span of 8 days.
In Greenville in December, humidity is 85%. With an average temperature of 4°C (39°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable and requiring extra layers to ward off the cold and moisture.
In Greenville 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 Greenville, you can check the information here.
UV Risk Categories
Weather in Greenville varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Greenville, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 1°C (34°F) | 65 mm (2.5 inches) | 84% | moderate |
| February Weather | 4°C (40°F) | 101 mm (4.0 inches) | 84% | high |
| March Weather | 7°C (45°F) | 73 mm (2.9 inches) | 84% | very high |
| April Weather | 12°C (54°F) | 114 mm (4.5 inches) | 82% | very high |
| May Weather | 17°C (63°F) | 125 mm (4.9 inches) | 82% | extreme |
| June Weather | 21°C (70°F) | 90 mm (3.5 inches) | 83% | extreme |
| July Weather | 24°C (76°F) | 59 mm (2.3 inches) | 79% | extreme |
| August Weather | 23°C (73°F) | 108 mm (4.2 inches) | 77% | very high |
| September Weather | 20°C (68°F) | 101 mm (4.0 inches) | 75% | very high |
| October Weather | 14°C (58°F) | 108 mm (4.2 inches) | 81% | high |
| November Weather | 6°C (43°F) | 76 mm (3.0 inches) | 87% | moderate |
| December Weather | 4°C (39°F) | 89 mm (3.5 inches) | 85% | moderate |