Myrtle Beach weather in September
September in Myrtle Beach: hot, soaked, with very humid — an excellent time to visit.
#5 of 12 months in Myrtle Beach · #309 of 604 destinations to visit in September · comfort 80/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Myrtle Beach climate normals — September
| Daytime high | 28°C / 82°F | 🥵 hot |
|---|---|---|
| Nighttime low | 22°C / 71°F | |
| Feels like (high) | 31°C / 88°F | |
| Rainfall | 155 mm / 6.1 in | ⛈ soaked |
| Rainy days | 12 days | |
| Humidity | 76% | 💦 very humid |
| Dew point | 19°C / 67°F | |
| Sunshine | 10 h/day | |
| Daylight | 12.4 h | |
| Wind | 16 km/h / 10 mph | |
| Air quality (US AQI) | 51 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Myrtle Beach in September — FAQ
- Is September a good time to visit Myrtle Beach?
- September in Myrtle Beach: hot, soaked, with very humid — an excellent time to visit. It ranks #5 of 12 months for Myrtle Beach on SeasonMap's comfort score (80/100).
- What is the weather like in Myrtle Beach in September?
- In September, Myrtle Beach averages a daily high of 27.5°C and a low of 21.7°C, with about 154.5 mm of rain over roughly 11.8 rainy days.
- What is the air quality in Myrtle Beach in September?
- Myrtle Beach has a mean US Air Quality Index of about 51 in September.