News | Washington State Climate Office

Nov 7, 2025 | Climate Outlook, November 2025 Newsletter

Early November Climate Outlook

A La Niña advisory is in place meaning that La Niña conditions are present in the tropical Pacific Ocean. This year’s La Niña is on track to be a fairly weak event, in line with forecasts made earlier in the season, and will likely return to neutral conditions by the January-March period (56% chance).

Nov 7, 2025 | Climate Summary, November 2025 Newsletter

October 2025 Climate Summary

Statewide, October temperatures were near normal (-0.6°F below 1991-2020 normals) and precipitation totals were 109% of normal. Temperatures were 2-4°F below normal across the Cascades and 1-3°F below normal across much of eastern Washington and the Olympic Mountains.

Nov 7, 2025 | Drought and Streamflow Update, November 2025 Newsletter

October 2025 Drought and Streamflow Update

On October 6, following near-record warm and dry conditions and three years of declared drought in the Yakima Basin, the Department of Ecology issued a complete halt of surface water use in the Yakima Basin.

Nov 7, 2025 | Notable Weather Events, November 2025 Newsletter

October Notable Weather Events

The month kicked off with a decent rain event across western Washington followed quickly by a late-season warm spell from October 6-10. This warm spell brought what were very likely the last 70°F days of the year for most, if not all, locations across the state.

Oct 17, 2025

Mid October Climate Outlook

What’s Next for the Pacific Northwest?
Wetter than normal conditions most likely November through January.
The Climate Prediction Center’s monthly outlook for November 2025 brings continued uncertainty in temperatures, although most of the western and south central United States are likely to be above normal.

Oct 7, 2025 | Climate Matters, Climate Variability, El Niño/La Niña and Global Climate Oscillations, October 2025 Newsletter

Climate Matters: Haven’t there been a lot of La Niña winters lately?

Many regular readers of this column are aware of the effects of La Niña, and variations in the El Niño-Southern Oscillation (ENSO) in general, on the overall weather of the Pacific Northwest during the cool season.

Oct 7, 2025 | Climate Outlook, October 2025 Newsletter

Early October Climate Outlook

A La Niña Advisory was issued by the Climate Prediction Center on October 9 indicating that La Niña conditions are currently in place. La Niña conditions are the most likely scenario now through December-January-February.

Oct 7, 2025 | Climate Summary, October 2025 Newsletter

September 2025 Climate Summary

September 2025 was the warmest September on record in Washington back to 1895. Temperatures were +5.2°F warmer than the 1991-2020 normal when averaged statewide. Much warmer than normal temperatures observed across the eastern slopes of the Cascades and across much of eastern Washington.

Oct 7, 2025 | Announcements, October 2025 Newsletter

Join us for the PNW Water Summit

WHEN: November 4, 2025 7:30 am-4 pm PT (8:30 am to 5 pm MT)
WHERE: In person at Boise State University or Limited Virtual
Please register by October 30 to ensure an accurate catering count.

Oct 7, 2025 | Announcements, October 2025 Newsletter

The Annual PNW Water Year Impacts Survey Is Now Live!

Happy 2026 Water Year! Now that water year 2025 is complete, we want to hear from you! How was the Pacific Northwest (Washington, Oregon, and Idaho) impacted?
We encourage you to fill out the PNW Water Year 2025 Impacts Survey.