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Tuesday, November 4, 2025

November 4, 2025

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA TUESDAY, NOVEMBER 4, 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 4, 2025 ALL TIMES ARE IN EASTERN STANDARD TIME (EST) SUNRISE: 0622E SUNSET:  1633E PLENTY OF SUNSHINE TODAY, BUT VERY WINDY FOLLOWING A FRONTAL PASSAGE LAST EVENING…. A front moved through the area late last evening bringing a band of moderate rain showers. This system was pretty potent and brought small hail, thunder, and lightning to some communities. Here on the Hill only rain was observed. However everyone shared in strong gusty winds as the front pushed through. 0.16″ of rain was measured from this system, most of which falling in the same hour between 9-10pm. Today strong cold air advection is taking place which is helping to mix down a strong low-level jet aloft. Our front it was attached to a developing low pressure system that is currently bombing out well to our northeast, and will be a very formidable storm system for Newfoundland. For us here, we’re left with strong winds as a result of the above mentioned low level jet and tight pressure gradient. Temperatures are again near seasonable levels, but it feels colder due to lower dew point levels and the gusty wind. Readings have reached the mid 50s by early this afternoon, but the wind chill makes it feel more like the mid 40s. The dew point has been gradually falling as the cold air advection continues. Values have fallen from the mid 30s early this morning to the upper 20s by early this afternoon. The wind has been the main story today. A west-northwest to northwest wind has been averaging at around 21mph for the day so far. Gusts have been frequently exceeding 40mph since the mid morning hours. The peak gust so far for the day is 52mph, which occurred just before the 1pm observation. Visibility is excellent today with a view of 70-80 miles through the day! The maximum temperature so far today is 54F degrees, which is equal to the normal high of 54F. The minimum temperature since midnight is 42F degrees, which is 5 degrees above the normal low of 37F. ————————————————————– Today’s Observations: 7 A.M. Weather: Clear, few stratocumulus distant S-W-N-ESE, few altocumulus distant NNE-NE Temperature: 44F; Dew Point: 34F; Relative Humidity: 68% Wind: WNW @ 18G29 kts, peak wind WNW 35mph at 6:30 A.M. Sea-level pressure: 1008.5 mb; 29.78 in. Hg: rising, then more rapidly Visibility: 70 miles 6-hr Max temp: 44F 6-hr Min temp: 42F 24-hr Precip: 0.16 inches BHO SA 1155 CLR 70 085/44/34/3018G29/978/ FEW SC DSNT S-W-N-ESE FEW AC DSNT NNE-NE PK WND 2930/30/ 8/550 53017 70016 10044 20042 10 A.M. Weather: Clear, few stratocumulus all quadrants Temperature: 51F; Dew Point: 32F; Relative Humidity: 48% Wind: NW @ 19G33 kts, peak wind WNW 48mph at 9:17 A.M. Sea-level pressure: 1010.9 mb; 29.85 in. Hg: rising, then more slowly Visibility: 80 miles 3-hr Precip: 0.00 inches BHO SA 1455 CLR 80 109/51/32/3119G33/985/ FEW SC ALQDS PK WND 3042/17/ 8/500 51024 1 P.M. Weather: Scattered stratocumulus, virga distant WNW-N Temperature: 54F Dew Point: 28F; Relative Humidity: 36% Wind: NW @ 25G42 kts, peak wind NW 52mph at 12:53 P.M. Sea-level pressure: 1012.0 mb; 29.88 in. Hg: rising, then more slowly Visibility: 80 miles 6-hr Max temp: 54F 6-hr Min temp: 44F 6-hr Precip: 0.00 inches BHO SA 1755 40 SCT 80 120/54/28/3125G42/988/ VIRGA DSNT WNW-N PK WND 3145/53/ 8/500 51011 10054 20044 ————————————————————– SUMMARY FOR MONDAY, NOVEMBER 3, 2025 TEMPERATURE (DEGREES F) MAX…….54   NORMAL…..55 MIN…….42   NORMAL…..38 MEAN……48   NORMAL…..46 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+2 TOTAL DEPARTURE FOR THE MONTH……………………….-2 [-0.9 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026) TOTAL HEATING UNITS FOR YESTERDAY…………….17  DEPARTURE……..-2 TOTAL HEATING UNITS FOR THE MONTH…………….57  DEPARTURE……..+1 TOTAL HEATING UNITS FOR THE SEASON…………..468  DEPARTURE…….-99 TOTAL HEATING UNITS LAST SEASON TO DATE………420  DEPARTURE…….+48 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………763  DEPARTURE……..-7 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)………..41 WNW  @   10:23 P.M. VECTOR #1 (1-Sec)……….41 W    @   10:06 P.M. VECTOR #2 (1-Sec)……….43 WSW  @   10:06 P.M. DAVIS #1……………….40 W    @   10:23 P.M. DAVIS #2 ………………45 W    @   10:06 P.M. RMY #1 (Instantaneous)…..46 W    @   10:06 P.M. RMY #2 (Instantaneous)…..47 WSW  @   10:06 P.M. MERLIN…………………39 W RICHARDS (C5C) (Inst)……41 W    @   10:06 P.M. FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL………………27 WNW  @   10:24 P.M. MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..27 W    @   10:07 P.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..28 WNW  @   10:25 P.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………29 W    @   10:07 P.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………29 WNW  @   10:06 P.M. MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..26 W    @   10:07 P.M. MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..27 WSW  @   10:06 P.M. MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………26 W    @   10:07 P.M. AVERAGE WIND SPEED AND DIRECTION: CONTACTING/OFFICIAL……..11.3 S [270 total miles] VECTOR #1………………12.4 VECTOR #2………………12.9 DAVIS #1……………….11.8 SSW DAVIS #2………………….M RMY #1…………………12.0 SSW RMY #2…………………13.0 SSW RICHARDS (C5C)………….12.2 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.16 DEPARTURE…..+0.01 TOTAL PRECIPITATION FOR THE MONTH…………..0.16 DEPARTURE…..-0.29 TOTAL PRECIPITATION FOR THE YEAR (2025)…….42.47 DEPARTURE…..-2.14 SNOWFALL (INCHES) THROUGH THIS MORNING (EST): TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……0.1 TOTAL SNOWFALL FOR THE MONTH………………..0.0 DEPARTURE…..-0.1 TOTAL SNOWFALL FOR THE SEASON (2025-2026)…….0.0 DEPARTURE…..-0.8 ————————————————————– 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/…/..        50 W   VEC1 50 W   RMY 50 11/2  53/33/43/-4/0.00/0.0/…/..        23 WNW VEC1 23 WNW RMY 24 11/3  54/42/48+2/0.16/0.0/…/..         41 WNW VEC1 41 W   RMY 46 11/4 The low since midnight is 42F, the daily normal low is 37F. ————————————————————– 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 4 HIGH 77 IN 1987 LOW 22 IN 1891 PRECIP 3.27 INCHES IN 1910 SNOWFALL 6.4 IN 1945 PEAK GUST 73 WNW IN 1965 RECORDS FOR NOVEMBER 5 HIGH 76 IN 1994 LOW 18 IN 1908 PRECIP 4.26 INCHES IN 1955 SNOWFALL 2.0 IN 1894 PEAK GUST 69 W IN 2004 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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