Northwest California to See Another Cold Morning Monday as Inland Valleys Drop Into the Low 30s
NORTHWEST CALIFORNIA — Another chilly morning is expected across northwest California on Monday, December 29, with overnight low temperatures falling mainly into the low to mid-30s, according to the latest temperature outlook from the region.
Several inland valleys and higher-elevation communities are forecast to approach near-freezing conditions, raising concerns for frost, cold-sensitive vegetation, and slick surfaces during the early morning hours.
Coldest Temperatures Focused in Inland Valleys
Forecast data shows the coldest readings developing away from the immediate coastline, particularly across interior portions of Humboldt, Trinity, and Mendocino counties.
Expected low temperatures include:
- Lower 30s in inland valleys such as Covelo, Laytonville, Ruth, Hayfork, and Trinity Center
- Mid-30s across communities like Ukiah, Willits, Weaverville, and Willow Creek
- Upper 30s to low 40s closer to the coast, including Eureka, Arcata, and Fort Bragg
Some sheltered valleys could briefly dip to or just below freezing, especially where skies clear and winds remain light overnight.
Coastal Areas Remain Slightly Milder
Coastal locations are expected to remain a few degrees warmer due to marine influence, with lows generally holding in the upper 30s to lower 40s.
However, even coastal communities may notice colder-than-average morning conditions, especially in wind-protected spots.
Potential Impacts Early Monday Morning
While no widespread hard freeze is anticipated, residents should still be prepared for:
- Frost formation in colder inland valleys
- Cold stress for unprotected plants
- Slick patches on bridges and shaded roadways
- Increased use of heating during early morning hours
Drivers heading out early Monday are urged to remain alert for localized slick spots, particularly in rural and elevated areas.
Timing: When the Cold Peaks
- Coldest period: Pre-dawn through early Monday morning
- Temperatures begin to recover: After sunrise Monday
- Cold trend: Another cool start, but not expected to be as extreme as interior mountain freezes
How cold did it get where you live this morning? Share your local temperatures and stay connected with WaldronNews.com for continued weather updates and regional forecasts.