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January Weather in Greenville, United States

Last updated: June 24, 2025

In Greenville, United States, the average temperature in January hovers around 3°C (38°F). Expect chilly days, with minimum temperatures plummeting to -19°C (-3°F) and maximums rising to a comfy 21°C (71°F). Precipitation is notable, averaging 91 mm (3.6 in) over 9 days of the month, while the average humidity is a brisk 87%.

January Temperature in Greenville

In January in Greenville, the average temperature is 3°C (38°F). The maximum can reach 21°C (71°F), while the minimum can drop as low as -19°C (-3°F). Travelers should be prepared for a wide range of temperatures during this time.

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

The chart illustrates January 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, January typically has an average temperature of 3°C (38°F), with highs reaching up to 21°C (71°F) and lows dropping to around -19°C (-3°F).
JanFebMarAprMayJunJulAugSepOctNovDec374250586977807873624743
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.

January Precipitation in Greenville

In Greenville in January, the precipitation amount is 91 mm (3.6 in) spread over 9 days.

January Precipitation Trends in Greenville

The chart displays monthly precipitation patterns in Greenville, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Greenville, January typically receives around 91 mm (3.6 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec921501231511201271081029910985109
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Greenville

In Greenville in January humidity is 87%. With an average temperature of 3°C (38°F), this humidity feels like a chilly blanket wrapped around you, making travel quite uncomfortable as the cold dampness seeps into your clothes and lingers in the air, often leaving you shivering and longing for warmer, drier conditions.

January Average Humidity in Greenville

This chart illustrates the average monthly humidity levels in Greenville, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Greenville is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%86%86%82%83%83%80%74%71%78%88%88%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Greenville

In Greenville in January, 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 January

The chart shows the monthly maximum UV Index (UVI) for Greenville in January, 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 January, the maximum UV index in Greenville typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101110109753
Data source: Greenville January 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 January 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 January’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 January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)91 mm (3.6 inches)87%moderate
February Weather5°C (42°F)150 mm (5.9 inches)86%high
March Weather10°C (51°F)123 mm (4.8 inches)86%high
April Weather14°C (58°F)151 mm (5.9 inches)82%very high
May Weather21°C (70°F)120 mm (4.7 inches)82%very high
June Weather25°C (77°F)127 mm (5.0 inches)83%extreme
July Weather27°C (81°F)108 mm (4.3 inches)80%very high
August Weather26°C (78°F)102 mm (4.0 inches)74%very high
September Weather23°C (74°F)99 mm (3.9 inches)71%very high
October Weather17°C (62°F)109 mm (4.3 inches)78%high
November Weather8°C (47°F)85 mm (3.3 inches)88%moderate
December Weather6°C (43°F)108 mm (4.3 inches)88%moderate

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