December is a tough month at Mount Rainier — it ranks 12th of the twelve here. Expect about 95% fewer visitors than July, the park's peak — 19,405 visits on average. Days run around 33°F by afternoon and 22°F at night, with 8.6 hours of daylight.
December against the park's best
| Month | Verdict | Avg. visits | vs. peak | High | Low | Snow | Daylight |
|---|---|---|---|---|---|---|---|
| December (this page) | Tough | 19,405 | −95% | 33°F | 22°F | — | 8.6 h |
| May (best) | Excellent | 85,473 | −80% | 48°F | 33°F | — | 15 h |
| July (peak crowds) | Good | 420,918 | peak | 62°F | 44°F | — | 15.5 h |
Weather figures are for the Paradise area (5,400 ft) — the Rainier Paradise RS 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 Mount Rainier?
It is the tough season — doable with preparation, but the numbers say most people should pick another month. December ranks 12 of 12 at Mount Rainier on crowds, weather, daylight, and access together.
How crowded is Mount Rainier in December?
About 19,405 recreation visits on average — 95% below July, the park's peak.
How warm is Mount Rainier in December?
Average highs around 33°F and lows around 22°F at the Rainier Paradise RS station.
← Mount Rainier in November · All months at Mount Rainier · Mount Rainier in January →