Will Washington see warm, dry weather or rain in fall 2025? What experts predict
People in Washington may want to keep their warm-weather clothing handy, even as autumn approaches.
Fall is predicted to be “quite warm” in the western United States this year, according to a forecast from The Old Farmer’s Almanac.
Here’s a closer look at what the coming months may have in store weather-wise in Washington:
What’s the fall weather forecast for Washington in 2025?
September and October are expected to “be warmer and wetter than normal overall” in the Pacific Northwest, according to The Old Farmer’s Almanac’s fall forecast.
In September, the average temperature in the region is expected to be 63 degrees, or 1 degree warmer than normal, and 1 inch of rain is expected to fall. That’s a little below what’s normal.
Overall, it’s set to be “a mostly sunny month” that includes “brief cool spells and light rain early and mid-month” before “turning very warm late,” The Old Farmer’s Almanac said.
A 60-day extended forecast for Olympia says to watch out for “sunny, very warm” weather from Sept. 24-30.
October is predicted to cool some across the region, although the predicted average temperature of 57 degrees is 2 degrees warmer than normal.
Rainfall of 4.5 inches is expected, or 1 inch more than normal.
“Expect a mix of sunny and rainy periods, with mild to warm temperatures throughout” in the region, The Old Farmer’s Almanac said.
As should be no surprise, Eastern Washington looks to be in for a drier fall than the western part of the state, according to The Old Farmer’s Almanac.
Meanwhile, the National Weather Service Climate Prediction Center’s outlook for September through November shows an equal chance of precipitation being above or below normal in the Pacific Northwest.
When is the first day of fall in 2025?
This year, the first day of fall is Sept. 22.
That’s the autumnal equinox in the Northern Hemisphere.
“During an equinox, the sun crosses what we call the ‘celestial equator’ — an imaginary extension of earth’s equator line into space. The equinox occurs precisely when the sun’s center passes through this line,” according to The Old Farmer’s Almanac.
For the Northern Hemisphere, the autumnal equinox happens “when the sun crosses the equator going from north to south,” and the vernal equinox is “when it crosses from south to north,” The Old Farmer’s Almanac said, noting that “in the Southern Hemisphere, it’s the reverse.”
Following the autumnal equinox, the “days become shorter than nights as the sun continues to rise later and nightfall arrives earlier. This ends with the winter solstice, after which days start to grow longer once again,” The Old Farmer’s Almanac said.
This story was originally published August 15, 2025 at 5:00 AM with the headline "Will Washington see warm, dry weather or rain in fall 2025? What experts predict."
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