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Saturday, August 30, 2025

August 30, 2025

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SATURDAY, AUGUST 30, 2025 ALL TIMES ARE…

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BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SATURDAY, AUGUST 30, 2025 ALL TIMES ARE IN EASTERN STANDARD TIME (EST) SUNRISE: 0508E SUNSET:  1821E MIX OF SUN AND CLOUDS TODAY WITH DRY AIR AND COMFORTABLE TEMPERATURES…. Today has been a pretty spectacular Saturday with plenty of sunshine mixed with some mainly fair weather cumulus clouds. The air has dried out nicely following the cold frontal passage late last evening. A brief rain shower did occurred during the mid to late afternoon yesterday leaving only 0.06″ of rain in the gauge. August is likely to finish with well below normal rainfall as we’ve only had roughly half what is normally expected for the month. The monthly deficit as of today is -1.80″! Temperatures today are quite pleasant, especially for late August. Readings, which started the day in the low 50s, have recovered nicely into the low to mid 70s by early this afternoon. This is a bit below normal for this time of year. The dew point has dropped from the low to mid 50s this morning to the upper 40s early this afternoon, indicating a very dry air mass for this time of year. Definitely a great day to be outdoors today! The wind has been fairly steady out of the northwest and west- northwest, but generally on the light side. The average for the day so far is around 9mph. The peak gust for the day so far is 21mph, which occurred just after noon time. Visibility has been excellent today thanks to the nice dry air. The view has been generally 70-80 miles all day! The maximum temperature so far today is 74F degrees, which is 4 degrees below the normal high of 78F. The minimum temperature since midnight is 52 degrees, which is 9 degrees below the normal low of 61F. ————————————————————– Today’s Observations: 7 A.M. Weather: Scattered altocumulus/castellanus Temperature: 57F; Dew Point: 53F; Relative Humidity: 86% Wind: NW @ 7 kts Sea-level pressure: 1015.9 mb; 30.00 in. Hg: rising unsteadily Visibility: 80 miles 6-hr Max temp: 58F 6-hr Min temp: 52F 24-hr Precip: 0.06 inches BHO SA 1155 70 SCT 80 159/57/53/3107/000/ 8/080 52016 70006 10058 20052 10 A.M. Weather: Clear, few cumulus all quadrants, few cirrus distant NW-N and distant ESE-SSW Temperature: 68F; Dew Point: 52F; Relative Humidity: 55% Wind: NW @ 6 kts, wind light Sea-level pressure: 1016.3 mb; 30.01 in. Hg: rising, then falling Visibility: 70 miles 3-hr Precip: 0.00 inches BHO SA 1455 CLR 70 163/68/52/3206/001/ FEW CU ALQDS FEW CI DSNT NW-N AND DSNT ESE-SSW WND LGT/ 8/201 50004 1 P.M. Weather: Broken cumulus, broken cirrus Temperature: 73F Dew Point: 49F; Relative Humidity: 43% Wind: W @ 6 kts, wind light and variable Sea-level pressure: 1016.1 mb; 30.01 in. Hg: falling unsteadily Visibility: 80 miles 6-hr Max temp: 73F 6-hr Min temp: 57F 6-hr Precip: 0.00 inches BHO SA 1755 E45 BKN 250 BKN 80 161/73/49/2606/001/ FEW CB DSNT NE WND L/V/ 8/301 57002 10073 20057 ————————————————————– SUMMARY FOR FRIDAY, AUGUST 29, 2025 TEMPERATURE (DEGREES F) MAX…….73   NORMAL…..78 MIN…….59   NORMAL…..61 MEAN……66   NORMAL…..70 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-4 TOTAL DEPARTURE FOR THE MONTH………………………-49 [-1.9 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026) TOTAL HEATING UNITS FOR YESTERDAY……………..0  DEPARTURE……..-1 TOTAL HEATING UNITS FOR THE MONTH…………….16  DEPARTURE……..+7 TOTAL HEATING UNITS FOR THE SEASON……………17  DEPARTURE………0 TOTAL HEATING UNITS LAST SEASON TO DATE……….11  DEPARTURE……..+6 COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025) TOTAL COOLING UNITS FOR YESTERDAY……………..1  DEPARTURE……..-4 TOTAL COOLING UNITS FOR THE MONTH……………162  DEPARTURE…….-37 TOTAL COOLING UNITS FOR THE SEASON…………..673  DEPARTURE…….+87 TOTAL COOLING UNITS LAST SEASON TO DATE………689  DEPARTURE…….-16 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 F420C (Official)………..29 SSE  @   10:04 A.M. VECTOR #1 (1-Sec)……….29 SSE  @   10:04 A.M. VECTOR #2 (1-Sec)……….29 SSE  @   10:02 A.M. DAVIS #1……………….28 S    @   09:22 A.M. DAVIS #2 ………………35 S    @   09:06 A.M. RMY #1 (Instantaneous)…..29 S    @   09:05 A.M. RMY #2 (Instantaneous)…..29 SSE  @   10:04 A.M. MERLIN…………………25 S RICHARDS (C5C) (Inst)……27      @   09:05 A.M. FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL………………20 SSE  @   10:06 A.M. MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..20      @   10:05 A.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..22      @   10:04 A.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………19 SSE  @   10:05 A.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………24 S    @   09:09 A.M. MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..19 SSE  @   10:07 A.M. MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..22 SSE  @   10:04 A.M. MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………20      @   10:07 A.M. AVERAGE WIND SPEED AND DIRECTION: CONTACTING/OFFICIAL……..10.5 S [251 total miles] VECTOR #1………………10.7 VECTOR #2………………11.5 DAVIS #1……………….10.3 S DAVIS #2……………….11.8 S RMY #1…………………10.4 SSW RMY #2…………………11.6 S RICHARDS (C5C)………….10.6 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.06 DEPARTURE…..-0.06 TOTAL PRECIPITATION FOR THE MONTH…………..1.88 DEPARTURE…..-1.80 TOTAL PRECIPITATION FOR THE YEAR (2025)…….31.33 DEPARTURE…..-3.05 ————————————————————– PRELIMINARY CLIMATE SUMMARY FOR AUGUST CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/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 8/1   71/57/64/-9/0.44/546/63            28 NE  VEC1 28 NE  RMY 27 8/2   75/54/65/-8/0.00/838/97            18 NNW VEC1 18 NNW RMY 18 8/3   83/59/71/-2/0.00/784/91            21 SSW VEC1 21 SSW RMY 21 8/4   84/61/73/0/0.00/757/88             17 W   VEC1 17 W   RMY 17 8/5   73/62/68/-5/0.00/480/56            28 NE  VEC1 27 NE  RMY 28 8/6   77/61/69/-4/0.00/248/29            17 ENE VEC1 17 ENE RMY 16 8/7   81/61/71/-2/0.00/665/78            18 ESE VEC1 18 ESE RMY 17 8/8   83/61/72/0/0.00/834/98             21 SSW VEC1 21 SSW RMY 21 8/9   83/60/72/0/0.00/814/96             22 S   VEC1 22 SSW RMY 22 8/10  89/61/75/+3/0.00/761/90            22 S   VEC1 22 S   RMY 21 8/11  94/67/81/+9/0.00/792/94            20 W   VEC1 19 W   RMY 19 8/12  93/68/81/+9/0.00/806/96            21 SSW VEC1 21 SSW RMY 21 8/13  88/66/77/+5/0.00/344/41            25 SW  VEC1 25 SW  RMY 25 8/14  90/68/79/+7/0.68/426/51            35 NE  VEC1 34 NE  RMY 36 TSTM 8/15  75/63/69/-3/0.00/783/96            29 NE  VEC1 29 ENE RMY 31 8/16  86/62/74/+2/0.00/730/88            23 S   VEC1 24 S   RMY 23 8/17  89/64/77/+5/0.19/414/50            41 NE  VEC1 43 NE  RMY 42 TSTM 8/18  68/55/62/-9/0.00/627/76            32 NE  VEC1 34 NE  RMY 34 8/19  73/54/64/-7/0.00/560/68            20 SE  VEC1 19 SE  RMY 18 8/20  63/51/57-14/0.51/008/01            22 ENE VEC1 22 ENE RMY 21 8/21  67/54/61/-10/T/303/37              36 ENE VEC1 35 NE  RMY 36 8/22  79/53/66/-5/0.00/774/95            24 N   VEC1 25 N   RMY 25 8/23  85/60/73/+2/0.00/771/95            33 SSW VEC1 33 SSW RMY 35 8/24  80/60/70/-1/0.00/632/78            33 SSW VEC1 35 SSW RMY 34 8/25  83/63/73/+3/T/533/66               23 WSW VEC1 22 SW  RMY 23 8/26  77/59/68/-2/0.00/765/95            28 WNW VEC1 27 WNW RMY 28 8/27  75/57/66/-4/T/634/79               26 WNW VEC1 26 NW  RMY 27 8/28  77/52/65/-5/T/…/..               31 SSW VEC1 31 SSW RMY 31 8/29  73/59/66/-4/0.06/…/..            29 SSE VEC1 29 SSE RMY 29 8/30 The low since midnight is 52F, the daily normal low is 61F. ————————————————————– AUGUST DAILY RECORDS TO DATE NONE. ————————————————————– DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR AUGUST 30 HIGH 94F IN 1953 LOW 39F IN 1965 PRECIP 2.75 INCHES IN 1936 PEAK GUST 43 MPH NW IN 1965 RECORDS FOR AUGUST 31 HIGH 94F IN 1953 LOW 42F IN 1976 PRECIP 2.46 INCHES IN 1954 PEAK GUST 125 MPH SE IN 1954 [CAROL – RECORD FOR MONTH] TODAY’S REPORT PREPARED BY: MFD
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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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