Last updated: June 24, 2025
In August, the average temperature in Charleston, United States hovers around 23°C (74°F), offering a pleasant climate for outdoor activities. Expect minimum temperatures to dip to 13°C (55°F), while highs can reach up to 34°C (93°F). With 114 mm (4.5 in) of precipitation spread across about 15 days, don’t forget your umbrella! The average humidity is a comfortable 73%, ensuring a refreshing atmosphere throughout the month.
In August in Charleston, the average temperature is 23°C (74°F). Maximum temperatures can reach 34°C (93°F), while minimums can drop to as low as 13°C (55°F). This pleasant climate makes Charleston an ideal destination for travelers seeking a comfortable and enjoyable experience during their visit.
In Charleston in August, the precipitation amount is 114 mm (4.5 in) spread over a duration of 15 days.
In Charleston in August, humidity is 73%. With an average temperature of 23°C (74°F), this humidity feels like a warm, enveloping blanket, making traveling a bit sweaty and heavy, but still pleasant if you stay hydrated and take breaks in the shade.
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 | 2°C (37°F) | 101 mm (4.0 inches) | 88% | moderate |
February Weather | 5°C (42°F) | 152 mm (6.0 inches) | 88% | moderate |
March Weather | 9°C (48°F) | 119 mm (4.7 inches) | 88% | high |
April Weather | 13°C (56°F) | 134 mm (5.3 inches) | 86% | very high |
May Weather | 19°C (66°F) | 159 mm (6.3 inches) | 82% | very high |
June Weather | 22°C (72°F) | 154 mm (6.1 inches) | 84% | very high |
July Weather | 25°C (77°F) | 124 mm (4.9 inches) | 82% | very high |
August Weather | 23°C (74°F) | 114 mm (4.5 inches) | 73% | very high |
September Weather | 21°C (70°F) | 103 mm (4.0 inches) | 73% | very high |
October Weather | 16°C (61°F) | 117 mm (4.6 inches) | 81% | high |
November Weather | 8°C (46°F) | 78 mm (3.1 inches) | 89% | moderate |
December Weather | 5°C (41°F) | 124 mm (4.9 inches) | 86% | moderate |