Death Valley National Park weather in September
September in Death Valley National Park: warm, dry, with clean air — an excellent time to visit.
#5 of 12 months in Death Valley National Park · #163 of 604 destinations to visit in September · comfort 86/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Death Valley National Park climate normals — September
| Daytime high | 29°C / 84°F | 🌤 warm |
|---|---|---|
| Nighttime low | 17°C / 63°F | |
| Feels like (high) | 26°C / 79°F | |
| Rainfall | 3 mm / 0.1 in | ☀️ dry |
| Rainy days | 1 days | |
| Humidity | 26% | 🌵 dry |
| Dew point | 0°C / 33°F | |
| Sunshine | 11.4 h/day | |
| Daylight | 12.4 h | |
| Wind | 8 km/h / 5 mph | |
| Air quality (US AQI) | 47 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Death Valley National Park in September — FAQ
- Is September a good time to visit Death Valley National Park?
- September in Death Valley National Park: warm, dry, with clean air — an excellent time to visit. It ranks #5 of 12 months for Death Valley National Park on SeasonMap's comfort score (86/100).
- What is the weather like in Death Valley National Park in September?
- In September, Death Valley National Park averages a daily high of 29°C and a low of 17°C, with about 3 mm of rain over roughly 0.8 rainy days.
- What is the air quality in Death Valley National Park in September?
- Death Valley National Park has a mean US Air Quality Index of about 47 in September.