Sun Valley 7-Day Snow Forecast

Sun Valley Long-Range Snow Forecast Updated today

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Updated 01 November 2026 04:48 AEDT

Long-Range Snow Forecast for Sun Valley

Long-range (14 to 45 days) from 31 October.

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?
There is no snow currently in the forecast for Sun Valley.

Long-range Snow Outlook for Sun Valley

Snowfall

Snow Line

Max 11℃
Min 0℃

6cm New Snow

Snow Line from 2,549m to 2,279m, 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
Sat 31	up to 2cm New Snow Cloudy. Snow Line from 2,409m to 2,369m, with rain below.	Max 7℃ Min 5℃
Sun 01	up to 4cm New Snow Light snow at altitude, light drizzle below. Snow Line from 2,549m to 2,279m, with rain below.	Max 9℃ Min 4℃
Mon 02	Clear sky.	Max 10℃ Min 0℃
Tue 03	Cloudy.	Max 10℃ Min 1℃
Wed 04	Cloudy.	Max 11℃ Min 2℃
Thu 05	Clear sky.	Max 11℃ Min 1℃
Fri 06	Cloudy.	Max 10℃ Min 0℃

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 trail 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 04:48 AEDT, next update expected 10:00 AEDT.

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.