Last updated: March 2, 2024
The weather in Charleston, United States, during August is characterized by an average temperature of 25°C (78°F). Highs can soar to 34°C (94°F), while lows may dip to 15°C (59°F). Typically, the humidity level in Charleston throughout August hovers around 76%.
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Average temperature
Maximum temperature
Humidity
In August, Charleston averages 102 mm (4.0 inches) of rainfall, typically over the course of 10 rainy days. The month enjoys an average of 13 hours 29 minutes of daylight, with the sun shining for approximately 10 hours 24 minutes each day. Additionally, there is a 50% probability of sunny days during this period.
Precipitation
Rainy days
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Chance of sun
In August, the UV Index in Charleston reaches a maximum of 10, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 15 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 1 | 2 | 3 | 5 | 7 | 9 | 10 | 9 | 7 | 5 | 3 | 1 | 1 |
| Exposure | Low | Moderate | High | VeryHigh | High | Moderate | Low | ||||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 25 min | 30 min | 45 min | ||||||