News | Washington State Climate Office

Sep 8, 2025 | Climate Matters, Rain and Snow, Seasonal, September 2025 Newsletter, Trends

Are Washington Summers Changing? A long-term look at Washington Precipitation Trends

If you have lived in Washington for long enough, you are probably well aware that our dry and sunny summers end predictably around October or early November when fall rains and cloud cover move in.

Sep 8, 2025 | Climate Outlook, September 2025 Newsletter

Early September Climate Outlook

The Climate Prediction Center issued a La Niña Watch in August. This watch means that La Niña conditions are likely to develop over the next several months, but that La Niña conditions are not currently in place.

Sep 8, 2025 | Climate Summary, September 2025 Newsletter

August and Full Summer 2025 Climate Summary

Temperatures tell a consistent story across the state with warmer than normal conditions present statewide. Temperatures were well above normal across virtually the entire state. August 2025 was 2.8°F above the 1991-2020 normal statewide, ranking as the 4th warmest August since 1895 (tied with August 1962), and the warmest since August 2022.

Sep 8, 2025 | Notable Weather Events, September 2025 Newsletter

August Notable Weather Events

August was a warm month characterized by notable heat waves statewide, a rare summertime atmospheric river rain event in the middle of the month, and isolated thunderstorms across the high terrain and across eastern Washington.

Sep 8, 2025 | Drought and Streamflow Update, September 2025 Newsletter

August 2025 Drought and Streamflow Update

Streamflow in August was slightly improved compared to July with the return of some near normal streamflow across the Olympics, western slopes of the Cascades and portions of the Columbia Basin when averaged across the month.