California – A cold, still morning is settling over coastal Northern California, where frost is forming on windshields and garden leaves as temperatures hover near freezing across the Eureka area.
According to the National Weather Service in Eureka, a Frost Advisory remains in effect until 9 a.m., with temperatures dropping as low as 32 degrees in interior valleys and sheltered coastal zones. Sensitive vegetation may be damaged if left uncovered, especially in Humboldt and Mendocino counties.
Across Eureka and nearby communities like Arcata, McKinleyville, and Fortuna, calm winds and clear skies are allowing temperatures to dip quickly early in the day. Patchy valley fog may also develop, briefly reducing visibility along US-101 and local roadways. Drivers should stay alert for sudden visibility drops, especially near low-lying areas and river corridors.
Conditions shift quickly by afternoon. Sunshine returns with highs climbing to near 59 degrees, drying out roads and improving travel conditions across the region. The weekend brings a steady warm-up, with highs reaching the mid-60s by Saturday and holding into Sunday.
Even so, early mornings remain cold enough for isolated frost in inland valleys. Gardeners should cover sensitive plants and bring potted greenery indoors where possible. It’s a classic early spring pattern where mild afternoons follow chilly starts.
Looking ahead, a slight chance of rain develops by early next week, with patchy fog continuing to impact visibility during morning hours. Stay prepared for quick changes between crisp mornings and warmer afternoons.
Are you seeing frost in your neighborhood this morning?
Five Day Forecast for Eureka, California
Today: Sunny, high near 59°F
Tonight: Mostly clear, low near 39°F
Saturday: Mostly sunny, high near 66°F
Sunday: Partly sunny, high near 66°F
Monday: Patchy fog, then mostly sunny, high near 63°F
