Congaree National Park weather in September
September in Congaree National Park: hot, a little rain, with clean air — a great time to visit.
#9 of 12 months in Congaree National Park · #391 of 604 destinations to visit in September · comfort 73/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Congaree National Park climate normals — September
| Daytime high | 29°C / 84°F | 🥵 hot |
|---|---|---|
| Nighttime low | 20°C / 69°F | |
| Feels like (high) | 32°C / 90°F | |
| Rainfall | 79 mm / 3.1 in | 🌦 some rain |
| Rainy days | 9 days | |
| Humidity | 71% | 💧 humid |
| Dew point | 18°C / 64°F | |
| Sunshine | 9.8 h/day | |
| Daylight | 12.4 h | |
| Wind | 14 km/h / 9 mph | |
| Air quality (US AQI) | 43 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Congaree National Park?
Loading map…
Congaree National Park in September — FAQ
- Is September a good time to visit Congaree National Park?
- September in Congaree National Park: hot, a little rain, with clean air — a great time to visit. It ranks #9 of 12 months for Congaree National Park on SeasonMap's comfort score (73/100).
- What is the weather like in Congaree National Park in September?
- In September, Congaree National Park averages a daily high of 29.1°C and a low of 20.3°C, with about 78.8 mm of rain over roughly 8.8 rainy days.
- What is the air quality in Congaree National Park in September?
- Congaree National Park has a mean US Air Quality Index of about 43 in September.