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April Weather in Charleston, United States

Last updated: June 24, 2025

The average temperature in Charleston, United States during April is a mild 14°C (58°F). Expect variability, with temperatures ranging from a chilly -2°C (29°F) to a warm 30°C (86°F). Be prepared for 140 mm (5.5 in) of precipitation spread over 12 days, contributing to an overall average humidity of 80%.

April Temperature in Charleston

In April in Charleston, the average temperature is 14°C (58°F). Maximum temperatures can reach 30°C (86°F), while the minimum can drop as low as -2°C (29°F). Travelers should be prepared for a wide range of weather conditions during this month.

April Weather in Charleston: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Charleston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Charleston, April typically has an average temperature of 14°C (58°F), with highs reaching up to 30°C (86°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec374151587077817874624743
Data source: Temperature data for 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.

April Precipitation in Charleston

In Charleston in April, the total precipitation amount is 140 mm (5.5 in) over the course of 12 days.

April Precipitation Trends in Charleston

The chart displays monthly precipitation patterns in Charleston, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Charleston, April typically receives around 140 mm (5.5 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec1101391691411511121011028512210197
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Charleston

In Charleston in April humidity is 80%. With an average temperature of 14°C (58°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities sweltering and uncomfortable for travel.

April Average Humidity in Charleston

This chart illustrates the average monthly humidity levels in Charleston, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Charleston is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%84%80%82%83%80%76%75%75%85%88%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Charleston

In Charleston in April, 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 Charleston.

Maximum UV Index Levels in Charleston for April

The chart shows the monthly maximum UV Index (UVI) for Charleston in April, 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 April, the maximum UV index in Charleston typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710111110109753
Data source: Charleston April 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 April Weather in Charleston Compares to Other Months

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

This table compares monthly weather conditions in Charleston, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)110 mm (4.3 inches)86%moderate
February Weather5°C (41°F)139 mm (5.5 inches)84%high
March Weather10°C (51°F)169 mm (6.6 inches)84%high
April Weather14°C (58°F)140 mm (5.5 inches)80%very high
May Weather21°C (70°F)151 mm (6.0 inches)82%extreme
June Weather25°C (78°F)112 mm (4.4 inches)83%extreme
July Weather27°C (81°F)101 mm (4.0 inches)79%very high
August Weather25°C (78°F)102 mm (4.0 inches)76%very high
September Weather23°C (74°F)85 mm (3.3 inches)75%very high
October Weather16°C (62°F)122 mm (4.8 inches)74%high
November Weather8°C (47°F)101 mm (4.0 inches)85%moderate
December Weather6°C (43°F)97 mm (3.8 inches)88%moderate

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