Olympic National Park weather in August
August in Olympic National Park: nice, dry, with clean air — one of the best months to visit.
#1 of 12 months in Olympic National Park · #1 of 604 destinations to visit in August · comfort 97/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Olympic National Park climate normals — August
| Daytime high | 20°C / 67°F | 😎 nice |
|---|---|---|
| Nighttime low | 9°C / 48°F | |
| Feels like (high) | 19°C / 66°F | |
| Rainfall | 29 mm / 1.2 in | ☀️ dry |
| Rainy days | 6 days | |
| Humidity | 65% | 💧 humid |
| Dew point | 7°C / 45°F | |
| Sunshine | 12 h/day | |
| Daylight | 14.2 h | |
| Wind | 9 km/h / 5 mph | |
| Air quality (US AQI) | 31 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Olympic National Park?
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Olympic National Park in August — FAQ
- Is August a good time to visit Olympic National Park?
- August in Olympic National Park: nice, dry, with clean air — one of the best months to visit. It ranks #1 of 12 months for Olympic National Park on SeasonMap's comfort score (97/100).
- What is the weather like in Olympic National Park in August?
- In August, Olympic National Park averages a daily high of 19.7°C and a low of 9.1°C, with about 29.4 mm of rain over roughly 6.4 rainy days.
- What is the air quality in Olympic National Park in August?
- Olympic National Park has a mean US Air Quality Index of about 31 in August.