Don’t expect to wake up to a frost-covered winter wonderland, but the National Weather Service office in Medford has issued a frost advisory for the early morning hours of Tuesday.

From 3 to 7 a.m. temperatures in the Rogue Valley will be in danger of dipping below freezing, the advisory warns, noting that sensitive plants could be killed by frost.

Clearing skies and a drier air mass will push overnight temperatures down in Jackson, Josephine and eastern Curry counties, the advisory said.

Monday’s high temperature in Medford was only 66 degrees, seven degrees below normal, meteorologist Mike Stavish said. With a light breeze out of the north and diminishing clouds, “the temperature will fall steadily,” he said.

While the predicted overnight low at the Medford airport is 36 degrees, low-lying areas on the outskirts of town could get colder, Stavish said. Unprotected plants in open areas will be most at risk, he said.

“It would probably be good to cover them,” Stavish said.

However, he noted that plants close to buildings or under tree cover likely will be fine in most areas of the Rogue Valley.

— Anita Burke