Tuesday December 9 2025 Forecast (7:24AM)

55 Comments

DAYS 1-5 (DECEMBER 9-13)

No notable changes for today’s discussion from yesterday’s. A warm front approaches today and tonight and a short wave disturbance aloft comes through this evening. While there is dry air to overcome at mid levels, this feature is expected to produce a brief period of snow late evening into the overnight hours from west to east, except mix to rain closer to Cape Cod where the temperature will be borderline between supporting frozen and liquid precipitation. If any accumulation of snow occurs with this, it will be minor and mostly away from the coast northwest of Boston. We end up in the “warm” sector for Wednesday, not an overly warm day by December standards, but milder than recent days for sure. A cold front trailing low pressure passing to our north will sweep through with the air mild enough for rain showers in the evening, again progressing west to east but lasting no more than a couple hours in any one location. This front will lead a colder air mass back into our region for Thursday through Saturday. Thursday’s weather will be windiest, with a gradual abatement of the wind on Friday and a more tranquil Saturday as high pressure builds toward the region. Upper level low pressure crossing the region, combined with limited Great Lakes moisture, can result in a few snow showers around the area Thursday. This threat will diminish then vanish for late week as the upper low departs and the wind relaxes.

TODAY: Sun gives way to clouds. Highs 28-35. Wind variable to SE up to 10 MPH.

TONIGHT: Cloudy evening into overnight with a period of light snow/mix except mix/rain South Coast. Snow accumulation of up to but mainly under 1/2 inch can occur mainly inland areas to the north of I-90. Watch for icy spots on untreated surfaces mid to late evening except Cape Cod / Islands. Lows 20-27 except steady 28-35 southeastern MA and southern RI evening, rising slowly overnight. Wind SE under 10 MPH shifting to SW up to 10 MPH.

WEDNESDAY: Partly sunny morning. Mostly cloudy afternoon. Late-day rain showers from west to east, but may be mixed with snow in higher elevations from north central MA through southwestern NH. Highs 38-45. Wind SW 5-15 MPH.

WEDNESDAY NIGHT: Mostly to partly cloudy. Rain showers possible in eastern areas in the evening. Icy areas on untreated surfaces overnight. Lows 28-35. Wind NW 5-15 MPH.

THURSDAY: Sun/cloud mix. Chance of snow showers. Highs 32-39. Wind NW 10-20 MPH, higher gusts.

THURSDAY NIGHT: Partly cloudy. Chance of a snow flurry. Lows 17-24. Wind NW 5-15 MPH.

FRIDAY: Partly to mostly sunny. Chance of a snow flurry early. Highs 34-41. Wind NW 5-15 MPH with higher gusts, gradually diminishing.

FRIDAY NIGHT: Partly cloudy. Lows 11-18 except 18-25 coastal and urban areas. Wind W under 10 MPH.

SATURDAY: Partly cloudy. Highs 31-38. Wind W up to 10 MPH.

DAYS 6-10 (DECEMBER 14-18)

Low pressure brings a chance of snow except snow/mix/rain South Coast during December 14, this being the next in a series of clipper-style low pressure areas. Watching for another system with a precipitation threat around December 17 but less confident on timing. Temperatures mostly below normal for the period.

DAYS 11-15 (DECEMBER 19-23)

Divergence in medium range guidance – nothing new there – doesn’t help forecast confidence atop the normal lower confidence for a period of time this far in the future. For now, the same idea applies. Watching for a brief warm-up from a Great Lakes low then a return to the colder pattern and back on the watch for clipper disturbances as the cold air wins out over a warmer area of air to our south.

55 thoughts on “Tuesday December 9 2025 Forecast (7:24AM)”

  1. Thanks TK !

    Wordle: 5 (I think I have bought season tickets for this part of the train)

    I actually am interested in this weekend system. Its by far, the best opportunity for Boston and SE Mass thus far, this cold season)

    Yes, it could get stretched and go south of us. I think the Euro is way overphased.

    We’ll just have to see where the boundary of very cold to cool/mild sets up. If it doesn’t quite get through New England, than this low may ripple along the south coast and that would be too far north.

    Reply

  3. Sorry the power is out JpDave !

    Tough overnight to go without power, it is really cold out !!!

    If I read what you wrote correctly, sounds like your house is retaining warmth fairly well.

    Reply

    1. Thanks Tom. Still out.
      One good thing as long as my phine has power and laptop has battery juice I am in business for awhile as it took me 1/2 hour to get laptop and phone to work together for internet.

      It’s about 12 or 13 here. my equipment needs internet connection.

      Reply

  4. Yesterday’s anomaly at Logan was -11.3F for the day and brings the month to -7.7F

    So, call it -8F for about 25% of the month, for a full month contribution of -2F. The remaining 75% of the month would have to be 3F above just to bring this to even, but we talk about next weekend’s system, the cold air behind that one might be even colder than what we have seen so far.

    I think even on December 9th, the odds favor the month ending below avg unless its 70F the last week of the month.

    The question is …. is there a warm enough spell in there to land it in the -1F to -4F range or are we headed for -5F to oh, maybe -10F range for the entire month?

    Reply

  5. Thanks TK.

    Hate to see but the pattern is just not going to give us anything major right now. Let’s see past the medium range but not looking good.

    Sorry JP, that’s beyond annoying.

    Reply

    1. I think that weekend possibility could be productive.

      I’m not promising an 80% chance to deliver in Boston and along the coast.

      But, there is a chance for something more than a dusting or a coating.

      Reply

      1. Welcome aboard!! Will we be co-engineers or we be joined? I have a sense we will be joined.

        power just restored. thank you.

        Reply

  9. 15 here now that my equipment is up and running, can’t tell what it was overnight, but nearby locations were showing 12 and 13s earlier.

    Reply

  11. So, in case you didn’t see my inquiry on the previous blog.

    I lost power for 7 hours, but it is very cold out.
    My question is, do I have to toss any food in the fridge or freezer?
    I felts some items when the power came on and everything still felt cold.

    Many thanks

    Reply

    1. I found this. Be careful not to open either.

      https://www.goodhousekeeping.com/food-recipes/cooking/a43688230/food-safety-tips-during-power-outage/?utm_source=google&utm_medium=cpc&utm_campaign=mgu_ga_ghk_md_pmx_hybd_mix_us_18399044072&gad_source=1&gad_campaignid=18396202201&gbraid=0AAAAADA2MEq1yl0xc7G8qguFzNTkkEwwy&gclid=Cj0KCQiArt_JBhCTARIsADQZayn6eq_mITDQvrpv8o_Re70lmqBM5ftQGjarAqHXRlTUzskczqOLEMMaAhV1EALw_wcB

      If you don’t have internet it says 4-6 for fridge and 48 for full freezer. That’s hours.

      Still looking

      Reply

      1. Food stays safe in a refrigerator for about 4 hours during a power outage if the doors are kept closed. Perishable items should be thrown out if the power is out for longer than 4 hours, or if a thermometer shows the temperature has risen above \(40\text{\degree F}\). A full freezer can keep food frozen for up to 48 hours, and a half-full freezer for about 24 hours. For the refrigerator Keep the refrigerator and freezer doors closed as much as possible to maintain the cold.Food is generally safe for about 4 hours, provided the doors stay shut.If the power is out longer than 4 hours, put perishable food in a cooler with ice or frozen gel packs.Throw out any perishable food that has been above \(40\text{\degree F}\) for more than two hours.If a food item has an unusual smell, color, or texture, throw it out. For the freezer A full freezer can keep food frozen for up to 48 hours.A half-full freezer can keep food frozen for up to 24 hours.If the power is out for more than 48 hours (for a full freezer) or 24 hours (for a half-full one), you may need to discard the food.You can refreeze food if it still contains ice crystals or is at or below \(40\text{\degree F}\).Food that has been thawed but is still at \(40\text{\degree F}\) or below can be safely cooked and then refrozen (with the exception of some items).If you’re unsure about the safety of the food, throw it out. 

        Reply

      2. Thanks. Power came back at 8. Was out a total of 7 hours.
        When it came on, I felt items and they were plenty cold.
        Fridge is in a pantry exposed to outside walls, so it was pretty chilly in there. That is why I think it would be longer than
        the 4-6 hours listed.

        Reply

    1. Brrr, but you still have snow cover? correct? makes a huge difference. Even without snow cover, you would still be colder.

      Reply

    1. Nice. Since my 2 consecutive fail debacle, I I have had
      3 3s and 3 4s out of 6. (meybe there was 1 5 don’t remember exactly) I just don’t understand that at all.
      Was it the words then? My frame of mind? Mind wandering?
      I don’t know. Weird.

      Reply

      1. I think maybe some of all of those but mostly it seems to be the letters you have from the start. I honestly don’t see anyone ever getting consistent numbers. My guess is it simply isn’t possible

        Reply

  14. Thank you TK.

    5 overnight. Up to 9 now. It’s a perfect 9 since it’s Mac’s and my 47th anniversary

    I tried to find the number of snowstorms on Dec 9 but can’t seems to. I know it was significant in 1978 including thunder snow over the Charles from out Hyatt Cambridge room.

    Reply

  15. Thanks TK
    Hard to believe 20 years ago today a storm went through bombogensis with hurricane force wind gusts on the Cape and Islands along with a period of heavy snow for eastern SNE.

    Reply

    1. I remember it. I also recall a nice snowstorm in 2017 along with a sustained period of cold. (Early 2018 was really cold, too). December 2017 had 7 days that didn’t get out of the 20s. It wasn’t like 1989, which had 18 days that didn’t get out of the 20s: https://weatherspark.com/h/m/26197/1989/12/Historical-Weather-in-December-1989-in-Boston-Massachusetts-United-States

      December 1980 was somewhat similar, but not quite as sustained along with a number of cold days that got out of the 20s but barely/just low 30s).

      Thus far, while I haven’t experienced it as that cold, this December has been significantly colder than normal, as Tom and Mark point out with the anomaly differential. Nonetheless, we’ve only had 2 days that haven’t gotten out of the 20s. We may add 1 today and 1 or 2 early next week. But it’s not at all etched in stone we get to 7 by the end of the month, as we did in 2017.

      We’ll see what happens moving forward. By the way, I use the word “we” but I’m referencing Boston. I realize that SNE weather isn’t defined by what happens in Boston.

      Reply

  16. Thanks TK.

    15F here now after a low of 7F in Coventry.

    Really impressive cold for late autumn!

    Dave, glad you got your power back. If you didnt open the door your food should be fine. I might be more concerned if it was middle of July.

    Reply

          1. Yes. This possible very short term snow was from a minor disturbance approaching from the west, causing a chance of a little warm air advection snow = some slight mild air overrunning today’s slowly retreating cold air?

            Reply

  20. It’s nothing more than a guess at this point.

    I think Boston is going to get measurable snow from the weekend system, to the point where it will meet advisory criteria and also Marshfield sees that as well.

    I like most of the signs for 500 mb to our flow, which makes the tight Euro unlikely.

    I think that very cold boundary with cool/mild air sets up just south of the south coast and a ripple of low pressure will through enough moisture all the way to the Mass Pike and points south for a quick hitting, advisory level snowfall.

    Reply

  21. Thank you TK!

    Nice job Wordlers! I am happy to say that Vicki and I have a date in the lounge car with spiked hot chocolate and Hallmark movies.

    Reply

  24. I believe that my “count” will continue beyond Sunday regardless as 6” is a lot to ask for even under the best of circumstances.

    Boston has yet to receive (0.1”) measurable snowfall and that is no guarantee for Sunday either. Snow events love to suppress themselves south of us as it is.

    Reply

    1. Watchout Philip.

      The latest 12z GFS basically has nothing from this weekend’s low, which means 10-20 inches is in the cards.

      Reply

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