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May Weather in North Charleston, United States

Last updated: June 24, 2025

In May, the average temperature in North Charleston, United States hovers around 23°C (74°F). Expect a range where the minimum can drop to 9°C (49°F) and the maximum can soar to 37°C (98°F). Prepare for some rain, as 87 mm (3.4 in) of precipitation may fall over approximately 9 days. Don't forget, the air tends to be quite humid, with an average humidity of 75%—perfect for that tropical vibe!

May Temperature in North Charleston

In May in North Charleston, the average temperature is 23°C (74°F), with maximums reaching 37°C (98°F) and minimums dropping as low as 9°C (49°F). Be prepared for warm days and cooler nights when traveling to this destination.

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

The chart illustrates May temperature patterns in North Charleston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In North Charleston, May typically has an average temperature of 23°C (74°F), with highs reaching up to 37°C (98°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec525760667479828178725954
Data source: Temperature data for North 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 North Charleston

In North Charleston in May, the precipitation amount is 87 mm (3.4 in), occurring over a span of 9 days.

May Precipitation Trends in North Charleston

The chart displays monthly precipitation patterns in North 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 North Charleston, May typically receives around 87 mm (3.4 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec597860101871501871831767993127
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in North Charleston

In North Charleston in May, humidity is 75%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket wrapping around you, making it feel more sweltering than it actually is, which can be quite uncomfortable for traveling.

May Average Humidity in North Charleston

This chart illustrates the average monthly humidity levels in North 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 North Charleston is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%81%81%79%75%75%80%81%83%78%85%87%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in North Charleston

In North Charleston in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in North Charleston.

Maximum UV Index Levels in North Charleston for May

The chart shows the monthly maximum UV Index (UVI) for North 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 North Charleston typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec47910111111119864
Data source: North 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 North Charleston Compares to Other Months

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

This table compares monthly weather conditions in North Charleston, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (52°F)59 mm (2.3 inches)86%moderate
February Weather14°C (57°F)78 mm (3.1 inches)81%high
March Weather15°C (60°F)60 mm (2.4 inches)81%very high
April Weather19°C (66°F)101 mm (4.0 inches)79%very high
May Weather23°C (74°F)87 mm (3.4 inches)75%extreme
June Weather26°C (79°F)150 mm (5.9 inches)75%extreme
July Weather28°C (82°F)187 mm (7.4 inches)80%extreme
August Weather27°C (81°F)183 mm (7.2 inches)81%extreme
September Weather26°C (78°F)176 mm (6.9 inches)83%very high
October Weather22°C (72°F)79 mm (3.1 inches)78%very high
November Weather15°C (59°F)92 mm (3.6 inches)85%high
December Weather12°C (54°F)127 mm (5.0 inches)87%moderate

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