Rocky Mountain National Park weather in August
August in Rocky Mountain National Park: nice, a little rain, with clean air — one of the best months to visit.
#1 of 12 months in Rocky Mountain National Park · #17 of 604 destinations to visit in August · comfort 94/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Rocky Mountain National Park climate normals — August
| Daytime high | 22°C / 71°F | 😎 nice |
|---|---|---|
| Nighttime low | 8°C / 46°F | |
| Feels like (high) | 20°C / 68°F | |
| Rainfall | 55 mm / 2.1 in | 🌦 some rain |
| Rainy days | 14 days | |
| Humidity | 65% | 💧 humid |
| Dew point | 7°C / 44°F | |
| Sunshine | 12.1 h/day | |
| Daylight | 13.7 h | |
| Wind | 12 km/h / 7 mph | |
| Air quality (US AQI) | 44 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Rocky Mountain National Park?
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Rocky Mountain National Park in August — FAQ
- Is August a good time to visit Rocky Mountain National Park?
- August in Rocky Mountain National Park: nice, a little rain, with clean air — one of the best months to visit. It ranks #1 of 12 months for Rocky Mountain National Park on SeasonMap's comfort score (94/100).
- What is the weather like in Rocky Mountain National Park in August?
- In August, Rocky Mountain National Park averages a daily high of 21.5°C and a low of 7.9°C, with about 54.6 mm of rain over roughly 13.8 rainy days.
- What is the air quality in Rocky Mountain National Park in August?
- Rocky Mountain National Park has a mean US Air Quality Index of about 44 in August.