DAYS 1-5 (SEPTEMBER 26-30)<\/p>\n\n\n\n
Here’s the outlook for the final 5 days of the month of September, including the first weekend of astronomical autumn. But let’s start with our Friday, today, featuring lowering dew points but still pretty mild to warm air behind last night’s cold frontal passage. This particular front, unlike several recent ones, is not delivering air as cool, so it’ll still be t-shirt and light jacket weather today with a sun\/cloud mix, along with an active breeze at times. While I expect dry weather to be dominant, the approach and passage of an upper trough and surface reflection can trigger a passing shower, particularly north of I-90, from late afternoon to early evening, so watch for that. Any activity would be isolated and short-lived, but could provide a rainbow photo-up if occurring prior to sunset! This trough will introduce slightly cooler air for our upcoming weekend, which looks mainly dry. The only thing we have to watch for is a little light rain \/ shower activity on the northern edge of low pressure passing well to our south. This could bring some raindrops out of a period of heavier cloud cover especially south of I-90 in the Saturday night to Sunday morning time frame. Sunshine will be most abundant Saturday morning and Sunday afternoon. Early next week is one of those times where the weather will be interesting while not much is happening, at least visually notable. The set-up is large scale. As you know, the tropics in the Atlantic got more active this week, with Hurricane Gabrielle at sea, but now passing through the Azores as a post-tropical cyclone. TS Humberto is organizing and strengthening over water and its track is expected to be over water into next week, taking it west of Bermuda but well off the US East Coast. A disturbance with a very good chance of becoming the next named system (would be Imelda, but not there as of this update) has a less-clear future, but can be a threat to the US Southeast Coast in the days ahead. (There will be chatter about that in the comments and I’ll share future updates from colleagues as well.) Meanwhile, we’ll have a very mild Monday as a weak area of high pressure sinks to our south, but a strong cold front will move through the region on Tuesday, with no rain threat, but just some passing clouds and a notable wind shift. A large high pressure area will be building in eastern Canada, providing the push for the front and delivering cooler air by later Tuesday – that day itself still being on the milder side but not as warm as Monday. We’ll also notice, after fairly light winds on Monday, a pick-up of a north to northeast wind on Tuesday as part of the air flow between the big high in eastern Canada and the well-offshore and well-to-the-south tropical activity. So despite the fact that we are going into a quieter sensible weather stretch here, there is still much to follow.<\/p>\n\n\n\n
TODAY: Sun filtered often by lots of high clouds into afternoon then developing puffy clouds from the west later with a slight chance of a passing shower, even brief downpour, mainly north of I-90 by late-day. Highs 71-78. Wind W 5-15 MPH.<\/p>\n\n\n\n
TONIGHT: Partly cloudy early, then clear. Patchy ground fog low elevations. Lows 52-59. Wind W to variable under 10 MPH.<\/p>\n\n\n\n
SATURDAY: Sunshine most dominate morning and more limited afternoon. Highs 68-75, coolest coast. Wind N to variable up to 10 MPH with developing coastal sea breezes. <\/p>\n\n\n\n
SATURDAY NIGHT: Mostly cloudy. A little light rain possible south of I-90. Lows 50-57. Wind variable up to 10 MPH.<\/p>\n\n\n\n
SUNDAY: Considerable cloudiness early to mid morning including the chance of a little light rain near the South Coast, then increasing sunshine. Highs 68-75, coolest coast. Wind variable up to 10 MPH \/ coastal sea breezes.<\/p>\n\n\n\n
SUNDAY NIGHT: Mostly clear. Patchy ground fog interior low elevations. Lows 52-59. Wind W up to 10 MPH.<\/p>\n\n\n\n
MONDAY: Mostly sunny. Highs 75-82 except 68-75 South Coast \/ Cape Cod. Wind SW 5-15 MPH.<\/p>\n\n\n\n
MONDAY NIGHT: Mostly clear. Patchy ground fog interior low elevations. Lows 53-60. Wind SW under 10 MPH.<\/p>\n\n\n\n
TUESDAY: Sun and passing clouds. Highs 71-78. Wind W 5-15 MPH shifting to N to NE 10-20 MPH with higher gusts especially along the coast.<\/p>\n\n\n\n
DAYS 6-10 (OCTOBER 1-5)<\/p>\n\n\n\n
Midweek next week features a cooler shot with a gusty breeze from the northeast between high pressure to the north and far-offshore Humberto. Fair, tranquil weather – cool nights & milder days – later next week. Potentially needing to watch moisture to the south by very end of period – more to say about this soon (could be remnant tropical moisture).<\/p>\n\n\n\n
DAYS 11-15 (OCTOBER 6-10)<\/p>\n\n\n\n
Not a high confidence outlook with uncertainty regarding future behavior of tropical moisture to the south, but may hear from it in the form of wet weather to start this period before a drier pattern returns.<\/p>\n","protected":false},"excerpt":{"rendered":"
DAYS 1-5 (SEPTEMBER 26-30) Here’s the outlook for the final 5 days of the month of September, including the first weekend of astronomical autumn. But let’s start with our Friday, today, featuring lowering dew points but still pretty mild to warm air behind last night’s cold frontal passage. This particular front, unlike several recent ones, … Continue reading Friday September 26 2025 Forecast (7:24AM)<\/span>