Redwood National Park weather in September
September in Redwood National Park: nice, a little rain, with clean air — an excellent time to visit.
#4 of 12 months in Redwood National Park · #101 of 604 destinations to visit in September · comfort 89/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Redwood National Park climate normals — September
| Daytime high | 21°C / 69°F | 😎 nice |
|---|---|---|
| Nighttime low | 13°C / 55°F | |
| Feels like (high) | 20°C / 68°F | |
| Rainfall | 49 mm / 1.9 in | 🌦 some rain |
| Rainy days | 5 days | |
| Humidity | 78% | 💦 very humid |
| Dew point | 12°C / 53°F | |
| Sunshine | 10.9 h/day | |
| Daylight | 12.5 h | |
| Wind | 15 km/h / 9 mph | |
| Air quality (US AQI) | 45 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Redwood National Park?
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Redwood National Park in September — FAQ
- Is September a good time to visit Redwood National Park?
- September in Redwood National Park: nice, a little rain, with clean air — an excellent time to visit. It ranks #4 of 12 months for Redwood National Park on SeasonMap's comfort score (89/100).
- What is the weather like in Redwood National Park in September?
- In September, Redwood National Park averages a daily high of 20.8°C and a low of 12.6°C, with about 49.4 mm of rain over roughly 5 rainy days.
- What is the air quality in Redwood National Park in September?
- Redwood National Park has a mean US Air Quality Index of about 45 in September.