Temperatures dipped to 38 degrees early Tuesday morning at Baltimore's point of record, the coldest reading there since mid-May.
The morning low was reported just before sunrise at Baltimore/Washington International Thurgood Marshall Airport. It suggests that the first frost of the year may have appeared in some outlying areas and at higher elevations around the region.
It hasn't been so cold at the airport since a 37-degree low May 16.
Normal lows this time of year are in the upper 40s, while normal highs are in the upper 60s.
It was still in the mid-50s at BWI by 10 a.m. Tuesday. Highs are expected to stay below normal, peaking in the mid-60s.
Temperatures close to normal are forecast for the rest of the week.