Olympic National Park weather in December
December in Olympic National Park: freezing, soaked, with clean air — one of the weakest months to visit.
#12 of 12 months in Olympic National Park · #554 of 604 destinations to visit in December · comfort 35/100 (tier F)
Updated June 2026 · climate normals from ERA5 reanalysis
Olympic National Park climate normals — December
| Daytime high | 0°C / 33°F | 🥶 freezing |
|---|---|---|
| Nighttime low | -4°C / 24°F | |
| Feels like (high) | -3°C / 27°F | |
| Rainfall | 366 mm / 14.4 in | ⛈ soaked |
| Rainy days | 21 days | |
| Humidity | 90% | 💦 very humid |
| Dew point | -4°C / 26°F | |
| Sunshine | 3.4 h/day | |
| Daylight | 8.5 h | |
| Wind | 10 km/h / 6 mph | |
| Snowfall | 111.4 cm / 43.9 in | |
| Air quality (US AQI) | 35 | 🍃 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 December — FAQ
- Is December a good time to visit Olympic National Park?
- December in Olympic National Park: freezing, soaked, with clean air — one of the weakest months to visit. It ranks #12 of 12 months for Olympic National Park on SeasonMap's comfort score (35/100).
- What is the weather like in Olympic National Park in December?
- In December, Olympic National Park averages a daily high of 0.3°C and a low of -4.5°C, with about 366 mm of rain over roughly 21.4 rainy days.
- What is the air quality in Olympic National Park in December?
- Olympic National Park has a mean US Air Quality Index of about 35 in December.
- Does it snow in Olympic National Park in December?
- Olympic National Park sees roughly 111.4 cm of snowfall in December.