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December Weather in Greenville, United States

Last updated: June 24, 2025

In Greenville, United States, the average temperature in December hovers around 1°C (34°F). However, temperatures can vary dramatically, with minimums dipping to -17°C (1°F) and maximums reaching 17°C (63°F). During this month, expect approximately 102 mm (4.0 in) of precipitation spread over 13 days, contributing to a notable average humidity of 86%.

December Temperature in Greenville

In December in Greenville, the average temperature is 1°C (34°F). Maximums can reach 17°C (63°F), while minimums can drop as low as -17°C (1°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

December Weather in Greenville: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Greenville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Greenville, December typically has an average temperature of 1°C (34°F), with highs reaching up to 17°C (63°F) and lows dropping to around -17°C (1°F).
JanFebMarAprMayJunJulAugSepOctNovDec283138486068737166554034
Data source: Temperature data for Greenville generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Greenville

In Greenville in December, precipitation amounts to 102 mm (4.0 in) over the course of 13 days.

December Precipitation Trends in Greenville

The chart displays monthly precipitation patterns in Greenville, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Greenville, December typically receives around 102 mm (4.0 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec96102111130140138138102100124105102
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Greenville

In Greenville in December, humidity is 86%. With an average temperature of 1°C (34°F), this humidity feels like a chilling embrace, making outdoor adventures brisk and invigorating but challenging for travel.

December Average Humidity in Greenville

This chart illustrates the average monthly humidity levels in Greenville, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Greenville is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%87%87%81%83%82%76%77%82%89%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Greenville

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.

Maximum UV Index Levels in Greenville for December

The chart shows the monthly maximum UV Index (UVI) for Greenville in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Greenville typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346910101098642
Data source: Greenville December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Greenville Compares to Other Months

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.

This table compares monthly weather conditions in Greenville, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)96 mm (3.8 inches)88%moderate
February Weather-1°C (31°F)102 mm (4.0 inches)88%moderate
March Weather3°C (38°F)111 mm (4.4 inches)87%high
April Weather9°C (48°F)130 mm (5.1 inches)87%very high
May Weather15°C (60°F)140 mm (5.5 inches)81%very high
June Weather20°C (68°F)138 mm (5.4 inches)83%very high
July Weather23°C (73°F)138 mm (5.4 inches)82%very high
August Weather21°C (71°F)102 mm (4.0 inches)76%very high
September Weather19°C (66°F)100 mm (3.9 inches)77%very high
October Weather13°C (55°F)124 mm (4.9 inches)82%high
November Weather4°C (40°F)105 mm (4.1 inches)89%moderate
December Weather1°C (34°F)102 mm (4.0 inches)86%low

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