Sun Valley Snow Report and Forecast
Updated 11 September 2026 23:47 PDT
Snow Forecast for Sun Valley
Snow and Weather from 12 September.
For Forecast detail, see below.
There is some snow in the long-range forecast (8 to 16 days from today)!
J2Ski - Sign In for a long-range snow forecast, with more weather detail.
Sun Valley Snow Forecast Highlights
When will there be fresh snow in Sun Valley?
| Next Snow Expected | 26 September |
|---|---|
| Next Snow Amount | - |
| Next 48 Hours | - |
| Next 7 Days | - |
Forecast for today in Sun Valley
Max 76°F
Min 49°F
Valley temperatures from an overnight low of 49°F to daytime highs around 76°F
Temperature at BaseTemp at Base
Sat
12
Snow unlikely
Clear sky early, then cloudy later.
Forecast times for Sun Valley are in Denver (US/Mountain) time zone.
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| Sat 12 | Sun 13 | Mon 14 | Tue 15 | Wed 16 | Thu 17 | Fri 18 | |
|---|---|---|---|---|---|---|---|
| Wind | SW F2 | W F3 | SE F2 | SE F2 | |||
| 9,154ft | 62°F
| 51°F
| 56°F
| 58°F
| 61°F
| 59°F
 | 66°F
|
| SW F2 | W F3 | SW F2 | W F2 | SW F2 | |||
| 7,448ft | 68°F
| 57°F
| 62°F
| 65°F
| 67°F
| 66°F
| 71°F
|
| SW F2 | SW F3 | SW F2 | W F2 | SW F2 | |||
| 5,741ft | 76°F
| 64°F
| 68°F
| 71°F
| 73°F
| 72°F
| 78°F
|
| Snow Line | |||||||
| Max Town | 76°F | 64°F | 68°F | 71°F | 73°F | 72°F | 78°F |
| Min Town | 49°F | 42°F | 38°F | 41°F | 48°F | 50°F | 50°F |
This table shows the average forecast snowfall, the maximum temperature, and expected general weather at resort, lower and upper mountain levels. For daily forecast details, see below.
United States Accommodation (Apartments, Chalets, Hotels) Map
Snow Reliability
Sun Valley typically enjoys a healthy snowpack, with average depths reaching up to 100 inches during the season. The resort's snow reliability is bolstered by consistent snowfall, making it essential to check J2Ski for the latest updates on conditions.
Understanding and predicting Snow Conditions in Sun Valley
Here are our tips for making the most of a trip to Sun Valley, with the help of the J2Ski Snow forecasts and reports. You can find some great skiing in Sun Valley, but like any mountain, snow conditions change throughout the season, from day to day, and even from hour to hour.
Whether you’re sticking to the marked pistes or venturing off-piste, here’s what you need to know:
Pistes (Groomers) or Off-Piste
These can be a world apart, regarding snow conditions, even ignoring the difference between the natural terrain features to be found off-piste and the generally controlled surfaces and slopes of a pisted (groomed) run.
- Piste Conditions can range from fresh powder to firm, icy surfaces, particularly after warm spells or a busy day on the mountain with the passage of many skiers.
- Off-Piste Conditions are far more variable. Wind and sun can quickly transform fresh snow into wind crust or slushy layers, whilst cold weather can preserve stashes of powder many days after a snowfall.
WARNING - skiing off-piste (out-of-bounds) at Sun Valley is not always controlled (slopes made safe from avalanche risk) or patrolled. Always check local advice, ski with safety kit (and know how to use it), and never ski alone.
Analyzing Weather and Snowfall Forecasts
Whilst no forecast can tell you exactly how snow conditions in Sun Valley will develop, checking the forecast regularly should give you an idea of what to expect.
New snowfall can bring fresh powder and refresh the surfaces of pisted runs. Powder can be tracked out quickly at busy times, but in less crowded and shaded areas, fresh snow can linger for days.
Changes in weather conditions, such as milder temperatures, rain or wind, can degrade snow quality. Conversely, cold, stable weather can preserve conditions for extended periods.
Predicting Future Snow Quality
Regularly check our snow and weather forecasts for Sun Valley for changes that may affect snow quality. Forecast snowfall depth and recent snowfall are good indicators of what to expect.
Use historical data and recent snow reports to understand past snow conditions and anticipate future changes.