I-780 CA weather conditions near Port Costa, California

Roadnow AI Agent Live Update

7 day weather forecast

• Today 2025-12-09, Decreasing Clouds. Mostly cloudy, then gradually becoming sunny, with a high near 54. East wind around 6 mph.
• Tonight 2025-12-09, Partly Cloudy. Partly cloudy, with a low around 43. East wind 3 to 6 mph.
• Wednesday 2025-12-10, Mostly Sunny. Mostly sunny, with a high near 56. East northeast wind around 7 mph.
• Wednesday Night 2025-12-10, Mostly Clear. Mostly clear, with a low around 43. Northeast wind 3 to 5 mph.
• Thursday 2025-12-11, Mostly Sunny. Mostly sunny, with a high near 61. East northeast wind around 7 mph.
• Thursday Night 2025-12-11, Mostly Clear. Mostly clear, with a low around 42.
• Friday 2025-12-12, Mostly Sunny. Mostly sunny, with a high near 58.
• Friday Night 2025-12-12, Partly Cloudy. Partly cloudy, with a low around 42.
• Saturday 2025-12-13, Mostly Sunny. Mostly sunny, with a high near 58.
• Saturday Night 2025-12-13, Partly Cloudy. Partly cloudy, with a low around 44.
• Sunday 2025-12-14, Partly Sunny. Partly sunny, with a high near 58.
• Sunday Night 2025-12-14, Mostly Cloudy. Mostly cloudy, with a low around 45.
• Monday 2025-12-15, Slight Chance Rain. A slight chance of rain. Partly sunny, with a high near 58.