Sun Valley 7-Day Snow Forecast

Sun Valley Long-Range Snow Forecast Updated today

ECMWF IFS

GEM

GFS

PROSubscribe to Switch Weather Model

Updated 01 July 2026 19:44 CDT

Long-Range Snow Forecast for Sun Valley

Long-range (14 to 45 days) from 2 July.

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 33℃
Min 10℃

Snow unlikely

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
Thu 02	Clear sky.	Max 25℃ Min 10℃
Fri 03	Cloudy.	Max 27℃ Min 12℃
Sat 04	Clear sky.	Max 29℃ Min 12℃
Sun 05	Clear sky.	Max 32℃ Min 15℃
Mon 06	Cloudy.	Max 33℃ Min 17℃
Tue 07	Clear spells at altitude, fair below.	Max 32℃ Min 15℃
Wed 08	Clear sky.	Max 32℃ Min 15℃

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 19:44 CDT, next update expected 01:00 CDT.

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

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.

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.