Portland, Oregon Weather Alert Today: Frost Risk and 36°F Cold Start Before Rainy New Year’s Day 2026

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Portland, Oregon – Frost clings to parked cars and sidewalks this morning as clear skies give the city a quiet, cold sendoff to 2025. The calm will not last. Clouds thicken later today, and rain moves in as Portland steps into the first days of 2026.

According to the National Weather Service, temperatures start near the mid-30s with patchy frost possible before clouds increase. Moisture arrives late New Year’s Day, bringing steady rain into Thursday night and setting up a wet pattern that carries through Friday and the weekend.

Drivers across the metro should watch for slick spots early, especially on bridges, overpasses, and shaded neighborhood roads. Frost may linger into the morning commute before melting. By evening, wet pavement replaces icy concerns as rain spreads across Multnomah, Washington, and Clackamas counties.

Rain chances increase Thursday night, with steady rainfall expected into Friday. While snow is not anticipated at lower elevations, colder air earlier raises brief concern for slick travel before temperatures climb into the lower 50s. Plan extra time if heading out for New Year’s gatherings or returning home late.

By Friday and Saturday, rain becomes the main impact. Periods of steady showers may reduce visibility along I-5, I-84, and Highway 26. Gusty breezes at times will add to the chill, even as daytime temperatures stay mild for early January.

The wet pattern continues into Sunday, keeping rivers and roads closely watched. No flooding is expected, but ponding is possible during heavier showers. Keep rain gear ready and slow down during evening travel.

More updates may follow as rain intensity becomes clearer. Seeing frost or slick roads near you this morning? Share what conditions look like in your area.

Five-Day Outlook for Portland, Oregon

Today: Mostly sunny early, clouds later; high near 48
New Year’s Day: Increasing clouds, rain late; high near 44
Friday: Rain likely, breezy at times; high near 53
Saturday: Rain continues; high near 53
Sunday: Showers likely; high near 52