I personally enjoy the heat, but I can certainly see both sides of the argument. For example, 90 F and sunny felt great on Thursday when I was laying on the beach getting my man-tan on...but if felt considerably less awesome on Sunday when I was repairing my outside stairs (#OldManProblems).
If you need a break from our recent heat wave; you'll get it over the next few days.
Today: A stationary front is setup across central Maine this morning, dividing the state into two distinct temperature/humidity zones. Southern and central Maine are still sticky with high dew points, while northern Maine is relatively crisp. More importantly the front is bringing showers/thunderstorms and a large deck of low cloud cover. A few heavy downpours will roll through this morning with embedded thunderstorms adding a few rumbles of thunder to the mix. The most consistent shower activity will end by late morning and mid-day will feature mostly cloudy skies over central and northern Maine with some sunshine possible to the south. Any sunshine will act to destabilize the atmosphere further, touching off some thunderstorms later this afternoon. In short, it will be an unsettled day. High temperatures will drop some 10 F + in most spots when compared to the weekend, with highs in the mid to upper 70s.
Note: The atmosphere is tres juicy still so any showers could have some very heavy downpours, leading to flash flooding.
Tonight: Scattered showers and thunderstorms will float around the state with the stalled boundary acting as the catalyst for the activity. Most of the evening, however, will be spent mostly cloudy and dry with some dense fog. Lows will stay in the 60s and the air will remain relatively humid.
Tuesday: The setup doesn't really change on Tuesday, but there is less moisture for the stalled front to work with. As a result I expect less in the way of shower activity and more in the way of glimpses of sunshine. I'll call it partly sunny through mid-day with a chance of some afternoon showers and thunderstorms. Temperatures stay in the 70s for the most part.
Judging by the timing of the impulses of moisture, we should be in better shape for Wednesday. Morning sunshine will give way to scattered afternoon showers and thunderstorms; but I don't think they will be widespread.
A front starts to pull through on Thursday, leading to another unsettled day.
Finally the front will clear the coast by Friday morning and Friday actually looks really pleasant with sunshine and some drier air.
Overall we look to trough out a bit for the weekend, but that's not necessarily a bad thing as it should keep temperatures in a more reasonable zone.