Last updated: June 24, 2025
In August, the average temperature in Charleston, United States reaches a warm 27°C (80°F). Visitors can expect a minimum temperature of 16°C (62°F) and a maximum soaring up to 38°C (101°F). With an average humidity of 61%, the climate can feel quite warm and humid. Additionally, be prepared for 125 mm (4.9 in) of precipitation spread over 11 days, making it wise to carry an umbrella as you explore!
In August in Charleston, the average temperature is 27°C (80°F). Maximum temperatures can reach up to 38°C (101°F), while minimums can drop to as low as 16°C (62°F). This climate makes Charleston a great destination for travelers looking to enjoy warm weather and outdoor activities.
In Charleston in August, the precipitation amount is 125 mm (4.9 in) over the course of 11 days.
In Charleston in August, humidity is 61%. With an average temperature of 27°C (80°F), this humidity feels like a warm embrace, making travel feel slightly sultry but manageable, adding a touch of heaviness to the air that invites you to explore the local culture at a leisurely pace.
In Charleston in August, 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.
UV Risk Categories
Weather in Charleston varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Charleston, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 5°C (41°F) | 80 mm (3.1 inches) | 82% | moderate |
February Weather | 7°C (45°F) | 116 mm (4.6 inches) | 79% | high |
March Weather | 13°C (55°F) | 131 mm (5.1 inches) | 77% | very high |
April Weather | 16°C (61°F) | 161 mm (6.3 inches) | 78% | very high |
May Weather | 21°C (70°F) | 197 mm (7.8 inches) | 82% | extreme |
June Weather | 26°C (78°F) | 109 mm (4.3 inches) | 81% | extreme |
July Weather | 28°C (82°F) | 87 mm (3.4 inches) | 75% | extreme |
August Weather | 27°C (80°F) | 125 mm (4.9 inches) | 61% | very high |
September Weather | 25°C (76°F) | 59 mm (2.3 inches) | 59% | very high |
October Weather | 17°C (64°F) | 113 mm (4.5 inches) | 69% | high |
November Weather | 10°C (51°F) | 76 mm (3.0 inches) | 82% | moderate |
December Weather | 8°C (47°F) | 90 mm (3.5 inches) | 87% | moderate |