The season's first frost is likely across Maryland early Friday morning as temperatures dip into the 30s for the first time since April.
A frost advisory is in effect across the state — everywhere except Garrett County, where temperatures already dropped as low as the upper 20s early Thursday morning. A freeze warning is in effect in Allegany County.
Frost can damage or kill plants and crops, and the first freeze marks the end of the growing season for farmers. Residents are advised to cover up outdoor plants or bring them indoors if possible.
In the Baltimore region, lows could hit the mid-30s, while they could get close to the freezing mark farther north and west.
Temperatures haven’t dropped below 40 degrees at Baltimore-Washington International Thurgood Marshall Airport since April 30, when they hit 37 degrees.
A first freeze in places like Westminster and Frederick would be right on time, according to the University of Maryland Extension. It usually comes by late October there.
At BWI, the first freeze arrives by Oct. 28, on average. In Baltimore City, it often doesn’t come until mid-November.