J2Ski New Zealand J2Ski logo
Facebook

Willamette Pass Snow Forecast - 21st September 2026

Willamette Pass Snow Report and Forecast

ECMWF IFS
GEM
GFS

PROSubscribe to Switch Weather Model

Updated 21 September 2026 17:43 NZST

Snow Forecast for Willamette Pass

Snow and Weather from 21 September.

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?
There is no snow currently in the forecast for Willamette Pass.

Forecast for today in Willamette Pass

Max 21℃
Min 10℃

Valley temperatures from an overnight low of 10℃ to daytime highs around 21℃

Temperature at BaseTemp at Base

Mon
21

Snow unlikely

ClearClearClearCloud

Clear sky early, then cloudy later.

Forecast times for Willamette Pass are in Denver (US/Mountain) time zone.

Willamette Pass 7-Day Snow Forecast Overview

Get this snow forecast by e-mail

Summary Weather and Snow Forecast for Willamette Pass from OpenMeteo(GFS)
Mon
21
Tue
22
Wed
23
Thu
24
Fri
25
Sat
26
Sun
27
WindSW F2W F2SW F2
2,037m
18℃
Cloud
12℃
Cloud
17℃
Cloud
17℃
Cloud
9℃
Cloud
18℃
Clear
12℃
Cloud
SW F2W F2SW F2
1,799m
20℃
Cloud
14℃
Cloud
19℃
Cloud
19℃
Cloud
11℃
Cloud
19℃
Clear
14℃
Cloud
SW F2
1,561m
21℃
Cloud
15℃
Cloud
20℃
Cloud
20℃
Cloud
12℃
Cloud
21℃
Clear
15℃
Cloud
Snow Line
Max Town21℃15℃20℃20℃12℃21℃15℃
Min Town10℃5℃5℃7℃4℃3℃5℃

This table shows the average forecast snowfall, the maximum temperature, and expected general weather at resort, lower and upper mountain levels. For daily forecast details, see below.

United States Accommodation (Apartments, Chalets, Hotels) Map

 

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.

Understanding and predicting Snow Conditions in Willamette Pass

Here are our tips for making the most of a trip to Willamette Pass, with the help of the J2Ski Snow forecasts and reports. You can find some great skiing in Willamette Pass, but like any mountain, snow conditions change throughout the season, from day to day, and even from hour to hour.

Whether you’re sticking to the marked pistes or venturing off-piste, here’s what you need to know:

Pistes (Groomers) or Off-Piste

These can be a world apart, regarding snow conditions, even ignoring the difference between the natural terrain features to be found off-piste and the generally controlled surfaces and slopes of a pisted (groomed) run.

  • Piste Conditions can range from fresh powder to firm, icy surfaces, particularly after warm spells or a busy day on the mountain with the passage of many skiers.
  • Off-Piste Conditions are far more variable. Wind and sun can quickly transform fresh snow into wind crust or slushy layers, whilst cold weather can preserve stashes of powder many days after a snowfall.

WARNING - skiing off-piste (out-of-bounds) at Willamette Pass is not always controlled (slopes made safe from avalanche risk) or patrolled. Always check local advice, ski with safety kit (and know how to use it), and never ski alone.

Analyzing Weather and Snowfall Forecasts

Whilst no forecast can tell you exactly how snow conditions in Willamette Pass will develop, checking the forecast regularly should give you an idea of what to expect.

New snowfall can bring fresh powder and refresh the surfaces of pisted runs. Powder can be tracked out quickly at busy times, but in less crowded and shaded areas, fresh snow can linger for days.

Changes in weather conditions, such as milder temperatures, rain or wind, can degrade snow quality. Conversely, cold, stable weather can preserve conditions for extended periods.

Predicting Future Snow Quality

Regularly check our snow and weather forecasts for Willamette Pass for changes that may affect snow quality. Forecast snowfall depth and recent snowfall are good indicators of what to expect.

Use historical data and recent snow reports to understand past snow conditions and anticipate future changes.