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May Weather in South Charleston, United States

Last updated: June 24, 2025

In May, the average temperature in South Charleston, United States hovers around 18°C (64°F), with a minimum plunging to -1°C (31°F) and a maximum reaching a warm 32°C (91°F). Expect about 125 mm (4.9 in) of precipitation spread over 15 days, contributing to an average humidity of 81%. Prepare for a month of diverse weather conditions!

May Temperature in South Charleston

In May in South Charleston, the average temperature is 18°C (64°F). Maximum temperatures can reach 32°C (91°F), while the minimum can drop as low as -1°C (31°F). Visitors should be prepared for a wide range of temperatures when traveling during this time.

May Weather in South Charleston: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in South Charleston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In South Charleston, May typically has an average temperature of 18°C (64°F), with highs reaching up to 32°C (91°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec313443526472767369584236
Data source: Temperature data for South Charleston 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 South Charleston

In South Charleston in May, the precipitation amount is 125 mm (4.9 in) over a span of 15 days.

May Precipitation Trends in South Charleston

The chart displays monthly precipitation patterns in South Charleston, 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 South Charleston, May typically receives around 125 mm (4.9 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec7911111611112513511487919598102
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in South Charleston

In South Charleston in May, humidity is 81%. With an average temperature of 18°C (64°F), this humidity feels like a warm embrace, making travel both refreshing and slightly stifling at the same time.

May Average Humidity in South Charleston

This chart illustrates the average monthly humidity levels in South Charleston, 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 South Charleston is approximately 81%, 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 May generated using information from the Copernicus Climate Change Service.

May UV Index in South Charleston

In South Charleston 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 South Charleston.

Maximum UV Index Levels in South Charleston for May

The chart shows the monthly maximum UV Index (UVI) for South Charleston 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 South Charleston typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098643
Data source: South Charleston 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 South Charleston Compares to Other Months

Weather in South Charleston varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in South Charleston, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in South Charleston, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)79 mm (3.1 inches)88%moderate
February Weather1°C (35°F)111 mm (4.4 inches)88%moderate
March Weather6°C (43°F)116 mm (4.6 inches)87%high
April Weather11°C (52°F)111 mm (4.4 inches)85%very high
May Weather18°C (64°F)125 mm (4.9 inches)81%very high
June Weather22°C (72°F)135 mm (5.3 inches)82%very high
July Weather24°C (76°F)114 mm (4.5 inches)81%very high
August Weather23°C (74°F)87 mm (3.4 inches)73%very high
September Weather21°C (69°F)91 mm (3.6 inches)73%very high
October Weather14°C (58°F)95 mm (3.8 inches)78%high
November Weather6°C (42°F)98 mm (3.9 inches)89%moderate
December Weather2°C (37°F)102 mm (4.0 inches)87%moderate

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