An important lesson I've learned since moving to Maine: Don't visibly "cheer on" warm ups during the dead of winter. The ski/board/snowmobile crowd will come at you like a bunch of spider monkeys. (Other important lessons: 1) "Beans" almost never refers to the food 2) Ayuh means yes but the inference is that your question was a little stupid 3) Portland is considered "Northern Massachusetts")
So I won't cheer this warm up on...but it's happening either way.
Today: Our last chilly day in a while, but nothing frigid. Temperatures will end up in the mid 20s for highs in most spots, with the exception of far northern Maine which will struggle to break 10 F. Mostly sunny skies will dominate as last evening's cold front is now well offshore.
Tonight: Mostly clear and cold. Lows between 8 and 18 with the warmest readings appearing closer to the coastline.
Tuesday: Mostly sunny and a bit mild. That's the thing with this warm up...it will be gradual. Look for highs in the upper 30s to low 40s by Tuesday afternoon.
Wednesday: Morning sun will give way to afternoon clouds as a weak system approaches. Still, it will be above average in the temperature department, between 37 and 43 F.
A weak little "bowling ball" of energy will swing through on Wednesday night so look for some light snow and snow shower activity. There could be a few inches of accumulation in the mountains, but the rest of us won't see anything worth noting.
Back to sun on Thursday as temperatures nose into the mid 40s across southern Maine.
Some afternoon rain on Friday (it's not even close snow lovers, it will be way too warm) will usher in the warmest part of this pattern shift for Saturday/Sunday.
We could get to 50 F by Sunday afternoon. I'm not ready to lock that in yet, but there's a 65% chance I'd say.
We'll snap by to reality (oops there goes gravity) by Monday as a cold front swings through with colder air.