From the US National Weather Service
Going to be chilly tonight. Skies will continue to clear and winds will weaken, setting up a great night for radiational cooling. This will allow for overnight lows close to 10 degrees below normal. The frost advisory only covers a portion of the region, as these counties have seen the start to the growing season. The rest of the counties are getting close, but not quite there yet. Take care of any plants you may have outside, even if you are not within the advisory area.
On the brighter side, it will be a pleasant day with a high of 60 tomorrow.
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