Pacific Northwest Forecast Calls for Sunshine and Warmer Temperatures

Cool temperatures and the risk of frost are expected across parts of the Pacific Northwest as Seattle and Portland transition to a predominantly dry, sunny weather pattern. Forecasts published October 10 and 11 by FOX 12 and FOX 13 call for chilly overnight conditions, limited rain chances, and a gradual warmup through the following workweek as high pressure builds over the region.

Portland recorded a low of 49 degrees at Portland International Airport on Saturday, October 10, marking its coolest morning of the month so far, according to KPTV. Temperatures across the metropolitan area reached the mid-to-upper 50s, with some locations briefly hitting 60 degrees.

Overnight lows were expected to fall into the low 40s in urban areas, while rural locations, valley foothills, and parts of the Cascade foothills could reach 33 to 36 degrees. KPTV reported frost advisories taking effect at midnight for the Coast Range and portions of nearby valleys and Cascade foothills, with patchy fog also possible.

Scattered showers affecting parts of the region Saturday were expected to diminish overnight. According to KPTV, most locations received little or no measurable rainfall, with accumulations reaching only a few hundredths of an inch in affected areas. Showers west of the Cascades were expected to end by 10 p.m., although isolated chances remained east of the mountain range.

Sunday, October 11, was forecast to bring mainly sunny skies west of the Cascades, with Portland-area temperatures climbing into the mid-60s. An easterly wind through the Columbia River Gorge could produce breezy conditions in the western Gorge and eastern Portland metro area, but KPTV did not anticipate strong gusts.

In Seattle, FOX 13 forecast a sunny but cool Sunday, with afternoon temperatures approaching 60 degrees. Overnight temperatures were expected to drop into the 40s across many locations, while Snoqualmie Pass could fall below freezing by Sunday morning.

FOX 13 also anticipated dry conditions for the remainder of the weekend, with lingering clouds possible near the Cascades. The station's forecast called for daytime highs in the low 60s during the workweek and a brief warming trend toward 70 degrees on Friday, October 16. A slight chance of showers remained for Wednesday.

Across the broader region, an upper-level ridge of high pressure was expected to strengthen as a trough moved east. KPTV forecast temperatures returning to the mid-to-upper 60s through the middle of the week, followed by highs in the low 70s on Thursday and Friday, October 15 and 16. The developing pattern was expected to limit rainfall, although a slight chance of showers could return Wednesday and possibly the following weekend.

The cooler conditions follow a warmer period in the Pacific Northwest. KPTV's October 10 forecast described Saturday as substantially cooler than the previous weekend, with highs around 60 degrees and a mix of sunshine and clouds between isolated showers. Clear skies and light winds were expected to contribute to the overnight frost risk through Sunday morning.

For the Seattle Seahawks, the forecast also indicated favorable conditions for Sunday's football game. A separate report published by Yahoo Sports on October 4 discussed weather expectations for Seattle's Week 4 matchup against the Los Angeles Chargers, forecasting temperatures in the lower 70s, winds of 6 to 7 mph or less, and a 20 percent chance of precipitation. That earlier forecast concerned a different game week and should not be confused with the cooler conditions predicted for October 11.