December in Yellowstone National Park is a tough month: highs around 28°F, lows around 10°F. Crowds: very quiet — #8 busiest of the park's 12 months. Winter season opens mid-December — guided oversnow access. The editorial best window here is June & September.
| Verdict | Tough Closures, harsh weather or very limited access — plan carefully. |
|---|---|
| Temps °F | 28° high / 10° low |
| Crowds | very quiet · #8 busiest of the park's 12 months |
| What December is like | Winter season opens mid-December — guided oversnow access |
| Best window (whole year) | June & September |
| Peak crowds (whole year) | Jul–Aug |
CROWDS: RELATIVE SEASONALITY FROM NPS VISITATION STATISTICS · TEMPS: APPROXIMATE NOAA NORMALS AT MAIN VISITOR ELEVATION — HIGH COUNTRY RUNS 10–20°F COLDER
Yellowstone National Park in January — Tough, highs around 28°F, crowds: very quiet (interior roads closed to cars — snowcoach and ski access only).
Our verdict for December is "Tough". Closures, harsh weather or very limited access — plan carefully. Expect highs around 28°F and lows around 10°F, with crowds at the "very quiet" level. Temperatures are approximate NOAA normals at the main visitor elevation; crowd levels follow published NPS visitation statistics.
Across the full 12-month review, the best window is June & September, and the peak-crowd months are Jul–Aug. December itself we rate "Tough".
Get a heads-up before timed-entry and lottery windows open — plus new guides for the parks you care about.
FREE · NO SPAM · UNSUBSCRIBE IN ONE TAP