Great Sand Dunes National Park weather in December
December in Great Sand Dunes National Park: freezing, dry, with clean air — a good time to visit.
#10 of 12 months in Great Sand Dunes National Park · #349 of 604 destinations to visit in December · comfort 67/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Great Sand Dunes National Park climate normals — December
| Daytime high | 3°C / 37°F | 🥶 freezing |
|---|---|---|
| Nighttime low | -9°C / 17°F | |
| Feels like (high) | -1°C / 30°F | |
| Rainfall | 18 mm / 0.7 in | ☀️ dry |
| Rainy days | 4 days | |
| Humidity | 60% | 💧 humid |
| Dew point | -10°C / 13°F | |
| Sunshine | 8.1 h/day | |
| Daylight | 9.6 h | |
| Wind | 11 km/h / 7 mph | |
| Snowfall | 13.7 cm / 5.4 in | |
| Air quality (US AQI) | 38 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Great Sand Dunes National Park in December — FAQ
- Is December a good time to visit Great Sand Dunes National Park?
- December in Great Sand Dunes National Park: freezing, dry, with clean air — a good time to visit. It ranks #10 of 12 months for Great Sand Dunes National Park on SeasonMap's comfort score (67/100).
- What is the weather like in Great Sand Dunes National Park in December?
- In December, Great Sand Dunes National Park averages a daily high of 2.7°C and a low of -8.6°C, with about 17.5 mm of rain over roughly 4 rainy days.
- What is the air quality in Great Sand Dunes National Park in December?
- Great Sand Dunes National Park has a mean US Air Quality Index of about 38 in December.
- Does it snow in Great Sand Dunes National Park in December?
- Great Sand Dunes National Park sees roughly 13.7 cm of snowfall in December.