Another chilly start to the day ahead for your Thursday. Frost will be an issue for most drivers early today, so be prepared to scrape that windshield again this morning. Fog has also developed in some areas, but is a much bigger issue for areas from Marysville to the South. Temperatures have dipped into the mid 30's for most valley areas this morning, and into the high teens to low 30's in mountain areas. Winds are out of the Northwest to 10mph early today, but light winds are expected for your afternoon. High temperatures will range from the low to mid 60's in the valley today, and mountain areas will end up in the low to mid 50's.
Mostly clear skies are on the way for your Friday, and temperatures will be slightly warmer. A decent chance for showers will return to the mountains in the Northwest corner of the state Friday night into early Saturday. Showers could track into portions of the Sierra by Saturday morning, but will diminish quickly. Dry conditions then return to all of Northern California from Saturday through the New Year. Temperatures will be in the low to mid 60's for the valley for your entire extended forecast, with low temperatures bottoming out in the 30's. Mountain areas will mostly be in the low to mid 50's, with teens and 20's overnight.
A modest cooling trend, and the potential for showers will return for the middle to latter part of next week.