Sun Valley Snow Report and Forecast
Snow Forecast for Sun Valley
When will there be fresh snow?
This is the Snow Forecast for Sun Valley, United States for 15 days from 16 May.
Updated 16 May 2025 06:33 AEST.
| Next Snow? | |
|---|---|
| There is no snow currently in the forecast for Sun Valley. | |
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For Forecast detail, see below.
For current snow depths and skiing conditions, see our Current Snow Report for Sun Valley.
Forecast for today in Sun Valley
Max 12℃
Min 3℃
Valley temperatures from an overnight low of 3℃ to daytime highs around 12℃
Freeze-thaw conditions up high.
Temperature at BaseTemp at Base
Fri
16
Snow unlikely
Clear sky early, then cloudy later.
Sun Valley has very light new snow forecast in the next 48 hours.
Sun Valley Snow Report
| Upper Snow Depths |
| - |
| Lower Snow Depths |
| - |
| Snow Conditions |
| - |
Sun Valley 7-Day Snow Forecast Overview
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| Fri 16 | Sat 17 | Sun 18 | Mon 19 | Tue 20 | Wed 21 | Thu 22 | |
|---|---|---|---|---|---|---|---|
| Wind | W F2 | SE F2 | SW F2 | ||||
| 2,790m | 5℃
| 6℃
| 2℃
 | 5℃
 | 9℃
 | 12℃
| 12℃
|
| W F2 | SW F2 | SW F2 | W F2 | ||||
| 2,270m | 8℃
| 8℃
| 5℃
| 11℃
 | 14℃
| 17℃
| 17℃
|
| SE F2 | SW F3 | SW F2 | SW F2 | SE F2 | W F2 | ||
| 1,750m | 12℃
| 13℃
| 9℃
 | 12℃
| 17℃
| 21℃
| 21℃
|
| Snow Line | varying 2,299m | ||||||
| Max Town | 12℃ | 13℃ | 9℃ | 12℃ | 17℃ | 21℃ | 21℃ |
| Min Town | 3℃ | 2℃ | 4℃ | 0℃ | 3℃ | 6℃ | 4℃ |
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.
Sun Valley Medium-Range (7-Day) Snow Forecast Detail
Note :- Mountain weather is extremely dynamic; the forecast below will change. Any forecast snow may move forward or back in the forecast, and predicted snowfall depths will be revised in subsequent updates.
Max 12℃
Min 3℃
Valley temperatures from an overnight low of 3℃ to daytime highs around 12℃
Freeze-thaw conditions up high.
Temperature at BaseTemp at Base
Fri
16
Snow unlikely
Clear sky early, then cloudy later.
Max 13℃
Min 2℃
Valley temperatures from an overnight low of 2℃ to daytime highs around 13℃
Freeze-thaw conditions up high.
Temperature at BaseTemp at Base
Sat
17
Snow unlikely
Cloudy.
Max 9℃
Min 4℃
Valley temperatures from an overnight low of 4℃ to daytime highs around 9℃
Freeze-thaw conditions up high.
Temperature at BaseTemp at Base
Snowfall per hour
Snow Line
Sun
18
Snow unlikely
Rain showers, light drizzle, cloudy later.
Max 12℃
Min 0℃
Valley temperatures from an overnight low of 0℃ to daytime highs around 12℃
Freeze-thaw from mid-mountain up.
Temperature at BaseTemp at Base
Mon
19
Snow unlikely
Cloudy.
Max 17℃
Min 3℃
Valley temperatures from an overnight low of 3℃ to daytime highs around 17℃
Freeze-thaw conditions up high.
Temperature at BaseTemp at Base
Tue
20
Snow unlikely
Cloudy early, then clear sky later.
Max 21℃
Min 6℃
Valley temperatures from an overnight low of 6℃ to daytime highs around 21℃
Freeze-thaw conditions up high.
Temperature at BaseTemp at Base
Wed
21
Snow unlikely
Clear sky early, then fair later.
Max 21℃
Min 4℃
Valley temperatures from an overnight low of 4℃ to daytime highs around 21℃
Freeze-thaw conditions up high.
Temperature at BaseTemp at Base
Thu
22
Snow unlikely
Clear spells early, then clear sky later.
No significant snowfall is forecast for this period.
This Snow Forecast for Sun Valley, United States gives the predicted Snowfall and Freezing Levels for the next week.
The forecast snowfall depths given are the likely average accumulations for the Lower and Upper slopes. The actual snow depth in Sun Valley, on any given piste or itinerary, may be dramatically different, particularly if the snowfall is accompanied by high winds and/or varying air temperatures.
Snow Forecasts beyond two days ahead are subject to significant change and variable reliability.
Sun Valley Snow Forecast updated at 06:33 AEST, next update expected imminently.
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.