Glacier National Park weather in August
August in Glacier National Park: nice, a little rain, with clean air — one of the best months to visit.
#2 of 12 months in Glacier National Park · #26 of 604 destinations to visit in August · comfort 93/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Glacier National Park climate normals — August
| Daytime high | 22°C / 71°F | 😎 nice |
|---|---|---|
| Nighttime low | 10°C / 50°F | |
| Feels like (high) | 19°C / 66°F | |
| Rainfall | 49 mm / 1.9 in | 🌦 some rain |
| Rainy days | 8 days | |
| Humidity | 54% | 🍃 comfortable |
| Dew point | 5°C / 42°F | |
| Sunshine | 12 h/day | |
| Daylight | 14.3 h | |
| Wind | 15 km/h / 9 mph | |
| Snowfall | 0.2 cm / 0.1 in | |
| Air quality (US AQI) | 44 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Glacier National Park in August — FAQ
- Is August a good time to visit Glacier National Park?
- August in Glacier National Park: nice, a little rain, with clean air — one of the best months to visit. It ranks #2 of 12 months for Glacier National Park on SeasonMap's comfort score (93/100).
- What is the weather like in Glacier National Park in August?
- In August, Glacier National Park averages a daily high of 21.5°C and a low of 10°C, with about 48.8 mm of rain over roughly 7.6 rainy days.
- What is the air quality in Glacier National Park in August?
- Glacier National Park has a mean US Air Quality Index of about 44 in August.