SeasonScore
Grand Canyon, United States
Photo: Chensiyuan · CC BY-SA 4.0

United States

Grand Canyon in December

🧥 Winter

Cool and mostly dry.

🎒 Pack: warm jacket for evenings

Best months: May (9.6), Oct (9.6), Apr (9.5)

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Why December scores 8.9What goes into the score

How it works
🌡️ 13° / 2°C🌧️ 25 mm💧 dew pt -6°🍃 PM2.5 3
  • Weather comfort8.3
    • !Cool (13.3°C highs / 2.3°C lows)
    • ✓Comfortable humidity (dew point -5.7°C)
    • ✓Mostly dry (~25 mm rain)
  • Air quality10.0
    • ✓Good (within WHO guideline) (PM2.5 ~3 µg/m³)
  • Seasonal hazards10.0
    • ·No notable seasonal hazards
  • Safety baseline7.5
    • ·Increased caution
Compare monthsPut December side by side with another month
DecMay
Score8.9 Excellent9.6 Excellent
Season🧥 Winter🌷 Spring
High / low13° / 2°29° / 13°
Rain25 mm14 mm
Humiditydew pt -6°dew pt 0°
PM2.53 µg/m³5 µg/m³

Typical-month data: NASA POWER (MERRA-2 reanalysis) 2015–2024 (modelled, not a forecast).

Holidays & crowdsDecember 2026

Long weekend

There's at least one long weekend. Domestic travel picks up and popular spots get busier over those days.

  • Christmas Day 25–27 Dec · 3 days off in a row

National holidays only; regional holidays and school breaks aren't included. Source: holidays (open-source public-holiday calendar).

Explore Grand CanyonEvents, sights, food & souvenirs

Check event dates locally

A vast canyon in northern Arizona carved by the Colorado River, visited for its viewpoints, rim walks and challenging hikes into the gorge.

Events in December

No major events on our calendar for December.

Coming up later

Grand Canyon Star PartyDate variesUsually June

Amateur astronomers set up telescopes for free public night-sky viewing over a week.

Why go: Dark skies are a highlight; bring warm layers, as rims are cold at night.

Where: South Rim and North Rim

Monsoon seasonDate variesUsually July to mid-September

Afternoon thunderstorms bring lightning, flash floods and dramatic skies.

Why go: Stay away from rim edges in lightning and be cautious in side canyons.

Where: Throughout the park