July Weather in Charleston, United States

Last updated: June 24, 2025

In July, the average temperature in Charleston, United States reaches a warm 27°C (80°F). Visitors can expect a comfortable minimum of 16°C (62°F) and a balmy maximum of 36°C (97°F). Be prepared for some rain, as the region sees about 103 mm (4.1 in) of precipitation over 14 days, coupled with an average humidity of 83%.

July Temperature in Charleston

In July in Charleston, the average temperature is 27°C (80°F), with maximums reaching 36°C (97°F) and minimums dropping as low as 16°C (62°F). This makes it an ideal time for travelers looking to enjoy warm weather while also having the option for cooler evenings.

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

The chart illustrates July 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, July typically has an average temperature of 27°C (80°F), with highs reaching up to 36°C (97°F) and lows dropping to around 16°C (62°F).

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

July Precipitation in Charleston

In Charleston in July, the precipitation amount is 103 mm (4.1 in) distributed over a period of 14 days.

July Precipitation Trends in Charleston

The chart displays monthly precipitation patterns in Charleston, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Charleston, July typically receives around 103 mm (4.1 inches) of precipitation spread over approximately 14 days.

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

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Millimeters (mm) Inches (in)

July Humidity in Charleston

In Charleston in July, humidity is 83%. With an average temperature of 27°C (80°F), this humidity feels like a warm, steamy embrace, making traveling a bit uncomfortable as the air clings to your skin and renders even the slightest exertion more exhausting.

July Average Humidity in Charleston

This chart illustrates the average monthly humidity levels in Charleston, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Charleston is approximately 83%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in Charleston

In Charleston in July, 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 July

The chart shows the monthly maximum UV Index (UVI) for Charleston in July, 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 July, the maximum UV index in Charleston typically reaches 11, which falls under the extreme exposure category.

Data source: Charleston July 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 July 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 July’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 July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (43°F)	94 mm (3.7 inches)	86%	moderate
February Weather	9°C (48°F)	165 mm (6.5 inches)	86%	high
March Weather	12°C (54°F)	157 mm (6.2 inches)	86%	very high
April Weather	16°C (61°F)	149 mm (5.9 inches)	82%	very high
May Weather	21°C (71°F)	111 mm (4.4 inches)	85%	extreme
June Weather	24°C (76°F)	99 mm (3.9 inches)	85%	extreme
July Weather	27°C (80°F)	103 mm (4.1 inches)	83%	extreme
August Weather	26°C (78°F)	126 mm (5.0 inches)	76%	very high
September Weather	24°C (75°F)	94 mm (3.7 inches)	76%	very high
October Weather	18°C (65°F)	124 mm (4.9 inches)	80%	high
November Weather	10°C (51°F)	75 mm (2.9 inches)	88%	high
December Weather	8°C (47°F)	129 mm (5.1 inches)	88%	moderate