From the WABI-TV5 & CW Forecast Center:
A small bubble of high pressure will bring partly sunny skies to Maine early Saturday morning, but a fast moving clipper type storm will cause skies to become mostly cloudy by late morning or early in the afternoon. The storm system along with some energy aloft will swing east through Maine and bring a period of showers to our region. Most of Maine will see scattered light showers later in the afternoon and evening, but a rather narrow strip of steadier rain will likely cross parts of the state as the storm quickly intensifies as it races east into the Gulf of Maine. The exact track of the storm will determine what part of the Pine Tree State sees the steadier rain and at this point in time it appears central Maine will be under the gun for the briefly heavier rainfall.
As the storm exits New England later Saturday evening a dome of high pressure will build south from Central Canada and bring brighter conditions to the Pine Tree State for Sunday. The combination of mostly cloudy skies and scattered showers will hold temps in the upper 40s to mid 50s Saturday. High temps Sunday will climb into the 50s across most of Maine, but likely hold in the upper 40s across the far north and mountains. The high will likely bring fair weather to Maine early Monday, but a developing storm system approaching the Northeast will bring increasing clouds to our area later in the day. The storm will likely move up from the Mid-Atlantic Coastline and bring a steady rain to much of New England along with an increasing onshore breeze Tuesday. An upper level low developing over the Great Lakes Region next week will keep conditions rather cool and somewhat unsettled next Wednesday through Friday.
Saturday: Some early sun then becoming mostly cloudy, with a variable wind at 6 to 12 mph and showers likely developing during the afternoon, with high temps in the upper 40s to upper 50s from north to south.
Saturday night: Early showers ending then becoming partly cloudy, with low temps in the mid 20s to lower 30s.
Sunday: Partly to mostly sunny, with high temps in the upper 40s north and 50s south.
Monday: Sun to increasing clouds, with high temps in the upper 40s to mid 50s.
Tuesday: Rain and wind likely, with a chilly onshore breeze, with high temps in the 40s.
Wednesday: More clouds than sun, with scattered showers likely and high temps in the upper 40s to mid 50s.
WABI-TV5 & CW Meteorologist