Sun Valley 7-Day Snow Forecast

Sun Valley Long-Range Snow Forecast Updated today

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Updated 09 November 2026 18:42 UTC

Long-Range Snow Forecast for Sun Valley

Long-range (14 to 45 days) from 9 November.

For Forecast detail, see below.

Sun Valley Snow Forecast Highlights

When will there be fresh snow in Sun Valley?

Sun Valley Snow Forecast Highlights - GFS
Snowfall prediction at mid-mountain (2,270m)
Next Snow Expected	16 November
Next Snow Amount	11cm 4in
Next 48 Hours	- -
Next 7 Days	11cm 4in

Long-range Snow Outlook for Sun Valley

Snowfall

Snow Line

Max 15℃ 59°F
Min -3℃ 26°F

4cm 2in New Snow

Snow Line from 2,489m 8,166ft to 2,149m 7,051ft , with rain below.

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Sun Valley Long-Range (2 weeks+) Snow Forecast Outlook

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.

16 Day Weather and Snow Forecast for Sun Valley from OpenMeteo(GFS)
	Snow and Weather	Temp Town
Mon 09	Cloudy.	Max 12℃ 53°F Min 0℃ 32°F
Tue 10	Clear sky.	Max 13℃ 55°F Min 3℃ 37°F
Wed 11	Cloudy at altitude, clear sky below.	Max 15℃ 59°F Min 5℃ 40°F
Thu 12	Cloudy.	Max 16℃ 60°F Min 6℃ 42°F
Fri 13	Cloudy.	Max 12℃ 54°F Min 4℃ 40°F
Sat 14	up to 3cm up to 1in New Snow Light snow showers at altitude, light rain showers below. Snow Line from 2,159m 7,083ft to 2,119m 6,952ft , with rain below.	Max 9℃ 48°F Min 2℃ 36°F
Sun 15	up to 11cm up to 4in New Snow Light snow at altitude, light rain below. Snow Line from 2,539m 8,330ft to 2,109m 6,919ft , with rain below.	Max 5℃ 40°F Min 3℃ 38°F

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 18:42 UTC, next update expected 00:00 UTC.

Ensemble forecast for Sun Valley, USA at 1,750m

Daily Mean Temperature (yellow line is control)

Daily Total Precipitation (blue line is control)

What are Forecast Ensembles ? Multiple forecasts from running the same weather model with slightly different inputs. The prominent line (the 'control') is the model output from standard inputs, the thinner lines are the variations. Plotted together, they show a range of possible outcomes; the closer they are, the higher the confidence.

How to read Long Range Ensemble Forecasts

These forecasts are from ECMWF EC46, a long-range, low-resolution (area) model. They may not accurately reflect local conditions and should be read as area forecasts, indicating whether the coming weeks are likely to be warmer, colder, wetter, or drier than average.

What to look for?

Temperatures trending downward at the same time as precipitation spikes upward... means snow!

Lines close together indicate a high confidence, while wider spreads signal uncertainty.

United States Accommodation (Apartments, Chalets, Hotels) Map

How reliable is the snow in Sun Valley?

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.

Off-Piste Safety in Sun Valley

Before skiing or snowboarding off-piste in Sun Valley, you must assess the local snow conditions. Always check the local Avalanche Risk Level and ski with appropriate safety equipment.