60-Day Extended Weather Forecast for Portland, OR

December 2025 Long Range Weather Forecast for Pacific Northwest

Dates	Weather Conditions
Dec 1-9	A few showers north, sunny south; very cold
Dec 10-12	Isolated showers, chilly
Dec 13-20	Rainy periods, some heavy; warm
Dec 21-24	Rainy north, sunny south; mild
Dec 25-31	Sunny, warm
December	temperature 49° (5° above avg.) precipitation 5.5" (avg. north, 3" below south)

January 2026 Long Range Weather Forecast for Pacific Northwest

Dates	Weather Conditions
Jan 1-9	Sunny, chilly
Jan 10-22	Rainy periods, warm
Jan 23-31	Sunny, then a few showers; cold
January	temperature 45° (1° above avg.) precipitation 4" (2" below avg.)

The 12-Month Long-Range Weather Report From The 2025 Old Farmer's Almanac

November 2025 to October 2026

Winter will be warmer than normal, with the coldest periods in late November, early December, and early February. Precipitation and snowfall will be below average, with the snowiest period in early February. April and May will be cooler than normal in the north and warmer south. Precipitation will be below normal. Summer will be cooler and wetter than normal in the north, while southern areas will be hotter and drier than normal. The hottest periods will be in mid- and late July and early and late August. September and October will be cooler and wetter than usual.

See the complete 12-month weather predictions in The Old Farmer's Almanac.

Weather Trend Graph

November 2025 to October 2026