Last updated: June 24, 2025
In December, the average temperature in Greenville, United States hovers around -6°C (21°F), with extremes reaching as low as -26°C (-14°F) and soaring up to 14°C (57°F). This chilly month sees an average precipitation of 101 mm (4.0 in) spread over 10 days, while humidity levels remain high at an average of 84%. Be prepared for a wintery experience!
In December in Greenville, the average temperature is -6°C (21°F), with maximums reaching 14°C (57°F) and minimums plunging to -26°C (-14°F). It's essential to prepare for a range of temperatures and dress warmly if you're planning to travel during this time.
In Greenville in December, the precipitation amount is 101 mm (4.0 in) spread over the course of 10 days.
In Greenville in December humidity is 84%. With an average temperature of -6°C (21°F), this humidity feels like an icy blanket enveloping you, making travel uncomfortable as the cold dampness seeps into your bones and slows your movements, turning each step into a shivering struggle.
In Greenville 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 Greenville, you can visit Hourly UV Index in Greenville.
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 | -9°C (16°F) | 86 mm (3.4 inches) | 88% | low |
| February Weather | -8°C (19°F) | 82 mm (3.2 inches) | 88% | moderate |
| March Weather | -4°C (26°F) | 75 mm (3.0 inches) | 85% | moderate |
| April Weather | 3°C (38°F) | 115 mm (4.5 inches) | 81% | very high |
| May Weather | 10°C (51°F) | 98 mm (3.9 inches) | 76% | very high |
| June Weather | 16°C (61°F) | 86 mm (3.4 inches) | 74% | very high |
| July Weather | 19°C (67°F) | 103 mm (4.0 inches) | 74% | very high |
| August Weather | 19°C (66°F) | 88 mm (3.5 inches) | 74% | very high |
| September Weather | 14°C (58°F) | 80 mm (3.2 inches) | 77% | high |
| October Weather | 8°C (47°F) | 124 mm (4.9 inches) | 82% | moderate |
| November Weather | 0°C (33°F) | 106 mm (4.2 inches) | 85% | moderate |
| December Weather | -6°C (21°F) | 101 mm (4.0 inches) | 84% | low |