1weather logo
From Fog To Sun: California’s September Weather Mix
From Fog To Sun: California’s September Weather Mix
US · Published Sep 4, 2025
• San Diego County will experience fog late Wednesday into Thursday morning, with sunny afternoons and highs around 81°F.
• Humboldt County faces dense coastal fog Thursday morning, clearing by Saturday with highs in the mid-60s.
• California's weather transitions from patchy fog to sunshine as September progresses, with cooler early fall conditions.
Patchy fog gives way to sunny skies
California's weather this week is a mixed bag, transitioning from patchy fog to sunny skies as September progresses. Early fall conditions bring cooler temperatures, particularly noticeable in the mornings.
Related News