Sun ValleyWeather & Snow Report
Sun Valley in Idaho sits at an elevation of 9,150 feet and receives an average of 159 inches of snow annually across 79 snow days. The area also enjoys approximately 249 sunny days per year. The ski season runs November - April, with the best conditions typically found in December and January and February and March.
Monthly Weather Charts
Monthly Snowfall (inches)
Temperature Range (°F)
Monthly Breakdown
| Month | High (°F) | Low (°F) | Snowfall (in) | Snow Days | Sunny Days |
|---|---|---|---|---|---|
| January | 28° | 5° | 30" | 14 | 16 |
| February | 32° | 8° | 26" | 12 | 16 |
| March | 39° | 15° | 28" | 13 | 18 |
| April | 48° | 24° | 16" | 8 | 19 |
| May | 58° | 32° | 4" | 2 | 22 |
| June | 68° | 39° | -- | -- | 25 |
| July | 79° | 45° | -- | -- | 28 |
| August | 78° | 43° | -- | -- | 28 |
| September | 66° | 35° | 1" | 1 | 25 |
| October | 52° | 25° | 6" | 4 | 21 |
| November | 36° | 14° | 20" | 11 | 16 |
| December | 28° | 6° | 28" | 14 | 15 |
Best Time to Ski at Sun Valley
Based on snowfall data, the best months to ski at Sun Valley are December and January and February and March. During this period, the resort averages 25 inches of snowfall per month.
January is typically the snowiest month, with an average of 30 inches of snowfall and 14 snow days. Temperatures during peak season range from a high of 28°F to a low of 5°F.
For the best combination of snow quality and manageable crowds, consider visiting in January or February on weekdays. March often brings spring skiing conditions with warmer temperatures and longer days, making it ideal for those who prefer milder weather.
Packing Tips by Season
Early Season (Nov-Dec)
- Heavy insulated ski jacket
- Thermal base layers (top and bottom)
- Insulated ski pants
- Warm ski gloves or mittens
- Balaclava or neck gaiter
- Goggles with low-light lens
- Hand and toe warmers
Peak Season (Jan-Feb)
- Warmest ski jacket available
- Multiple base layer options
- Midlayer fleece or down
- Waterproof ski pants
- Insulated boots
- Helmet with ear coverage
- SPF 50+ sunscreen (high altitude)
Spring Skiing (Mar-Apr)
- Lighter shell jacket
- Breathable base layers
- Lighter ski pants
- Thinner gloves or spring gloves
- High-SPF sunscreen (essential)
- Goggles with high-light lens
- T-shirt for warm afternoon runs