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May Weather in Mount Pleasant, United States

Last updated: June 24, 2025

In Mount Pleasant, United States, the average temperature in May is a mild 15°C (58°F), with temperatures swinging from a chilly -3°C (26°F) to a warm 34°C (93°F). Be prepared for some rain, as 116 mm (4.6 in) of precipitation can be expected over 12 days throughout the month. Additionally, the air tends to be quite humid, with an average humidity of 80%.

May Temperature in Mount Pleasant

In May in Mount Pleasant, the average temperature is 15°C (58°F). Maximums can reach 34°C (93°F) and minimums can be as low as -3°C (26°F). Expect a wide range of temperatures, so pack accordingly for your travels.

May Weather in Mount Pleasant: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Mount Pleasant, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mount Pleasant, May typically has an average temperature of 15°C (58°F), with highs reaching up to 34°C (93°F) and lows dropping to around -3°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec242535455868747164523730
Data source: Temperature data for Mount Pleasant 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 Mount Pleasant

In Mount Pleasant in May, the precipitation amount is 116 mm (4.6 in) over a span of 12 days.

May Precipitation Trends in Mount Pleasant

The chart displays monthly precipitation patterns in Mount Pleasant, 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 Mount Pleasant, May typically receives around 116 mm (4.6 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec5558588911611265801041225665
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Mount Pleasant

In Mount Pleasant in May, humidity is 80%. With an average temperature of 15°C (58°F), this humidity feels like a heavy blanket wrapping around you, making travel uncomfortable as you struggle to stay cool and refreshed while exploring the sights.

May Average Humidity in Mount Pleasant

This chart illustrates the average monthly humidity levels in Mount Pleasant, 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 Mount Pleasant is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%85%86%80%80%80%81%80%84%90%86%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Mount Pleasant

In Mount Pleasant in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Mount Pleasant.

Maximum UV Index Levels in Mount Pleasant for May

The chart shows the monthly maximum UV Index (UVI) for Mount Pleasant 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 Mount Pleasant typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
Data source: Mount Pleasant 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 Mount Pleasant Compares to Other Months

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

This table compares monthly weather conditions in Mount Pleasant, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (24°F)55 mm (2.2 inches)88%low
February Weather-4°C (25°F)58 mm (2.3 inches)87%moderate
March Weather2°C (35°F)58 mm (2.3 inches)85%moderate
April Weather7°C (45°F)89 mm (3.5 inches)86%very high
May Weather15°C (58°F)116 mm (4.6 inches)80%very high
June Weather20°C (69°F)112 mm (4.4 inches)80%very high
July Weather23°C (74°F)65 mm (2.5 inches)80%very high
August Weather22°C (71°F)80 mm (3.1 inches)80%very high
September Weather18°C (64°F)104 mm (4.1 inches)80%high
October Weather11°C (52°F)122 mm (4.8 inches)84%moderate
November Weather3°C (38°F)56 mm (2.2 inches)89%moderate
December Weather-1°C (31°F)65 mm (2.6 inches)86%low

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