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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 2°C (36°F), with extremes ranging from a chilly -19°C (-2°F) to a mild 18°C (64°F). Expect 82 mm (3.2 in) of precipitation spread over 10 days, contributing to an average humidity of 87%.

December Temperature in Greenville

In December in Greenville, the average temperature is 2°C (36°F), with maximums reaching 18°C (64°F) and minimums dropping as low as -19°C (-2°F). Travelers should be prepared for a wide range of temperatures during their visit.

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 2°C (36°F), with highs reaching up to 18°C (64°F) and lows dropping to around -19°C (-2°F).
JanFebMarAprMayJunJulAugSepOctNovDec303342516372757368574135
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, the total precipitation amount is 82 mm (3.2 in) observed over a span of 10 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 82 mm (3.2 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec749711410114112710710088989282
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 87%. With an average temperature of 2°C (36°F), this humidity feels like an unwelcome chill that seeps into your bones, making outdoor exploration feel damp and heavy, and encouraging travelers to seek the warmth of indoor attractions instead.

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 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%87%85%81%82%81%73%73%78%89%87%
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 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.

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 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910111098643
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-1°C (30°F)74 mm (2.9 inches)88%moderate
February Weather0°C (33°F)97 mm (3.8 inches)88%moderate
March Weather5°C (42°F)114 mm (4.5 inches)87%high
April Weather11°C (51°F)101 mm (4.0 inches)85%very high
May Weather17°C (64°F)141 mm (5.6 inches)81%very high
June Weather22°C (72°F)127 mm (5.0 inches)82%extreme
July Weather24°C (76°F)107 mm (4.2 inches)81%very high
August Weather23°C (73°F)100 mm (3.9 inches)73%very high
September Weather20°C (69°F)88 mm (3.5 inches)73%very high
October Weather14°C (57°F)98 mm (3.9 inches)78%high
November Weather5°C (41°F)92 mm (3.6 inches)89%moderate
December Weather2°C (36°F)82 mm (3.2 inches)87%moderate

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