Willamette Pass 7-Day Snow Forecast

Willamette Pass Long-Range Snow Forecast Updated today

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Updated 22 May 2026 18:41 BST

Long-Range Snow Forecast for Willamette Pass

Long-range (14 to 45 days) from 22 May.

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 (1,799m)
Next Snow Expected	26 May
Next Snow Amount	1cm -
Next 48 Hours	- -
Next 7 Days	1cm -

Long-range Snow Outlook for Willamette Pass

Snowfall

Snow Line

Max 22℃ 71°F
Min -1℃ 29°F

1cm New Snow

Snow Line from 1,649m 5,410ft to resort level ( 1,561m 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 22	Clear sky.	Max 18℃ 65°F Min 5℃ 41°F
Sat 23	Cloudy.	Max 19℃ 66°F Min 8℃ 46°F
Sun 24	Clear sky.	Max 22℃ 71°F Min 7℃ 44°F
Mon 25	Cloudy.	Max 19℃ 66°F Min 4℃ 39°F
Tue 26	1cm New Snow Light snow showers. Snow Line from 1,649m 5,410ft to resort level ( 1,561m 5,121ft ).	Max 7℃ 44°F Min -1℃ 29°F
Wed 27	Fog.	Max 6℃ 42°F Min 2℃ 35°F
Thu 28	Clear spells.	Max 17℃ 62°F Min 3℃ 37°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 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.

Willamette Pass Snow Forecast updated at 18:41 BST, next update expected 00:00 BST.

Ensemble forecast for Willamette Pass, USA at 1,561m

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	-	1cm -

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.