Last updated: March 2, 2024
The weather in Charlestown, United States, during August is characterized by an average temperature of 25°C (78°F). Highs can soar to 33°C (91°F), while lows may dip to 18°C (64°F). Typically, the humidity level in Charlestown throughout August hovers around 72%.
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Average temperature
Maximum temperature
Humidity
In August, Charlestown averages 133 mm (5.2 inches) of rainfall, typically over the course of 14 rainy days. The month enjoys an average of 13 hours 38 minutes of daylight, with the sun shining for approximately 10 hours 18 minutes each day. Additionally, there is a 34% probability of sunny days during this period.
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Chance of sun
In August, the UV Index in Charlestown reaches a maximum of 9, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, 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 | 1 | 3 | 5 | 7 | 9 | 9 | 9 | 7 | 5 | 3 | 2 | 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 | ||||||