Late November Climate Outlook
What’s Next for the Pacific Northwest?
Colder than normal conditions most likely December through February. Wetter than normal conditions across eastern Washington.
The Climate Prediction Center’s monthly outlook for December 2025 shows slightly increased chances of cooler than normal conditions across the northern half of Washington. Seasonal climate models indicate cold air is likely to descend into the central part of the country as we head into early December, and depending on how much of this cold air makes its way into Washington state, we could see a cool start to December as well. Precipitation in December is slightly favored to be above normal across eastern Washington with a 40-50% chance of wetter than normal conditions along the WA/ID border.
As we look further out to the December-February seasonal period, there is slightly more predictability as the impacts of La Niña tend to become more prevalent in late winter. The CPC’s guidance below shows increased chances of cooler than normal conditions statewide with a 40-50% chance of cooler than normal conditions across the northeastern quarter of the state. Wetter than normal conditions also are slightly favored from the Cascades eastward with the highest chances (40-50%) along the WA/ID border.
La Niña conditions are still present in the Pacific.
Our weak La Niña is still in place and has developed further over the last several weeks. La Niña’s impacts tend to be more pronounced in mid- to late-winter, but weak La Niña’s generally provide less predictability than a more pronounced event would.