Grand Teton National Park weather in August
August in Grand Teton National Park: nice, a little rain, with clean air — one of the best months to visit.
#2 of 12 months in Grand Teton National Park · #36 of 604 destinations to visit in August · comfort 92/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Grand Teton National Park climate normals — August
| Daytime high | 24°C / 76°F | 😎 nice |
|---|---|---|
| Nighttime low | 10°C / 49°F | |
| Feels like (high) | 22°C / 72°F | |
| Rainfall | 52 mm / 2 in | 🌦 some rain |
| Rainy days | 9 days | |
| Humidity | 62% | 💧 humid |
| Dew point | 8°C / 46°F | |
| Sunshine | 12 h/day | |
| Daylight | 13.9 h | |
| Wind | 13 km/h / 8 mph | |
| Air quality (US AQI) | 41 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Grand Teton National Park?
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Grand Teton National Park in August — FAQ
- Is August a good time to visit Grand Teton National Park?
- August in Grand Teton National Park: nice, a little rain, with clean air — one of the best months to visit. It ranks #2 of 12 months for Grand Teton National Park on SeasonMap's comfort score (92/100).
- What is the weather like in Grand Teton National Park in August?
- In August, Grand Teton National Park averages a daily high of 24.2°C and a low of 9.5°C, with about 51.7 mm of rain over roughly 8.8 rainy days.
- What is the air quality in Grand Teton National Park in August?
- Grand Teton National Park has a mean US Air Quality Index of about 41 in August.