Arches National Park weather in August
August in Arches National Park: hot, dry, with clean air — a good time to visit.
#11 of 12 months in Arches National Park · #480 of 604 destinations to visit in August · comfort 61/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Arches National Park climate normals — August
| Daytime high | 34°C / 93°F | 🥵 hot |
|---|---|---|
| Nighttime low | 19°C / 66°F | |
| Feels like (high) | 32°C / 90°F | |
| Rainfall | 22 mm / 0.9 in | ☀️ dry |
| Rainy days | 3 days | |
| Humidity | 35% | 🌵 dry |
| Dew point | 8°C / 46°F | |
| Sunshine | 12.5 h/day | |
| Daylight | 13.6 h | |
| Wind | 15 km/h / 10 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 Arches National Park?
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Arches National Park in August — FAQ
- Is August a good time to visit Arches National Park?
- August in Arches National Park: hot, dry, with clean air — a good time to visit. It ranks #11 of 12 months for Arches National Park on SeasonMap's comfort score (61/100).
- What is the weather like in Arches National Park in August?
- In August, Arches National Park averages a daily high of 33.9°C and a low of 18.7°C, with about 22.3 mm of rain over roughly 3 rainy days.
- What is the air quality in Arches National Park in August?
- Arches National Park has a mean US Air Quality Index of about 43 in August.