June Weather in Charleston, United States

Last updated: June 24, 2025

In June, the average temperature in Charleston, United States is a pleasant 26°C (79°F), making it an ideal time for outdoor activities. You'll experience a minimum of 14°C (57°F) and a maximum of 35°C (95°F), showcasing a diverse range of weather. Be prepared for some rain, as the region sees an average precipitation of 134 mm (5.3 in) over 14 days. With an average humidity of 80%, it's advisable to stay hydrated and enjoy the lush landscapes!

June Temperature in Charleston

In June in Charleston, the average temperature is 26°C (79°F). Maximums can reach 35°C (95°F), while minimums can drop to as low as 14°C (57°F). This makes it an ideal time for travelers to enjoy a warm climate with comfortable 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 26°C (79°F), with highs reaching up to 35°C (95°F) and lows dropping to around 14°C (57°F).

Data source: Temperature data for Charleston generated using information from the Copernicus Climate Change Service.

June Precipitation in Charleston

In Charleston in June, the total precipitation amount is 134 mm (5.3 in) over the course of 14 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 134 mm (5.3 inches) of precipitation spread over approximately 14 days.

Data source: Precipitation data for June generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

June Humidity in Charleston

In Charleston in June humidity is 80%. With an average temperature of 26°C (79°F), this humidity feels like a heavy blanket, making outdoor activities feel sticky and exhausting, potentially dampening the travel experience and necessitating frequent breaks to cool down and hydrate.

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 80%, offering insight into how humid the weather typically is during this month.

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.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (45°F)	120 mm (4.7 inches)	84%	moderate
February Weather	10°C (49°F)	195 mm (7.7 inches)	83%	high
March Weather	14°C (58°F)	168 mm (6.6 inches)	80%	very high
April Weather	17°C (63°F)	149 mm (5.9 inches)	82%	very high
May Weather	22°C (73°F)	115 mm (4.5 inches)	83%	extreme
June Weather	26°C (79°F)	134 mm (5.3 inches)	80%	extreme
July Weather	28°C (82°F)	112 mm (4.4 inches)	80%	extreme
August Weather	27°C (81°F)	124 mm (4.9 inches)	75%	very high
September Weather	25°C (78°F)	100 mm (3.9 inches)	73%	very high
October Weather	19°C (67°F)	113 mm (4.5 inches)	76%	high
November Weather	11°C (53°F)	84 mm (3.3 inches)	84%	high
December Weather	10°C (50°F)	143 mm (5.6 inches)	88%	moderate