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June Weather in Charleston, United States

Last updated: June 24, 2025

In June, the average temperature in Charleston, United States is a pleasant 25°C (78°F). Visitors can expect a range between a minimum of 12°C (54°F) and a maximum of 36°C (97°F). During this time, precipitation averages around 112 mm (4.4 in), typically spread over 10 days, alongside a relatively high average humidity of 83%. Whether you’re soaking up the sun or seeking shade, be prepared for a warm and humid experience!

June Temperature in Charleston

In June in Charleston, the average temperature is 25°C (78°F). Maximum temperatures can reach 36°C (97°F), while minimums can dip as low as 12°C (54°F). This weather makes Charleston a perfect destination for travelers seeking warm days and cooler evenings.

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

The chart illustrates June 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, June typically has an average temperature of 25°C (78°F), with highs reaching up to 36°C (97°F) and lows dropping to around 12°C (54°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.

June Precipitation in Charleston

In Charleston in June, the total precipitation amount is 112 mm (4.4 in) over the course of 10 days.

June Precipitation Trends in Charleston

The chart displays monthly precipitation patterns in Charleston, with values for each month alongside June’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how June’s conditions compare to those of other months. In Charleston, June typically receives around 112 mm (4.4 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec1101391691411511121011028512210197
Data source: Precipitation data for June generated using information from the Copernicus Climate Change Service.
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June Humidity in Charleston

In Charleston in June, humidity is 83%. With an average temperature of 25°C (78°F), this humidity feels like stepping into a warm, damp embrace, making travel sticky and exhausting, as each movement can leave you drenched in sweat.

June Average Humidity in Charleston

This chart illustrates the average monthly humidity levels in Charleston, with June’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In June, average humidity in Charleston is approximately 83%, 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 June generated using information from the Copernicus Climate Change Service.

June UV Index in Charleston

In Charleston in June, 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 Charleston.

Maximum UV Index Levels in Charleston for June

The chart shows the monthly maximum UV Index (UVI) for Charleston in June, 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 June, the maximum UV index in Charleston typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710111110109753
Data source: Charleston June 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 June 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 June’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 June’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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