Sign In Become a Member
Donate
Daily Discussions

Sunday, July 12, 2026

July 12, 2026

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SUNDAY, JULY 12, 2026 ALL TIMES ARE…

Agreement required — click “Accept & Continue” below to review and accept the Data Use & Privacy Policy

Access to this content requires acceptance of our Data Use & Privacy Policy.

BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

SUNDAY, JULY 12, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0418E
SUNSET:  1921E

A PICTURE PERFECT DAY ON THE HILL WITH SEASONAL TEMPS
AND EASTERLY WINDS…

Daybreak started with scattered mid level clouds and hazy
conditions. There was some brief clearing by mid morning
before fair weather cumulus began to increase. Overall though
it’s been a great day with dry air and brilliant sunshine.

This morning, temperatures dipped down to 61F and just after
sunrise there was a bit of crispness to the air. It was a quite
refreshing feeling, considering the sticky conditions we have
had during the past week. With all day sunshine, temperatures
steadily rose to seasonable ranges again, with our high so far
at 81F. Dew points were highest during the early morning, in the
low 60’s and have improved to the low 50’s by the afternoon.

Winds were out of the west-southwest during the overnight hours
and then shifted to the north-northeast during the daylight time.
By the afternoon we have had more onshore flow, with winds out of
the east and east-northeast. Winds are once again on the light
side today, with an average speed for the day so far around 9mph.
The peak gust so far for the day is 18mph, which occurred at 8:51am
this morning.

Visibility has slightly improved as the day has progressed. We had
around 40 miles and then improved to around 50 miles by mid morning
which held steady through the early afternoon.

The maximum temperature so far today is 81F, which is 1 degree
below the normal high of 82F. The minimum temperature since
midnight is 61F, which is 3 degrees below the normal low of 64F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Scattered altocumulus
Temperature: 69F; Dew Point: 60F; Relative Humidity: 72%
Wind: NE @ 9 kts
Sea-level pressure: 1021.9 mb; 30.18 in. Hg: rising, then more slowly
Visibility: 40 miles, hazy
6-hr Max temp: 69F
6-hr Min temp: 61F
24-hr Precip: 0.00 inches
BHO SA 1155 65 SCT 40 219/69/60/0409/018/ HAZY/ 8/050 51017 10069 20061

10 A.M.
Weather: Clear, few cumulus S-W-NNW
Temperature: 77F; Dew Point: 59F; Relative Humidity: 53%
Wind: ENE @ 9 kts
Sea-level pressure: 1022.8 mb; 30.20 in. Hg: rising, then more slowly
Visibility: 50 miles
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 50 228/77/59/0709/020/ FEW CU S-W-NNW/ 8/100 51009

1 P.M.
Weather: Scattered cumulus
Temperature: 81F; Dew Point: 54F; Relative Humidity: 39%
Wind: E @ 6 kts, wind light
Sea-level pressure: 1022.7 mb; 30.20 in. Hg: rising, then falling
Visibility: 50 miles, smoke plume SE
6-hr Max temp: 81F
6-hr Min temp: 69F
6-hr Precip: 0.00 inches
BHO SA 1755 50 SCT 50 227/81/54/0906/020/ K PLUME SE WND LGT/
8/200 58001 10081 20069
————————————————————–

SUMMARY FOR SATURDAY, JULY 11, 2026

TEMPERATURE (DEGREES F)
MAX…….82   NORMAL…..82
MIN…….66   NORMAL…..64
MEAN……74   NORMAL…..73

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+1
TOTAL DEPARTURE FOR THE MONTH………………………+55 [+4.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2026 THRU JUN 2027)
TOTAL HEATING UNITS FOR YESTERDAY……………..0  DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH (JUL)………..2  DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE SEASON…………….2  DEPARTURE……..-1
TOTAL HEATING UNITS LAST SEASON TO DATE………..1  DEPARTURE……..+1

COOLING DEGREE DAYS (SEASON: JAN 2026 THRU DEC 2026)
TOTAL COOLING UNITS FOR YESTERDAY……………..9  DEPARTURE……..+1
TOTAL COOLING UNITS FOR THE MONTH (JUL)………135  DEPARTURE…….+54
TOTAL COOLING UNITS FOR THE SEASON…………..374  DEPARTURE……+154
TOTAL COOLING UNITS LAST SEASON TO DATE………304  DEPARTURE…….+70

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)………..20 E    @   08:30 A.M.
VECTOR #1 (1-Sec)……….19 E    @   08:30 A.M.
VECTOR #2 (1-Sec)……….19 E    @   08:37 A.M.
DAVIS #1……………….19 E    @   08:30 A.M.
DAVIS #2 ………………17 E    @   08:33 A.M.
RMY #1 (Instantaneous)…..19 E    @   08:30 A.M.
RMY #2 (Instantaneous)…..18 E    @   08:33 A.M.
MERLIN…………………18 E
RICHARDS (C5C) (Inst)……18 E    @   08:30 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………14 E    @   08:36 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..13 E    @   08:36 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..14 E    @   08:36 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………15 E    @   08:36 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………14 S    @   09:20 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..14 E    @   08:36 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..14 E    @   08:36 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………14 E    @   08:36 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………6.9 ENE [166 total miles] VECTOR #1……………….7.5
VECTOR #2……………….7.8
DAVIS #1………………..7.5 ENE
DAVIS #2………………..7.6 E
RMY #1………………….7.5 ENE
RMY #2………………….7.8 ENE
RICHARDS (C5C)…………..7.9

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.11
TOTAL PRECIPITATION FOR THE MONTH (JUL)……..2.22 DEPARTURE…..+1.01
TOTAL PRECIPITATION FOR THE YEAR (2026)…….20.88 DEPARTURE…..-7.56

————————————————————–

PRELIMINARY CLIMATE SUMMARY FOR JULY 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

7/1  95/68/82/+11/0.00/…/..            23 WSW VEC1 23 SW  RMY 24
7/2  99/72/86/+15/0.04/…/..            40 W   VEC1 39 W   RMY 45 TSTM
7/3  98/77/88/+16/0.00/…/..            32 WNW VEC1 32 WNW RMY 34 TSTM
7/4  94/73/84/+12/0.01/…/..            29 WNW VEC1 29 WNW RMY 29
7/5  83/69/76/+4/T/…/..                20 SSE VEC1 20 SE  RMY 17
7/6  74/60/67/-5/0.05/…/..             24 E   VEC1 24 E   RMY 24
7/7  65/61/63/-9/2.11/…/..             40 ENE VEC1 39 NE  RMY 40
7/8  83/58/72/-1/0.01/…/..             26 N   VEC1 26 N   RMY 25
7/9  91/65/78/+5/0.00/…/..             29 SW  VEC1 27 SW  RMY 29
7/10 88/69/79/+6/0.00/…/..             21 NE  VEC1 21 NE  RMY 23
7/11 82/66/74/+1/0.00/…/..             20 E   VEC1 20 E   RMY 19

7/12 The low since midnight is 61F, the daily normal low is 64F.

————————————————————–

JULY DAILY RECORDS TO DATE

7/2 RECORD HIGH MAXIMUM TEMPERATURE OF 99F,
BEATING THE PREVIOUS RECORD OF 95F SET IN 1963

7/2 RECORD HIGH MINIMUM TEMPERATURE OF 72F,
THIS TIED THE RECORD WITH 1901, 1913, AND 1963

7/3 RECORD HIGH MINIMUM TEMPERATURE OF 77F,
BEATING THE PREVIOUS RECORD OF 76F SET IN 2002

————————————————————–

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)

RECORDS FOR JULY 12
HIGH 96F IN 1908
LOW 48F IN 1945
PRECIP 1.43 INS IN 1975
WIND 48e MPH SSW IN 1944

RECORDS FOR JULY 13
HIGH 95F IN 1894
LOW 52F IN 1888, 1939, 1973
PRECIP 3.54 INS IN 1996
WIND 55 MPH SE IN 1996

TODAY’S REPORT PREPARED BY: Amanda Joly

Please follow and like us:
error
fb-share-icon
Tweet
fb-share-icon
←
→
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
↓ Scroll to read the full Policy — the agreement checkbox will unlock at the bottom