Cold air from the north continues to keep the region in a chill.
Much of Northern California and the Bay Area started the day under a National Weather Service freeze warning expected to last until 10 a.m.
Forecasters expect overnight temperatures to change as the cold air moves east, but dry chilly conditions should remain for most of the week.
The NWS forecast for the Sacramento region is below:
Today: Areas of frost in the morning. Sunny. Highs around 51. Light winds.
Tonight: Clear. Patchy frost after midnight. Lows 25 to 33. Light winds.
Wednesday: Areas of frost in the morning. Sunny. Highs 51 to 57. Light winds.
Wednesday night: Clear. Patchy frost after midnight. Lows 26 to 34. Light winds.
Thursday: Areas of frost in the morning. Sunny. Highs 53 to 59. North winds up to 10 mph.
Thursday night: Clear. Patchy frost. Lows 29 to 35.
Friday: Sunny. Areas of frost. Highs 55 to 61.
Friday night through Martin Luther King, Jr. Day: Clear. Lows 31 to 38. Highs 55 to 61.