Sun Valley is open in December with most terrain and lifts running. Conditions are generally solid, and the mountain offers a good balance of snow quality and crowd levels. This is a popular month for skiing without the peak-period surcharges.
45cm
Avg Snowfall
-2°C
Avg High (28°F)
-12°C
Avg Low (10°F)
18"
Snowfall (inches)
In December, Sun Valley sees an average of 45cm (18 inches) of snowfall. Daytime temperatures typically reach -2°C (28°F) with overnight lows around -12°C (10°F). Standard ski layering works well at these temperatures. A good quality insulated jacket, waterproof gloves, and neck protection will keep you comfortable.
Crowd Level
Day Pass Price
$209
December is one of the busiest periods at Sun Valley. Expect longer lift lines, especially mid-morning and after lunch. To beat the crowds, arrive at opening, ski the less popular sides of the mountain first, and consider midweek visits. Day pass prices reflect peak demand at $209.
In December, Sun Valley typically has strong trail coverage with most runs operational. Snow quality is generally consistent, and grooming keeps the primary runs in good shape.