Frost could coat the ground this week...

The signs of the changing seasons include frost on the ground, and that will be a good possibility in many locations during the early morning hours this week. High pressure building in from the Ohio Valley will bring plenty of sunshine today, with light northwest breezes coming down the mountains boosting temperatures well into the 60s during the afternoon. However, a cooler air mass gradually moving into the region will allow temperatures to lower quickly at night, down into the 30s early Wednesday morning. The highest probability of frost will be in outlying rural communities. Daytime temperatures on Wednesday are not expected to rise out of the 50s.
Another surge of cool air will arrive later in the week.

While temperatures may rebound above 60 degrees Thursday afternoon, we'll be back down in the 30s at night. We're in for a couple of frosty starts Friday and Saturday mornings, with most temperatures well down into the 30s. Frost may be scattered Friday morning, but will likely be more widespread on Saturday, when most locations will reach near or below the freezing mark. So be prepared for the frost, as even the city may see some to start the weekend.

A strong area of high pressure building across the Mid-Atlantic over the weekend will bring a wide range in temperature from early morning to late afternoon. Expect afternoon temperatures on Saturday to reach the low to mid 60s, with upper 60s to near 70 on Sunday.