The sunshine has returned, after a cloudy, foggy, and wet Sunday for some. For most of Southern and interior Central New England, Sunday featured clouds and a few breaks of sun from time to time. However, from the New Hampshire seacoast through the Maine coastline, fog actually became more dense during the day! In fact, visibility was greatly reduced as far inland as the Maine turnpike Sunday afternoon.
For this afternoon, expect a mix of sunshine and fair-weather cumulus clouds. As of 11am, cumulus are already dotting the sky in Atkinson, NH. It will be a warm, but much less muggy afternoon as dewpoints have already fallen into the upper 50s in many spots. This reprieve from the humidity will be brief, as a south to southwesterly wind will transport warmer and more humid air our way on both Tuesday and Wednesday. Temperatures on Tuesday will climb into the 80s to even near 90 in some spots. A cold front will approach on Wednesday, and this front will be the focal point for scattered showers and thunderstorms. Some of the guidance is suggesting we'll be up around 90 on Wednesday. I'm a bit skeptical of that, because we'll need a decent amount of sun to get up to 90.
In any event, behind the front a cooler, drier, refreshing airmass will move in for the late week. This will promote daytime highs in the 70s and overnight lows in the upper 50s through the weekend.