Last updated: June 24, 2025
In December, the average temperature in Greenville, United States hovers around -1°C (31°F). During this chilly month, temperatures can dip as low as -26°C (-15°F), but may also rise to a maximum of 16°C (61°F). Expect 66 mm (2.6 in) of precipitation over approximately 10 days, contributing to an average humidity level of 86%. Stay warm and prepared!
In December in Greenville, the average temperature is -1°C (31°F). The maximum can reach 16°C (61°F), and the minimum can be as low as -26°C (-15°F). Be sure to pack warm clothing and layers to stay comfortable during your travels!
In Greenville in December, the precipitation amount is 66 mm (2.6 in) over the course of 10 days.
In Greenville in December humidity is 86%. With an average temperature of -1°C (31°F), this humidity feels like an eerie chill enveloping you, making travel uncomfortable as the damp air bites into your skin and the cold seeps through even the warmest of clothes, creating an atmosphere that is heavy and uninviting.
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 | -4°C (25°F) | 62 mm (2.4 inches) | 87% | low |
| February Weather | -4°C (26°F) | 63 mm (2.5 inches) | 87% | moderate |
| March Weather | 2°C (36°F) | 63 mm (2.5 inches) | 86% | moderate |
| April Weather | 8°C (46°F) | 90 mm (3.5 inches) | 87% | very high |
| May Weather | 15°C (59°F) | 128 mm (5.0 inches) | 82% | very high |
| June Weather | 21°C (69°F) | 123 mm (4.8 inches) | 81% | very high |
| July Weather | 24°C (75°F) | 65 mm (2.6 inches) | 78% | very high |
| August Weather | 22°C (72°F) | 74 mm (2.9 inches) | 79% | very high |
| September Weather | 18°C (65°F) | 116 mm (4.5 inches) | 79% | high |
| October Weather | 11°C (52°F) | 129 mm (5.1 inches) | 82% | moderate |
| November Weather | 3°C (38°F) | 61 mm (2.4 inches) | 87% | moderate |
| December Weather | -1°C (31°F) | 66 mm (2.6 inches) | 86% | low |