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Tuesday, November 25, 2025

November 25, 2025

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA TUESDAY, NOVEMBER 25, 2025 ALL TIMES ARE…

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BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA TUESDAY, NOVEMBER 25, 2025 ALL TIMES ARE IN EASTERN STANDARD TIME (EST) SUNRISE: 0647E SUNSET:  1615E OVERCAST AND BREEZY DAY ON TOP OF BLUE HILL WITH MILD TEMPERATURES…. Clouds, mainly of the mid level variety, have dominated the sky today. While there has been no precipitation falling yet, it is still a rather dim day with a slight dampness to the air. Despite temperatures on the mild side, the combination of lack of sun, dampness, and gusty breeze, it’s making it feel a bit chilly out there today. As mentioned, temperatures are on the mild side again today. Readings have reached the upper 40s by early this afternoon. Dew point values have been gradually creeping up from the low 30s early this morning to around 40F by early this afternoon. The wind has been fairly steady out of the southwest and south- southwest. The average speed for the day so far is around 14mph. Gusts have been occasionally exceeding 20mph since early this morning. The peak gust for the day so far is 30mph, which occurred just before 10am this morning. Visibility is quite decent today despite the cloud cover. We had about 50 miles of visibility early this morning, but it improved to around 70 miles by mid to late morning, where it remains into early this afternoon. The maximum temperature so far today is 48F degrees, which is 1 degree above the normal high of 47F. The minimum temperature since midnight is 35F degrees, which is 4 degrees above the normal low of 31F. ————————————————————– Today’s Observations: 7 A.M. Weather: Overcast altostratus, few breaks in overcast distant NE-S Temperature: 40F; Dew Point: 31F; Relative Humidity: 70% Wind: SSW @ 14G20 kts Sea-level pressure: 1025.0 mb; 30.27 in. Hg: rising, then more rapidly Visibility: 50 miles 6-hr Max temp: 40F 6-hr Min temp: 35F 24-hr Precip: 0.00 inches 24-hr Snowfall: 0.0 inches BHO SA 1155 E130 OVC 50 250/40/31/2114G20/027/ FEW BINOVC DSNT NE-S/ 8/02/ 53005 10040 20035 10 A.M. Weather: Overcast altocumulus/altostratus Temperature: 44F; Dew Point: 35F; Relative Humidity: 70% Wind: SSW @ 15G26 kts, peak wind SSW 30mph at 9:49 A.M. Sea-level pressure: 1024.5 mb; 30.25 in. Hg: rising, then falling Visibility: 70 miles 3-hr Precip: 0.00 inches 3-hr Snowfall: 0.0 inches BHO SA 1455 E130 OVC 70 245/44/35/2115G26/025/ PK WND 2126/49/ 8/07/ 58005 1 P.M. Weather: Overcast altocumulus/altostratus, few stratocumulus distant ESE-S-SW Temperature: 48F; Dew Point: 40F; Relative Humidity: 70% Wind: SW @ 10G18 kts Sea-level pressure: 1022.7 mb; 30.20 in. Hg: falling, then more rapidly Visibility: 70 miles 6-hr Max temp: 48F 6-hr Min temp: 40F 6-hr Precip: 0.00 inches 6-hr Snowfall: 0.0 inches BHO SA 1755 E120 OVC 70 227/48/40/2210G18/020/ FEW SC DSNT ESE-S-SW/ 8/57/ 58018 10048 20040 ————————————————————– SUMMARY FOR MONDAY, NOVEMBER 24, 2025 TEMPERATURE (DEGREES F) MAX…….49   NORMAL…..47 MIN…….33   NORMAL…..31 MEAN……41   NORMAL…..39 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+2 TOTAL DEPARTURE FOR THE MONTH………………………-34 [-1.6 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026) TOTAL HEATING UNITS FOR YESTERDAY…………….24  DEPARTURE……..-2 TOTAL HEATING UNITS FOR THE MONTH……………563  DEPARTURE…….+33 TOTAL HEATING UNITS FOR THE SEASON…………..974  DEPARTURE…….-67 TOTAL HEATING UNITS LAST SEASON TO DATE………787  DEPARTURE……+187 COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025) TOTAL COOLING UNITS FOR YESTERDAY……………..0  DEPARTURE………0 TOTAL COOLING UNITS FOR THE MONTH……………..0  DEPARTURE………0 TOTAL COOLING UNITS FOR THE SEASON…………..756  DEPARTURE…….+79 TOTAL COOLING UNITS LAST SEASON TO DATE………768  DEPARTURE…….-12 PEAK WIND GUST (MPH): Note: Instruments designated #1 = Main Tower, #2 = South Tower, F420C, Contacting, Merlin, and Richards are all on Main Tower. E=Estimated *=Last of multiple occurrences F420C (Official)………..30 NW   @   10:01 A.M. VECTOR #1 (1-Sec)……….31 NW   @   10:01 A.M. VECTOR #2 (1-Sec)……….31 NW   @   10:52 A.M. DAVIS #1……………….27 NW   @   10:01 A.M. DAVIS #2 ………………27 NNW  @   10:42 A.M. RMY #1 (Instantaneous)…..30 NW   @   10:51 A.M. RMY #2 (Instantaneous)…..31 NW   @   10:52 A.M. MERLIN…………………29 NW RICHARDS (C5C) (Inst)……29 NW   @   10:01 A.M. FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL………………19 NW   @   10:14 A.M. MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..20 NNW  @   10:53 A.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..21 NW   @   10:53 A.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………21 NW   @   10:53 A.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………20 NNW  @   10:53 A.M. MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..20 NNW  @   10:53 A.M. MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..21 NW   @   10:53 A.M. MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………20 NNW  @   10:53 A.M. AVERAGE WIND SPEED AND DIRECTION: CONTACTING/OFFICIAL………9.6 NW [231 total miles] VECTOR #1……………….9.9 VECTOR #2………………10.6 DAVIS #1……………….10.1 WNW DAVIS #2……………….10.2 NW RMY #1………………….9.7 WNW RMY #2…………………10.3 WNW RICHARDS (C5C)………….10.2 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.15 TOTAL PRECIPITATION FOR THE MONTH…………..1.77 DEPARTURE…..-1.63 TOTAL PRECIPITATION FOR THE YEAR (2025)…….44.08 DEPARTURE…..-3.48 SNOWFALL (INCHES) THROUGH THIS MORNING (EST): TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE…..-0.1 TOTAL SNOWFALL FOR THE MONTH………………..0.1 DEPARTURE…..-1.0 TOTAL SNOWFALL FOR THE SEASON (2025-2026)…….0.1 DEPARTURE…..-1.7 ————————————————————– PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN)/SUN(%)/PEAK GUST/VEC1/RMY GUST PEAK GUST: F420C (Official) VEC1: Vector #1 1-second gust RMY:  R.M. Young #1 wind gust recording system (Instantaneous) TSTM: Thunderstorm day (thunder heard some time during day) ….: Data not yet available, records not finalized M:    Missing data 11/1  56/38/47/+0/0.00/0.0/619/100       50 W   VEC1 50 W   RMY 50 11/2  53/33/43/-4/0.00/0.0/617/100       23 WNW VEC1 23 WNW RMY 24 11/3  54/42/48/+2/0.16/0.0/012/02        41 WNW VEC1 41 W   RMY 46 11/4  54/42/48/+2/0.00/0.0/605/99        52 NW  VEC1 52 NW  RMY 54 11/5  56/39/48/+2/0.06/0.0/091/15        50 W   VEC1 47 W   RMY 52 11/6  50/34/42/-3/0.02/T/449/74          48 WNW VEC1 48 WNW RMY 49 11/7  52/31/42/-3/0.04/0.0/448/74        43 SSW VEC1 42 SSW RMY 47 11/8  60/45/53/+8/0.18/0.0/307/51        32 WNW VEC1 33 WNW RMY 33 11/9  61/46/54/+10/0.15/0.0/216/36       33 ESE VEC1 34 ESE RMY 35 11/10 54/36/45/+1/0.44/0.0/000/00        32 W   VEC1 31 W   RMY 31 11/11 37/30/34/-9/T/T/131/22             46 WNW VEC1 44 WNW RMY 47 11/12 44/30/37/-6/T/T/148/25             32 W   VEC1 32 W   RMY 33 11/13 47/32/40/-3/T/0.0/071/12           32 NW  VEC1 32 NW  RMY 34 11/14 46/32/39/-3/0.00/0.0/495/84        30 NNW VEC1 30 NNW RMY 30 11/15 44/28/36/-6/0.37/0.1/522/89        26 SSE VEC1 26 SSE RMY 26 11/16 52/33/43/+1/0.19/T/280/48          50 NW  VEC1 49 W   RMY 53 11/17 41/29/35/-6/0.00/0.0/495/85        45 WNW VEC1 45 WNW RMY 46 11/18 46/30/38/-3/0.00/0.0/574/99        31 WNW VEC1 32 WNW RMY 33 11/19 44/27/36/-5/0.00/0.0/527/91        20 NNW VEC1 19 NW  RMY 20 11/20 45/27/36/-4/0.00/0.0/300/52        16 NNW VEC1 16 NNW RMY 16 11/21 45/34/40/0/0.00/0.0/075/13         28 SW  VEC1 28 SW  RMY 26 11/22 45/31/38/-2/0.16/0.0/046/08        22 NNW VEC1 22 NNW RMY 23 11/23 39/28/34/-5/T/T/154/27             18 WNW VEC1 19 WNW RMY 19 11/24 49/33/41/+2/T/T/506/89             30 NW  VEC1 31 NW  RMY 30 11/25 The low since midnight is 35F, the daily normal low is 31F. ————————————————————– NOVEMBER DAILY RECORDS TO DATE NONE. ————————————————————– DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR NOVEMBER 25 HIGH 71 IN 1979 LOW 13 IN 1938 PRECIP 3.10 INCHES IN 1983 SNOWFALL 4.0 INS IN 1938 PEAK GUST 94e E IN 1950 RECORDS FOR NOVEMBER 26 HIGH 66 IN 1979 LOW 6 IN 1938 PRECIP 2.39 INS IN 1950 SNOWFALL 3.0 INS IN 1974 PEAK GUST 78 SSE IN 1964 TODAY’S REPORT PREPARED BY: Matt Douglas
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Blue Hill Observatory & Science Center · Legal

Data Use & Privacy Policy

Please read the full Policy before accessing Observatory data · Effective January 1, 2025

Notice: By accessing, downloading, or using any Blue Hill Observatory data or services, you unconditionally accept and agree to be bound by this Policy in its entirety. If you do not agree, you may not access or use Observatory data.
Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
Part I — Data Use Policy
§ 01

Ownership and Proprietary Rights

All observational records, compiled datasets, metadata, database structures, and related materials provided by the Blue Hill Observatory & Science Center are the exclusive property of the Blue Hill Observatory & Science Center. The Observatory has maintained continuous weather observations at the summit of Great Blue Hill since 1885, and the entirety of that record — its compilation, structure, curation, and organization — constitutes a proprietary database protected under applicable United States law, including copyright law and common law database protections.

All rights not expressly granted in this Policy are reserved by the Observatory. No access to or use of Observatory data shall be construed as a waiver of any rights or as a license to use data beyond the scope expressly stated herein.

§ 02

Governing Law and Jurisdiction

This Policy shall be governed by and construed in accordance with the laws of the Commonwealth of Massachusetts, without regard to its conflict of law provisions. For interactions with international users, this Policy shall apply to the maximum extent permitted by applicable local law.

Any dispute arising from or related to this Policy shall be subject to the exclusive jurisdiction of the state and federal courts located in Norfolk County, Massachusetts. By accessing Observatory data, all users consent to personal jurisdiction in Massachusetts and waive any objection to the venue or inconvenience of such forum.

§ 03

Permitted Uses

Observatory data are made available for the following limited, non-commercial purposes only:

  • Personal study and analysis
  • Educational classroom use
  • Student projects
  • Non-commercial academic research
  • Publication of analyses, figures, models, or conclusions derived from the data, subject to the attribution requirements of Section 4

All other uses require prior written authorization from the Observatory.

§ 04

Attribution Requirement

Any use of Observatory data in any published, presented, or publicly distributed work must include the following verbatim acknowledgment:

“Data provided by the Blue Hill Observatory & Science Center, Milton, Massachusetts. Continuous weather observations since 1885.”

Failure to include proper attribution is a material violation of this Policy.

§ 05

Prohibited Uses

Unless explicitly authorized in writing, Users may not:

  • Resell, license, sublicense, or commercially exploit Observatory data in any form
  • Redistribute the dataset in whole or in part to any third party
  • Publish the dataset for download by third parties
  • Host, mirror, or archive the dataset on any external website, repository, or storage service
  • Upload the dataset to any public or institutional data repository
  • Provide the data through APIs, automated services, or subscription platforms
  • Incorporate the data into any commercial product, software, application, or service
  • Use the data for AI or machine learning systems intended for commercial use or external distribution
  • Use the data to create derivative datasets that enable reconstruction of the underlying observations
§ 06

Commercial Licensing

Organizations seeking to use Observatory data for commercial purposes must obtain a license prior to any such use. Licensing inquiries: data@bluehill.org.

§ 07

Automated Access

Automated scraping, bulk harvesting, or systematic downloading of Observatory data is strictly prohibited without prior written authorization.

§ 08

Enforcement and Remedies

Violation of this Policy may result in immediate revocation of data access, pursuit of legal remedies available under United States law, and referral to applicable authorities. The Observatory reserves all rights to seek injunctive relief, damages, and attorneys’ fees in connection with any unauthorized use of its data.

Part II — Privacy Policy
§ 09–10

Scope & Information Collected

This section governs the collection, use, storage, and disclosure of personal information from visitors to the Blue Hill Observatory website and users of its data services. The Observatory may collect contact information (name, email, organization) when voluntarily submitted, usage data including IP addresses and pages visited, and data download records.

§ 11–12

How We Use Information & Retention

Information is used solely for: responding to inquiries and licensing requests; monitoring and enforcing compliance with this Policy; improving website performance; and communicating Observatory news to opted-in users. The Observatory does not sell, rent, or share personal information with third parties for marketing purposes. Data access records may be retained indefinitely for compliance and enforcement purposes.

§ 13

International Users and Data Transfers

The Observatory is located in the United States. International users acknowledge their information will be processed in the United States under U.S. law. Users requiring specific data processing agreements under non-US law must contact data@bluehill.org before accessing data.

§ 14–16

Cookies, Security & Children’s Privacy

The Observatory website may use cookies for analytics and functionality. By continuing to use the site, users consent to cookie use. The Observatory implements reasonable measures to protect personal information but cannot guarantee absolute security. Observatory data services are not directed at children under 13.

Part III — General Provisions
§ 17–20

Modifications, Severability, Entire Agreement & Contact

The Observatory reserves the right to modify this Policy at any time. Updated versions will be posted at bluehill.org. Continued use of Observatory data following any modification constitutes acceptance of the revised Policy. This Policy constitutes the entire agreement between the User and the Observatory. Questions and licensing inquiries: Blue Hill Observatory & Science Center, Milton, Massachusetts — data@bluehill.org

By accessing, downloading, or using any Blue Hill Observatory data or services, you acknowledge that you have read, understood, and agree to be bound by this Policy.
Effective January 1, 2025 · Blue Hill Observatory & Science Center · Milton, Massachusetts
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