Tuesday July 22 2025 Forecast (7:29AM)

91 Comments

DAYS 1-5 (JULY 22-26)

High pressure sits overhead today, providing a very pleasant summer day. The high then slides offshore Wednesday and anchors for a while into late week, initiating a trend to warm then hot weather with more humidity Wednesday through Friday. Later Friday, a cold front approaches. The timing of this front will determine timing, coverage, and to some degree intensity of thunderstorm activity. Afternoon to early evening arrival would mean greater potential, while later evening arrival would lessen the potential. This is something to be fine-tuned over the next few days. Saturday’s weather will be less hot, still humid, and contain the chance of a few showers and thunderstorms as the frontal boundary slows down and becomes quasi-stationary while losing its identity, so this time I cannot call for a clear-out / dry-out situation. Will keep an eye on that.

TODAY: Sunny. Highs 72-79, coolest in coastal areas. Dew point upper 40s to middle 50s. Wind variable up to 10 MPH with coastal sea breezes.

TONIGHT: Clear. Patchy ground fog inland low elevations. Lows 48-55. Dew point below 50. Wind calm.

WEDNESDAY: Sunny. Highs 78-85, coolest Cape Cod / South Coast. Dew point rising through 50s to around 60. Wind S up to 10 MPH.

WEDNESDAY NIGHT: Mostly clear. Patchy fog interior low elevations. Lows 61-68. Dew point near 60. Wind S to SW under 10 MPH.

THURSDAY: Mostly sunny. Highs 78-85 South Coast, 86-93 elsewhere. Dew point in 60s. Wind SW 5-15 MPH.

THURSDAY NIGHT: Mostly clear. Lows 68-75. Dew point rises toward 70. Wind SW up to 10 MPH.

FRIDAY: Sunshine through midday. Clouds develop / arrive later in the day with a chance of showers and thunderstorms. Highs 90-97 except cooler South Coast / Cape Cod. Dew point near 70. Wind SW 10-20 MPH, but can be variable, strong, and gusty near any storms.

FRIDAY NIGHT: Variably cloudy. Chance of showers and thunderstorms during the evening. Patchy fog. Lows 70-77. Dew point near 70. Wind variable 5-15 MPH but can be strong and gusty near any storms.

SATURDAY: Sun / cloud mix. Pop-up showers and thunderstorms possible. Highs 83-90. Dew point upper 60s. Wind variable up to 10 MPH.

DAYS 6-10 (JULY 27-31)

A disturbance may bring additional showers and thunderstorms July 27 and/or July 28 with a trend toward mostly fair weather after that with only a brief shower / t-storm chance at some point from a passing disturbance next week. Temperatures somewhat variable but overall more seasonable.

DAYS 11-15 (AUGUST 1-5)

Early August indications are for large scale northwest flow – some up and down temps but nothing extreme, and mainly dry with a couple passing shower / t-storm chances from disturbances moving along the upper flow.

91 thoughts on “Tuesday July 22 2025 Forecast (7:29AM)”

  1. Good morning and thank you TK. You have up to 97 on Friday. That concerns me.
    Some Mets have been posting 97 the last couple of days.
    Hope it does not get that hot.

  2. Thanks, TK.

    Any time I see the phrase “high pressure slides offshore” in summer I get a bit sick to my stomach. We know what’s coming and it ain’t pretty.

    Just another 7 weeks to go of high heat and humidity chances, and for me I’ll only be in Boston for about 3 of them.

    1. This is not well understood. I climb the Whites frequently and I give each mountain the same level of respect regardless if it’s 1,800 ft (Mount Major) or 6,300 ft (Mt Washington).

      When I climb I live by a golfing adage that I have posted here before.

      Golfer’s Question: Which course is the toughest?
      Golfer’s Answer: The one you’re on!

  6. Thanks TK
    Mid to upper 80s dew points in the mid 60s the next three days down here in Virginia where I am vacationing. This is about as good as it gets down here in the the summer. Back to reality here on Friday temps in the mid 90s feeling like around 105.

  7. Interesting

    the 6Z NAM has 84 for Boston at 2PM Friday, while RDPS has 94, GFS has 98 and Euro has 97.

    What’s up with that? Why the NAM so cool???

    The others are just normal variance.

  8. July 22, 2025 will be 1.25 milliseconds shorter than 24 hours. Back on July 9th / 10th, it was 1.36 milliseconds shorter and the forecast is that on August 5th it will be 1.25 milliseconds shorter than 24 hours. The shortest ever recorded was somewhere back in the summer of 2024.

    Scientists are baffled. They have looked at atmospheric and climate models, melting polar caps, and changes in the earth’s liquid core. At this point, there are theories, but no hard conclusions. (BTW all the measurements of time are done using an atomic clock. I have always wanted to own one of those things. I think they’re available on Amazon.)

    There is some thinking that this trend, if you can call it that, might be slowing. One other factoid: just recently, a mere million-billion-zillion years ago I think I read that a day was either 9 or 10 hours long.

    1. Absolutely fascinating. Thank you.

      Mac was fascinated by time. I got him a watch a couple of decades ago that set itself by the atomic clock. I think. But GMT comes to mind. I’ve forgotten some of it. If his watch was off by even a few seconds, he’d put it in the window. Truthfully, I Suspect he’d prefer that to our watches and devices setting themselves

      Now I have to figure out how to tell my oldest that her birthday isn’t really 24 hours long. She already thinks she has a birthday month.

  12. There was a miracle today.
    I completed WORDLE in 3 guesses!!!!

    Now, SCLARKE will come on and post that he did it in 2!!!

    Perhaps today’s word was too easy? I would like to think I was improving. Time will tell. 🙂

        1. It is always like that. I see a ton of results and most every person seems to average four.

    3. Wow – I got it in three today as well. But being greedy, I wish I had made a slightly different second guess, because I was this close:
      https://ibb.co/Z6JNswMc

      Today’s word is in the top 1% of difficulty with a current average score of 5.4.

      It’s weird that there are all these 3s here!

      1. Very interesting indeed. The 1st and 2nd guesses are critical.
        Get a chunk of letters with those and one is in business.
        If after the 1st 2 guesses all one has is 1 or 2 letters NOT in the correct position it gets rough. Often times having to waste a guess just to find some more letters and hopefully 1 or 2 in the correct position.

        btw,, how does one get that little graphic you showed with the squares. Way cool.

        1. After you complete the game, you should see a button that says “Share.” Clicking that puts the image into the clipboard on your device. You can also do it later by clicking the icon in the top right that looks like a bar chart.

          Unfortunately, WordPress doesn’t seem to support pasting the image, so you have to go through the rigamarole of using something like imagbb,

          If this doesn’t make sense, I’ll provide some images of what I’m trying to describe.

          1. Please see post below.

            I’ll try tomorrow when I complete the wordle, but going in now I do NOT see that icon you mention. 🙂

      3. I think I asked before, but cannot remember the answer. Where do you find the difficulty level? And how do they determine it?

      1. Awesome. A win is a win. And love that you have internet service.

        What a terrific vacation you are having.

        1. We are, thank you !!

          Some of the places up here are really nice, but it’s the people, especially in this part of the trip. Lee’s relatives are some of the most welcoming, kindest people. And it’s great to have our daughters on this part of the trip.

  14. Thanks TK !

    Finally on the back side of the cold front that went through southern new England 48 hrs ago.

    It evolved to a closed low which gave us a decent rain yesterday and then an impressive backlash of rain after midnight last night.

    Improving weather moving forward.

      1. Hmm, maybe that will share your statistics instead of the most recent result.

        I don’t have an account, so never get there. I’m not sure how it works when you have an account, so really should stop confusing things! 🙂

  16. Model surface wind barbs for Friday show Basically West with just a slight Southerly component. This is a total land breeze.
    Concerned temps may over achieve.

    One limiting factor, 850 mb temps are mainly 19-20C tops.
    So, we should be OK if those temps remain that way.
    If they go up, well I don’t even want to think about it.

  17. Tom, it’s nice to enjoy your Canadian Maritime trip vicariously. Say hello to Brad Marchand if you see him up there. He’s a Nova Scotian.

    1. Will do 🙂 !

      I had, and I’m not exaggerating, a 15 minute conversation with one of Lee’s relatives about hockey and hockey night in Canada. She’s 84 years old 🙂

      We talked about Marchand and other Nova Scotia players in the NHL, Nathan McKinnon from the Avalanche and a longtime gold tender from the penguins and avalanche, Fleury ??

      What I would give to spend one night up here watching hockey with everyone. It’s an event.

  19. To JPDave’s comment about the NAM being “cooler” on Friday:

    When you see these maps that show temperatures for every airport, the model isn’t actually forecasting for that exact point. What you are seeing is what the model is showing for the nearest gridpoint. In the case of the NAM, those grid points are 12km apart, so the nearest one to Boston may be just offshore, so it will show up as cooler. The version of the NAM that only goes out 60 hours is higher resolution, with gridpoints only 3km apart.

    1. I forgot, WeatherBell shows you exactly where the gridpoints are in relation to the station. For Logan, on the NAM, it says that the point is actually 3.21 miles SE (136.9 degrees) from Logan itself. For the higher resolution NAM, the point is 1.2 miles WSW (246.9 degrees) from Logan.

      For the ECMWF, the point is 2.48 miles N (6.1 degrees) from Logan.

      For the GFS, it’s 1.15 miles SSW (207.5 degrees).

    2. OH, very interesting. I should have realized that, but did not.
      THANK YOU.
      However. ALL areas in SNE are signifcantly cooler on the NAM
      than say the Euro, GFS and ICON.

    1. A bit too early in my opinion, but then again schools start earlier than they used to, and we get primed for fall earlier and earlier.

      The first pumpkins will be on sale the last week of August, so I guess that could justify Starbucks’ decision.

      I return from England around that time. I do look forward to seeing New England pumpkins. The ones they have over there are very different and not as appealing.

      1. Don’t get me started. Likely DD will start their Pumpkin Spice soon as well.

        If it were left up to me, these drinks would start AFTER Labor Day at the earliest. Oh well.

        1. If it were up to me they would NEVER start.
          But, apparently many people love the stuff. Oh well, No one is making me purchase it. 🙂 Hope they all enjoy it.

    2. Never cared for Pumpkin Spice. In fact I think it totally ruins
      the coffee. 🙂

  21. I guess that really was Ozzy Osbourne’s final show a few weeks ago. He just died at the age of 76.

      1. I have to provide my email address to read the article…NO THANKS!!!

        There was a time that I couldn’t read Joshua’s articles without registering or whatever.

      1. He sure was . I blasted shot in the dark on the way home from the gym .

  22. ECMWF is back to the idea I had a couple days ago of the front making it through late Friday enough to allow high pressure in Saturday for a basically rain-free day, then the front shifting back north with a disturbance from the west for unsettled weather returning by Sunday PM.

  23. That “sort-of” tropical disturbance that social media headlines were hyping as the next developing system has dissipated and now tropical cyclone formation is not expected in the Atlantic in the next 7 days. Surprise? NO.

  24. For Friday, Euro has high temps of 96-98 all across Eastern MA with basically A West Wind (just a tad South of West) and dps 63-66 across the area. HOW high will it go????

      1. Well yes, that was your forecast from this morning.

        90, fine. 97 , please no!!!!

        2. The range is for the whole area .. I think places like Fitchburgh, Norwood, etc., would have the best shot at breaking 95.

          Boston’s chance would go up if the wind went more WNW, but if that happened, the dew point would go down. Don’t think we’re going there this time though.

  25. Here are Boston’s highest recorded temps for July 25.

    The record will remain untied and unbroken, IMO.

    96 07/25/1882
    95 07/25/2001
    95 07/25/1921
    94 07/25/1987
    94 07/25/1963
    94 07/25/1892
    93 07/25/1989
    93 07/25/1965
    93 07/25/1910
    92 07/25/2016

    1. You are so certain.
      Wish you had said I don’t think it will be tied or broken.
      Independent of you being correct or not.

      1. Well, that’s basically what I did say. The “IMO” covers it. 🙂

        Be careful with model #’s and news-hype.

        They also drive the freaking “feels like” temps into people’s head to the point they pretty much think it’s the actual temp. Not a fan of “feels-like”. Never been a fan. Never WILL be a fan. I do mention the “heat-index” and “wind-chill” now and then, but in a guide kind of way, and NOT at the expense of the actual temperatures.

        1. Isn’t “feels like”, “heat index” and “wind chill” one in the same?

        2. This drives me bonkers!

          If the air temperature is 94F and the “Mr. McFeely” temperature is 100F, what does that mean? I guess it means that it feels as if it were 100F under some other conditions. What are the other conditions? Is there some standard situation that’s being used?

          I think part of the problem is using degrees F for this other measurement. It’s misleading. There should be a different scale than temperature, say Miserableness. Give it a range that won’t be confused with temperature, such as 200 – 300.

          “A Severe Miserableness Warning has been issued for your area. Expect Miserableness in the 278-284 range. For your sanity, and that of others, keep away from other people.”

          1. Not doubting or questioning you for a second but curious. What is the difference between heat index and wind chill. I rarely pay attention to either

          2. Excellent!!!!
            And that could also apply to cold/windy conditions as well.

            While we’re at it, what about a hot/humid day that is very windy. Any adjustment to the “heat index”??? I think not.

  26. The Red Sox should implore the baseball commissioner to cancel the All-Star break. Seriously, what we’re witnessing looks like a repeat of last year and the year before. Were it not for Abreu the other night (2 homers) and a hanging curve ball that Bregman hit out to salvage a game against the Cubs, it could have been worse.

    Of course, everything can change. But the problem, in my view, remains a relative lack of talent on offense and pitching and poor fundamentals. This will show against good teams. And that’s who they’re facing now.

    2. How many times have you written them off this season already? Despite this, they would still be in the playoffs in the season ended today.

  27. 56F with a dp of 51F up here.

    It struggled to get to 70F today with increasing sunshine as the day wore on.

    They are forecasting 26C tomorrow, so an 8-10F warmup compared to today.

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