Glacier Bay National Park weather in August
August in Glacier Bay National Park: cool, soaked, with clean air — a great time to visit.
#4 of 12 months in Glacier Bay National Park · #383 of 604 destinations to visit in August · comfort 73/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Glacier Bay National Park climate normals — August
| Daytime high | 11°C / 51°F | 🙂 cool |
|---|---|---|
| Nighttime low | 7°C / 45°F | |
| Feels like (high) | 10°C / 50°F | |
| Rainfall | 339 mm / 13.3 in | ⛈ soaked |
| Rainy days | 18 days | |
| Humidity | 91% | 💦 very humid |
| Dew point | 8°C / 46°F | |
| Sunshine | 8.3 h/day | |
| Daylight | 15.3 h | |
| Wind | 12 km/h / 8 mph | |
| Snowfall | 1.1 cm / 0.4 in | |
| Air quality (US AQI) | 27 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Glacier Bay National Park?
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Glacier Bay National Park in August — FAQ
- Is August a good time to visit Glacier Bay National Park?
- August in Glacier Bay National Park: cool, soaked, with clean air — a great time to visit. It ranks #4 of 12 months for Glacier Bay National Park on SeasonMap's comfort score (73/100).
- What is the weather like in Glacier Bay National Park in August?
- In August, Glacier Bay National Park averages a daily high of 10.8°C and a low of 7°C, with about 338.9 mm of rain over roughly 18.2 rainy days.
- What is the air quality in Glacier Bay National Park in August?
- Glacier Bay National Park has a mean US Air Quality Index of about 27 in August.
- Does it snow in Glacier Bay National Park in August?
- Glacier Bay National Park sees roughly 1.1 cm of snowfall in August.