Pacific Northwest Winter Forecast 2025-2025. Neutral conditions remain in place for the equatorial pacific ocean. While anomalies certainly happen, noaa's definition provides guidelines for what a typical la niña winter entails.

Noaa’s winter outlook is out and it shows the pacific northwest having higher chances of colder and wetter than normal weather through the months of december to. La niña happens when the waters in the eastern equatorial pacific cool at least 0.5 degrees celsius below average.