Last updated: March 2, 2024
The weather in North Myrtle Beach, United States, during September is characterized by an average temperature of 25°C (78°F). Highs can soar to 31°C (88°F), while lows may dip to 18°C (65°F). Typically, the humidity level in North Myrtle Beach throughout September hovers around 81%.
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Average temperature
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Humidity
In September, North Myrtle Beach averages 187 mm (7.4 inches) of rainfall, typically over the course of 12 rainy days. The month enjoys an average of 12 hours 20 minutes of daylight, with the sun shining for approximately 9 hours 55 minutes each day. Additionally, there is a 54% probability of sunny days during this period.
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In September, the UV Index in North Myrtle Beach reaches a maximum of 9, 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 | 1 | 2 | 4 | 7 | 8 | 9 | 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 | ||||||