North Cascades National Park weather in December
December in North Cascades National Park: freezing, soaked, with clean air — one of the weakest months to visit.
#12 of 12 months in North Cascades National Park · #588 of 604 destinations to visit in December · comfort 27/100 (tier F)
Updated June 2026 · climate normals from ERA5 reanalysis
North Cascades National Park climate normals — December
| Daytime high | -7°C / 20°F | 🥶 freezing |
|---|---|---|
| Nighttime low | -12°C / 11°F | |
| Feels like (high) | -10°C / 14°F | |
| Rainfall | 280 mm / 11 in | ⛈ soaked |
| Rainy days | 20 days | |
| Humidity | 86% | 💦 very humid |
| Dew point | -12°C / 11°F | |
| Sunshine | 3.4 h/day | |
| Daylight | 8.3 h | |
| Wind | 7 km/h / 4 mph | |
| Snowfall | 269 cm / 105.9 in | |
| Air quality (US AQI) | 37 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is North Cascades National Park?
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North Cascades National Park in December — FAQ
- Is December a good time to visit North Cascades National Park?
- December in North Cascades National Park: freezing, soaked, with clean air — one of the weakest months to visit. It ranks #12 of 12 months for North Cascades National Park on SeasonMap's comfort score (27/100).
- What is the weather like in North Cascades National Park in December?
- In December, North Cascades National Park averages a daily high of -6.7°C and a low of -11.9°C, with about 279.7 mm of rain over roughly 19.6 rainy days.
- What is the air quality in North Cascades National Park in December?
- North Cascades National Park has a mean US Air Quality Index of about 37 in December.
- Does it snow in North Cascades National Park in December?
- North Cascades National Park sees roughly 269 cm of snowfall in December.