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May Weather in Greenville, United States

Last updated: June 24, 2025

In Greenville, United States, the average temperature in May hovers around 21°C (70°F). However, be prepared for a wide range, with minimums dipping to 2°C (37°F) and maximums soaring up to 36°C (97°F). Expect approximately 120 mm (4.7 in) of precipitation over 13 days, coupled with an average humidity of 82%.

May Temperature in Greenville

In May in Greenville, the average temperature is 21°C (70°F), with maximums reaching 36°C (97°F) and minimums dropping as low as 2°C (37°F). Be sure to pack a variety of clothing to enjoy the warm days and cooler nights during your visit.

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

The chart illustrates May 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, May typically has an average temperature of 21°C (70°F), with highs reaching up to 36°C (97°F) and lows dropping to around 2°C (37°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.

May Precipitation in Greenville

In Greenville in May, the precipitation amount is 120 mm (4.7 in) spread over 13 days.

May Precipitation Trends in Greenville

The chart displays monthly precipitation patterns in Greenville, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Greenville, May typically receives around 120 mm (4.7 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec921501231511201271081029910985109
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Greenville

In Greenville in May, humidity is 82%. With an average temperature of 21°C (70°F), this humidity feels like a warm, sticky embrace that can quickly lead to discomfort for travelers, making outdoor activities less enjoyable and requiring frequent breaks for hydration.

May Average Humidity in Greenville

This chart illustrates the average monthly humidity levels in Greenville, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Greenville is approximately 82%, 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 May generated using information from the Copernicus Climate Change Service.

May UV Index in Greenville

In Greenville in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Greenville.

Maximum UV Index Levels in Greenville for May

The chart shows the monthly maximum UV Index (UVI) for Greenville in May, 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 May, the maximum UV index in Greenville typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101110109753
Data source: Greenville May 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 May 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 May’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 May’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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