Willamette Pass 7-Day Snow Forecast

Willamette Pass Long-Range Snow Forecast Updated today

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Updated 20 March 2026 10:49 PDT

Long-Range Snow Forecast for Willamette Pass

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

For Forecast detail, see below.

Willamette Pass Snow Forecast Highlights

When will there be fresh snow in Willamette Pass?

Willamette Pass Snow Forecast Highlights - GFS
Snowfall prediction at mid-mountain (5,902ft)
Next Snow Expected	25 March
Next Snow Amount	1in
Next 48 Hours	-
Next 7 Days	1in

Long-range Snow Outlook for Willamette Pass

Snowfall

Snow Line

Max 59°F
Min 17°F

1in New Snow

Snow Line from 6,001ft to resort level (5,121ft).

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Willamette Pass 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 Willamette Pass from OpenMeteo(GFS)
	Snow and Weather	Temp Town
Fri 20	Cloudy.	Max 59°F Min 43°F
Sat 21	Light snow showers at altitude, light rain showers below.	Max 46°F Min 31°F
Sun 22	Cloudy.	Max 58°F Min 31°F
Mon 23	Cloudy.	Max 57°F Min 37°F
Tue 24	Drizzle.	Max 42°F Min 36°F
Wed 25	1in New Snow Light snow. Snow Line from 6,001ft to resort level (5,121ft).	Max 34°F Min 19°F
Thu 26	Cloudy.	Max 47°F Min 17°F

This Snow Forecast for Willamette Pass, 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 Willamette Pass, 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.

Willamette Pass Snow Forecast updated at 10:49 PDT, next update expected 16:00 PDT.

Ensemble forecast for Willamette Pass, USA at 5,121ft

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.

Snow Forecast near Willamette Pass

Snow Forecasts for Ski Resorts near Willamette Pass
Ski Area	48 Hr	7 Day	Fr	Sa	Su	Mo	Tu	We	Th
Diamond Peak	-	2in

Snow Reliability

Willamette Pass typically enjoys reliable snowfall, with an average snow depth of 5 to 10 feet throughout the season. For the most current snow conditions, including snowfall updates, check J2Ski for the latest information.

Off-Piste Safety in Willamette Pass

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