Monday September 15 2025 Forecast (7:21AM)

48 Comments

DAYS 1-5 (SEPTEMBER 15-19)

High pressure over eastern Canada provides fair weather today into Wednesday. Later Wednesday to early Thursday our stretch of fair weather is interrupted by the passage of low pressure to our south. A cloud shield from the low will move up into the region, but like a similar set-up last week, the rain will struggle to get too far north and favors the South Coast region for impact, while much of the region likely sees no rainfall from it. High pressure re-gains control of the weather later Thursday into Friday. Sometime on Friday, expect the passage of a cold front without showers but with a wind shift.

TODAY: Fog patches low elevations early, otherwise dominant sunshine with a few high clouds. Highs 71-78, coolest coast. Wind NW to N up to 10 MPH into midday with developing coastal sea breezes in the afternoon.

TONIGHT: Mostly clear. Low elevation fog patches. Lows 43-50. Wind calm.

TUESDAY: Mostly sunny. Highs 71-78. Wind variable up to 10 MPH with coastal sea breezes.

TUESDAY NIGHT: Mostly clear. Low elevation fog patches. Lows 43-50. Wind calm.

WEDNESDAY: Clouds increase. Highs 67-74. Wind NE to E up to 10 MPH.

WEDNESDAY NIGHT: Mostly cloudy. Rain possible for a while South Coast. Lows 47-54. Wind E up to 10 MPH.

THURSDAY: Clouds decrease. Highs 72-79. Wind variable to SW up to 10 MPH.

THURSDAY NIGHT: Mostly clear. Patchy fog. Lows 50-57. Wind SW up to 10 MPH.

FRIDAY: Partly cloudy. Highs 75-82. Wind SW 5-15 MPH, shifting to NW.

DAYS 6-10 (SEPTEMBER 20-24)

High pressure from Canada delivers fair, cooler weather for the September 20-21 weekend. High pressure maintains control of the weather into next week with additional dry weather dominating along with a slight temperature moderation. We will have to watch a couple low pressure systems to the west and south but they would likely struggle to have much impact. Autumn begins with the occurrence of the equinox at 2:19 p.m. EDT on September 22.

DAYS 11-15 (SEPTEMBER 25-29)

Again watching areas of low pressure / moisture to the southwest but they likely struggle to make full impact here as our overall dry pattern continues toward the end of the month.

48 thoughts on “Monday September 15 2025 Forecast (7:21AM)”

  4. Drake Maye looked pretty good yesterday. Nice win for the pats.

    On another note, nice to see Mac Jones lead the 49ers to a 26-21 win with 3 TDs

  5. Re:Wordle
    COMMON word that had me totally lost. I DIDN’T get it till the 6th guess. I’M going to look pretty poor on this one

  7. Thanks, TK.

    This time of year, our weather pattern tends to be VERY different from the one experienced across Northwestern Europe.

    I got used to autumn in England and The Netherlands. But it wasn’t an easy adjustment at first. While there are some relatively nice days during the fall there, the majority feature (light) rain or (strong) wind. I remember biking into the wind when I went to school in Holland in the early 80s on days like today (near gale-force wind at the coast).

    2. 3 for me too.

      JPD. It’s always interesting to see which words cause us the most trouble. Happens at the oddest times to all of us. You’ll never look poor . !!! It’s the nature of the game. 😉

          1. Five is a very familiar place for me too. Good to get. If I’m understanding the wordle bot, It seems it comes down to first words. And the one you choose is a crap shoot. (Not sure if that’s a word I can use but does seem most fitting.)

  9. Thank you, TK. Dropped to 51 overnight with DP around the same numbers as the temp. Was Froggy outside and on the windows. 60 now

  16. JP Dave, to your point on the at times miserable weather in the fall in Northwestern Europe, it can be fairly dismal for periods during autumn. Not always. There are some nice days. But overall, we in SNE have a decisive advantage weather-wise over Northwestern Europe in fall. BUT they have a decisive advantage in spring (happens earlier; more tranquil and certainly less volatile). I’d give them an edge in summer, but folks who enjoy predictable heat and humidity will strongly disagree and rate SNE as better. I give SNE a decisive win over Northwestern Europe in the winter season (MUCH less blah overcast weather here; far more sun).

  17. My all-time favorite violin concerto is on Harvard radio WHRB: Paganini – Violin Concerto No. 1 in D, Op. 6

    Brilliant masterpiece.

  18. IMO CPC is being influenced too much by the GFS on their 6-10 / 8-14.

    There is some uncertainty there because of massive model divergence in the medium range, but if I had to guess, it’s the GFS that’s most astray beyond week 1.

    As I mentioned to somebody earlier, with that much difference between models, I tend to just kind of leave my longer range outlook the same and not be influenced much by any of it…

    Tropics: Lots of hype (are we surprised? no) but one disturbance to watch which poses no threat to any land areas any time soon, if ever. And even when it does form, it’s got a lot of enemies out there. Not much happening in the tropics as we head into the 2nd half of the season.

  19. Departures from normal for temperature through the first 2 weeks of September…

    Boston: -2.2F
    Blue Hill: -1.6F
    Hartford: -2.7F
    Providence: -3.1F
    Worcester: -1.2F

  20. Jean, it was a performance by the LSO under the direction of Slatkin. I believe the soloist was Midori.

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