Overnight temperatures dropped to around 29 degrees, which could damage sensitive vegetation and damage exposed water pipes.
After widespread frost in the morning, though, it will be partly cloudy and warmer with highs in the middle 60s.
More clouds will move in tonight, with rain likely after midnight and overnight lows in the upper 40s.
After a soggy start to Thursday, highs will be in the mid-50s with afternoon showers expected. Skies Thursday night will remain mostly cloudy with showers mainly in the evening and overnight lows in the mid-40s.
Expect mostly cloudy skies Friday, which will be a bit warmer with highs in the lower 60s.