Seattle, Washington – A strong and persistent warm-and-dry weather pattern is expected to dominate the Pacific Northwest and the broader West Coast from Thursday through Monday, delivering above-average temperatures and virtually no chance of precipitation across California, Oregon, and Washington.
According to the National Weather Service and NOAA’s Climate Prediction Center, the region is under a high-confidence signal for above-normal temperatures during the January 15–19 period. At the same time, precipitation chances are well below normal, pointing to an extended dry stretch that suppresses the typical mid-January storm track along the West Coast.
In Washington, including Seattle, Tacoma, Everett, Olympia, and the Puget Sound region, rain is notably absent from the outlook. Daytime temperatures are expected to run several degrees above average, while overnight lows remain mild for midwinter. Interior valleys may see morning fog or low clouds, but no organized rain systems are expected.
Across Oregon, including Portland, Salem, Eugene, and the Willamette Valley, conditions remain dry with temperatures trending above normal. The Cascades will see limited new moisture, slowing snowpack growth and reducing winter travel impacts over mountain passes compared to a typical January stretch.
In California, dry weather extends statewide. Northern and central California, including San Francisco, Sacramento, San Jose, and the Central Valley, will see mild afternoons and cool but manageable nights. Southern California remains dry as well, with inland areas experiencing especially warm daytime conditions for this time of year.
This pattern is driven by a strong ridge of high pressure parked along the West Coast, keeping storm systems displaced well to the north. Travel conditions are expected to remain favorable regionwide, though residents should remain mindful of air quality issues and longer-term water supply impacts if the dry pattern persists.
The warm, dry setup is expected to hold through Monday, with little indication of a meaningful shift toward cooler or wetter conditions until beyond this period.
