Sign In Become a Member
Donate
Daily Discussions

Friday, April 10, 2026

April 10, 2026

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

FRIDAY, APRIL 10, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0511E
SUNSET:  1820E

SUNSHINE AND SOUTHWESTERLY FLOW BRING A TASTE OF SPRING
TO BLUE HILL….

Skies have remained mostly clear today with an exception of
a few higher level clouds. The warm air has been nice, with
plenty of people and bird songs to be heard throughout the
day. Spring is indeed- quite literally- in the air today!

Temperatures have recovered quite a bit since the overnight
low of 33F. By mid morning we were nearing 60F which is 6 degrees
above normal. Temperatures warmed to 66F by the final 1pm daily
observation and were still warming. Dew points have also trended
to warming, with a starting dew point of 36F at 7am to 40F by
the early afternoon. It’s still relatively dry air, and so it
hasn’t felt sticky or humid, but this has really made it feel
like a true spring day.

Winds have been steady out of the southwest for much of the day
today, with an average around 13mph so far for the day. The wind
started picking up during the late morning with some gusts in the
20 mph range. The peak gust so far for the day is 29mph which
occurred just after 2am this morning.

Despite the clear conditions, visibility has been on the lower
side, due to morning fog and higher dew points. The visibility
has hovered between 30-40 miles throughout the day.

The maximum temperature so far today is 66F degrees, which is
12 degrees above the normal high of 54F. The minimum temperature
since midnight is 33F degrees, which is 3 degrees below the
normal low of 36F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Clear, few altocumulus W-NNW
Temperature: 40F; Dew Point: 36F; Relative Humidity: 86%
Wind: SW @ 9 kts
Sea-level pressure: 1028.2 mb; 30.36 in. Hg: falling, then more rapidly
Visibility: 30 miles, thin fog NNE-ESE
6-hr Max temp: 40F
6-hr Min temp: 33F
24-hr Precip: 0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 CLR 30 282/40/36/2109/036/ FEW AC W-NNW THN F NNE-ESE/
8/050 58007 10040 20033

10 A.M.
Weather: Clear, few cirrus all quadrants
Temperature: 57F; Dew Point: 39F; Relative Humidity: 50%
Wind: SW @ 10G18 kts
Sea-level pressure: 1026.2 mb; 30.30 in. Hg: falling, then more slowly
Visibility: 40 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 CLR 40 262/57/39/2110G18/030/ FEW CI ALQDS/ 8/001 56020

1 P.M.
Weather: Clear, few cirrus all quadrants
Temperature: 66F; Dew Point: 40F; Relative Humidity: 39%
Wind: SSW @ 13G21 kts
Sea-level pressure: 1023.7 mb; 30.23 in. Hg: falling, then more slowly
Visibility: 40 miles
6-hr Max temp: 66F
6-hr Min temp: 40F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 CLR 40 237/66/40/2013G21/023/ FEW CI ALQDS/ 8/001 56025
10066 20040

————————————————————–

SUMMARY FOR THURSDAY, APRIL 9, 2026

TEMPERATURE (DEGREES F)
MAX…….56   NORMAL…..53
MIN…….30   NORMAL…..35
MEAN……43   NORMAL…..44

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-1
TOTAL DEPARTURE FOR THE MONTH………………………+10 [+0.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY…………….22  DEPARTURE……..+1
TOTAL HEATING UNITS FOR THE MONTH (MAR)………191  DEPARTURE…….-11
TOTAL HEATING UNITS FOR THE SEASON………….5509  DEPARTURE…….-40
TOTAL HEATING UNITS LAST SEASON TO DATE……..5136  DEPARTURE……+373

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)………..35 S    @   04:08 P.M.
VECTOR #1 (1-Sec)……….35 SSW  @   04:15 P.M.
VECTOR #2 (1-Sec)……….35 S    @   04:08 P.M.
DAVIS #1……………….38 S    @   04:04 P.M.
DAVIS #2 ………………43 S    @   04:53 P.M.
RMY #1 (Instantaneous)…..35 SSW  @   04:56 P.M.
RMY #2 (Instantaneous)…..37 S    @   04:08 P.M.
MERLIN…………………32 S
RICHARDS (C5C) (Inst)……33 SSW  @   04:12 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………26 SSW  @   04:06 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..26 SSW  @   04:06 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..26 SSW  @   04:07 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………28 S    @   04:06 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………31 S    @   04:55 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..25 SSW  @   04:06 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..27 SSW  @   04:07 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………25 SSW  @   04:06 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..13.4 SSW [322 total miles] VECTOR #1………………13.6
VECTOR #2………………14.1
DAVIS #1……………….13.3 SSW
DAVIS #2……………….14.7 SSW
RMY #1…………………13.3 SSW
RMY #2…………………14.2 SSW
RICHARDS (C5C)………….13.0

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.18
TOTAL PRECIPITATION FOR THE MONTH (APR)……..0.92 DEPARTURE…..-0.61
TOTAL PRECIPITATION FOR THE YEAR (2026)…….12.59 DEPARTURE…..-2.96

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE…..-0.1
TOTAL SNOWFALL FOR THE MONTH (APR)…………TRACE DEPARTURE…..-1.5
TOTAL SNOWFALL FOR THE SEASON (2025-2026)……81.6 DEPARTURE….+13.2

————————————————————–

PRELIMINARY CLIMATE SUMMARY FOR APRIL 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

4/1  73/38/56/+15/0.16/0.0/061/08        35 NE  VEC1 34 ENE RMY 35
4/2  38/34/36/-5/0.45/0.0/000/00         31 E   VEC1 31 E   RMY 33
4/3  67/35/51/+9/0.04/0.0/270/35         31 SW  VEC1 31 SW  RMY 35
4/4  58/35/47/+5/0.01/0.0/093/12         39 ENE VEC1 38 ENE RMY 42
4/5  55/36/46/+3/0.16/0.0/008/01         35 NW  VEC1 36 NW  RMY 38
4/6  50/32/41/-2/0.00/0.0/708/91         46 WNW VEC1 46 WNW RMY 47
4/7  50/29/40/-4/0.10/T/336/43           39 WNW VEC1 39 WNW RMY 41
4/8  43/25/34/-10/0.00/0.0/756/96        30 NNW VEC1 31 NNW RMY 32
4/9  56/30/43/-1/0.00/0.0/…/..         35 S   VEC1 35 SSW RMY 35

4/10 The low since midnight is 33F, the daily normal low is 36F.

————————————————————–

APRIL DAILY RECORDS TO DATE

NONE.

————————————————————–

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

RECORDS FOR APRIL 10
HIGH 83 IN 1922
LOW 20 IN 1985
PRECIP 2.40 IN. IN 1935
SNOWFALL 10.1 IN. IN 1996
PEAK GUST 66 MPH WNW IN 1967

RECORDS FOR APRIL 11
HIGH 85 IN 2017
LOW 19 IN 1909
PRECIP 1.72 IN. IN 2003
SNOWFALL 9.5 IN. IN 1958
PEAK GUST 65 MPH NW IN 1963

TODAY’S REPORT PREPARED BY: Amanda Joly

facebookShare on Facebook
TwitterPost on X
FollowFollow us
PinterestSave
←
→
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
Main Menu