Keystone 7-Day Snow Forecast

Keystone Long-Range Snow Forecast Updated today

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Updated 20 September 2026 02:41 PDT

Long-Range Snow Forecast for Keystone

Long-range (14 to 45 days) from 20 September.

For Forecast detail, see below.

Keystone Snow Forecast Highlights

When will there be fresh snow in Keystone?

Keystone Snow Forecast Highlights - GFS
Snowfall prediction at mid-mountain (10,761ft)
Next Snow Expected	4 October
Next Snow Amount	2in
Next 48 Hours	-
Next 7 Days	-

Long-range Snow Outlook for Keystone

Snowfall

Snow Line

Max 67°F
Min 38°F

Snow unlikely

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Keystone 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 Keystone from OpenMeteo(GFS)
	Snow and Weather	Temp Town
Sun 20	Clear sky.	Max 58°F Min 39°F
Mon 21	Clear sky.	Max 63°F Min 38°F
Tue 22	Clear sky.	Max 67°F Min 40°F
Wed 23	Cloudy.	Max 60°F Min 45°F
Thu 24	Snow showers at altitude, rain showers below.	Max 58°F Min 42°F
Fri 25	Cloudy.	Max 64°F Min 42°F
Sat 26	Cloudy.	Max 64°F Min 41°F

This Snow Forecast for Keystone, 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 Keystone, 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.

Keystone Snow Forecast updated at 02:41 PDT, next update expected imminently.

Ensemble forecast for Keystone, USA at 9,318ft

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

Keystone typically enjoys a robust snowpack, with average snow depths reaching up to 80 inches during peak season. Regular snowfall ensures good conditions, but always check J2Ski for the latest snow updates.

Off-Piste Safety in Keystone

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