December is a good month at Great Sand Dunes — it ranks 11th of the twelve here. Expect about 91% fewer visitors than June, the park's peak — 8,421 visits on average. Days run around 34°F by afternoon and 12°F at night, with 9.6 hours of daylight.
December against the park's best
| Month | Verdict | Avg. visits | vs. peak | High | Low | Snow | Daylight |
|---|---|---|---|---|---|---|---|
| December (this page) | Good | 8,421 | −91% | 34°F | 12°F | 7" | 9.6 h |
| April (best) | Excellent | 26,517 | −72% | 56°F | 29°F | 7.9" | 13.1 h |
| June (peak crowds) | Good | 94,559 | peak | 77°F | 48°F | 0" | 14.8 h |
Weather figures are for the visitor center area (about 8,200 ft) — the Great Sand Dunes NP & Preserve station. Visits are 2021–2025 averages; climate normals cover 1991–2020. Conditions vary across the park; check current status before you go.
Common questions
Is December a good time to visit Great Sand Dunes?
It is a reasonable month — the park has stronger ones, but the records don't argue against it. December ranks 11 of 12 at Great Sand Dunes on crowds, weather, daylight, and access together.
How crowded is Great Sand Dunes in December?
About 8,421 recreation visits on average — 91% below June, the park's peak.
How warm is Great Sand Dunes in December?
Average highs around 34°F and lows around 12°F at the Great Sand Dunes NP & Preserve station, with about 7 inches of snow across the month.
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