Rocky Mountain in December: Crowds, Weather & What to Pack
Shoulder · VisitWhen score 57/100 · #12 of 12 months
December is a quiet month with trade-offs at Rocky Mountain National Park: crowds run 16% of the July peak (126,482 average visits). Weather: highs average 36°F and lows 16°F, with 0.7″ of precipitation and 9.3 hours of daylight. Roads and services are only partly open this month — see the access note below. Computed from NPS and NOAA data.
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Bring for Rocky Mountain in December
- Insulated parka + thermal base layersSee it on AmazonWhy: average lows of 16°F.
- Traction devices (microspikes) and gaitersSee it on AmazonWhy: 13″ normal snowfall.
- HeadlampSee it on AmazonWhy: only 9.3 hours of daylight in mid-December.
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Crowds in December
Rocky Mountain averages 126,482 recreation visits in December — 16% of what July, the peak month, draws — the third-quietest month of the year. Trailheads and parking fill accordingly — crowds are thin by this park's standards.
Weather & daylight
Days are cold (highs average 36°F), and nights are frigid (lows average 16°F). It is typically dry (0.7″ of precipitation). Normal snowfall is 13″ — expect snow on the ground. Mid-month daylight runs 9.3 hours.
NOAA 1991–2020 monthly normals, station ESTES PARK 3 SSE, CO US (9 mi from park coordinates, 7,812 ft elevation) — conditions vary inside the park, especially with elevation. Daylight computed for the 15th of December.
What to pack for Rocky Mountain in December
Computed from the month's weather normals above — not a generic list.
- Insulated parka + thermal base layers — average lows of 16°F
- Traction devices (microspikes) and gaiters — 13″ normal snowfall (compare other options)
- Headlamp — only 9.3 hours of daylight in mid-December (compare other options)
- Insulated, waterproof boots — plus navigation and a basic first-aid kit — 13″ of snow is normal this month
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If your dates are flexible, consider shifting: The computed best months for Rocky Mountain are March and April.
Also at their best in December
Other parks whose computed December verdict is a best window — same NPS × NOAA formula:
- American Samoa in December — 17% of peak crowds, highs 88°F, score 66/100
- Everglades in December — 72% of peak crowds, highs 80°F, score 64/100
- Biscayne in December — 77% of peak crowds, highs 80°F, score 62/100
Common questions
Is Rocky Mountain crowded in December?
No — December is one of the quieter months: 16% of the July peak, averaging 126,482 visits (NPS, 2021–2025).
What is the weather like in Rocky Mountain in December?
Average highs of 36°F, lows of 16°F, 0.7″ of precipitation (NOAA 1991–2020 normals, ESTES PARK 3 SSE, CO US station).
What should I pack for Rocky Mountain in December?
Insulated parka + thermal base layers; Traction devices (microspikes) and gaiters; Headlamp — the full weather-computed list is on this page.
Is everything open at Rocky Mountain in December?
Trail Ridge Road typically closes mid-October through late May; the Bear Lake corridor stays open year-round. Always check the park's live NPS alerts for current conditions.
See also: the best national parks to visit in December · Last verified 2026-09-24