Mount Rainier National Park weather in January
January in Mount Rainier National Park: freezing, soaked, with clean air — one of the weakest months to visit.
#11 of 12 months in Mount Rainier National Park · #555 of 604 destinations to visit in January · comfort 34/100 (tier F)
Updated June 2026 · climate normals from ERA5 reanalysis
Mount Rainier National Park climate normals — January
| Daytime high | -5°C / 23°F | 🥶 freezing |
|---|---|---|
| Nighttime low | -10°C / 13°F | |
| Feels like (high) | -9°C / 16°F | |
| Rainfall | 268 mm / 10.5 in | ⛈ soaked |
| Rainy days | 20 days | |
| Humidity | 81% | 💦 very humid |
| Dew point | -11°C / 12°F | |
| Sunshine | 4.5 h/day | |
| Daylight | 9 h | |
| Wind | 12 km/h / 8 mph | |
| Snowfall | 147.8 cm / 58.2 in | |
| Air quality (US AQI) | 34 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Mount Rainier National Park in January — FAQ
- Is January a good time to visit Mount Rainier National Park?
- January in Mount Rainier National Park: freezing, soaked, with clean air — one of the weakest months to visit. It ranks #11 of 12 months for Mount Rainier National Park on SeasonMap's comfort score (34/100).
- What is the weather like in Mount Rainier National Park in January?
- In January, Mount Rainier National Park averages a daily high of -4.8°C and a low of -10.3°C, with about 267.8 mm of rain over roughly 19.8 rainy days.
- What is the air quality in Mount Rainier National Park in January?
- Mount Rainier National Park has a mean US Air Quality Index of about 34 in January.
- Does it snow in Mount Rainier National Park in January?
- Mount Rainier National Park sees roughly 147.8 cm of snowfall in January.