Mount Rainier National Park weather in October
October in Mount Rainier National Park: cold, rainy, with clean air — a good time to visit.
#6 of 12 months in Mount Rainier National Park · #486 of 604 destinations to visit in October · comfort 64/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Mount Rainier National Park climate normals — October
| Daytime high | 4°C / 40°F | 🧥 cold |
|---|---|---|
| Nighttime low | -4°C / 24°F | |
| Feels like (high) | 1°C / 34°F | |
| Rainfall | 143 mm / 5.6 in | 🌧 rainy |
| Rainy days | 13 days | |
| Humidity | 73% | 💧 humid |
| Dew point | -4°C / 25°F | |
| Sunshine | 7.4 h/day | |
| Daylight | 10.9 h | |
| Wind | 11 km/h / 7 mph | |
| Snowfall | 15.4 cm / 6.1 in | |
| Air quality (US AQI) | 31 | 🍃 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 October — FAQ
- Is October a good time to visit Mount Rainier National Park?
- October in Mount Rainier National Park: cold, rainy, with clean air — a good time to visit. It ranks #6 of 12 months for Mount Rainier National Park on SeasonMap's comfort score (64/100).
- What is the weather like in Mount Rainier National Park in October?
- In October, Mount Rainier National Park averages a daily high of 4.3°C and a low of -4.3°C, with about 143.3 mm of rain over roughly 13 rainy days.
- What is the air quality in Mount Rainier National Park in October?
- Mount Rainier National Park has a mean US Air Quality Index of about 31 in October.
- Does it snow in Mount Rainier National Park in October?
- Mount Rainier National Park sees roughly 15.4 cm of snowfall in October.