A return to seasonal temperatures is forecast by Wednesday night, but it turns out it will be short-lived. Highs are expected to bounce back to the 60s by Monday with more above-normal warmth ahead.
Lows should reach the mid-30s for the next two nights, just a few degrees above normal. A daytime high of 45 Thursday would be about five degrees colder than average this time of year.
But by Saturday, highs could reach the upper 50s and break into the 60s by Monday and Tuesday, according to the National Weather Service's Baltimore/Washington forecast office.
Some weather watchers have eyed building Arctic air over Canada and predicted it could make a break toward the south by the middle of the month. But long-term forecasts don't predict that yet.
The Climate Prediction Center in College Park is forecasting a more than 60 percent chance of above-normal temperatures across Maryland and the northeast from Dec. 10-14, six to 10 days out from now. The odds are nearly as high, about 50 percent, for the eight- to 14-day outlook from Dec. 12-18.
Both forecasts also predict at least a one in three chance of wetter than normal weather, though given the warmth, it would more than likely be rain, of course.
Still, for the whole month, the center is forecasting equal chances of above- and below-normal temperatures and precipitation.
The average temperature so far this month at BWI Marshall Airport is about 10 degrees above normal at 50 degrees. That's more like typical March or October weather.