Fall officially begins at 10:21 a.m. Thursday morning, but it seems like summer wanted to extend her stay a couple more days in New England.
For the afternoon, high temperatures are expected to warm-up into the low to mid 80s inland, and slightly cooler along the southern coast as a sea breeze picks up out of the southeast. Normally, high temperatures are near 70 across New England for late September with overnight lows averaging in the mid-50s for Boston and into the mid-40s northward.
As a cold front sweeps in from Canada Friday afternoon, expect widespread downpours north with the passing of this front, however this cold front loses steam as it approaches southeastern New England, but we still cannot rule out a chance for showers Friday afternoon.
After the cold front passes through, there's no doubt that everyone will feel the cool Canadian air filter in. For your weekend outlook, a dome of high pressure flies in, giving us a picture perfect first full weekend of fall under plenty of sunshine with high temperatures much more seasonable for this time of year- into the mid to upper 60s!
However, it might be a little too chilly for those evening walks or early morning runs, so be sure to prepare for overnight lows into the upper 40s. Plus, we cannot rule out the threat for some patchy frost into Monday morning, which is normal for this time of the year. We typically see the first frost into northwestern New England as early as late September.