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Sunday, February 1, 2026

February 1, 2026

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SUNDAY, FEBRUARY 1, 2026 ALL TIMES ARE…

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BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SUNDAY, FEBRUARY 1, 2026 ALL TIMES ARE IN EASTERN STANDARD TIME (EST) SUNRISE: 0658E SUNSET:  1658E ARCTIC COLD CONTINUES WITH A TOUCH OF LIGHT SNOW THIS MORNING…. Today, February 1st, marks the 141 year anniversary of the first observation taken here at Blue Hill Observatory. We continue to maintain this unbroken continuous record using much of the same manual methods and instrumentation throughout the entire period. A rapidly deepening ocean storm well to our southeast early this afternoon helped to trigger some ocean effect light snow overnight and into early this morning. 0.1″ of snow was measured early this morning. Thankfully the bulk of the storm is remaining offshore. Nonetheless, skies are mainly cloudy with a very cold northerly wind being the theme for the balance of the day. Temperatures continue to be well below normal with reading this morning in the single digits (yet again), only rising to the upper teens by early this afternoon. Wind chill values have been consistently near or below zero today, with the lowest value around -16F early this morning. Despite the snow early this morning, dew point readings have remained in the single digits all day, very much indicative of the arctic air mass holding its ground across the region. Winds have been busy today, mainly out of the north. The average speed for the day so far is around 15mph. Gusts have been frequently exceeding 25mph, with the peak gust for the day so far being 36mph, which occurred right around 10:45am this morning. Visibility has improved as the day progressed, starting from around 40 miles this morning (except as low as 6 miles to the east through southeast this morning with the snow) to around 60 miles early this afternoon. The maximum temperature so far today is 19F degrees, which is 16 degrees below the normal high of 35F. The minimum temperature since midnight is 5F degrees, which is 12 degrees below the normal low of 17F. ————————————————————– PRELIMINARY STATS FOR JANUARY 2026 TEMPERATURE, Deg. F Avg. Max. 32.7 [-2.0] Avg. Min. 17.4 [-0.9] Mean      25.1 [-1.4] 24-hour corrected mean: 24.6 Max. for month: 51F on the 15th Min. for month: -1F on the 31st HEATING DEGREE DAYS Total heating units:   1233 [+040] Total for the season:  3473 [+070] Total for last season: 3143 COOLING DEGREE DAYS Total cooling units:      0 [ 000] Total for the season:     0 [ 000] Total for last season:    0 PRECIPITATION, Inches Total: 3.62 [-0.88] Greatest in 24 hrs: 1.85 on the 25th-26th SNOWFALL, Inches Total: 35.9 [+17.3] Greatest in 24 hrs: 22.2 on the 25th-26th WIND, mph Avg. uncorrected wind speed: 12.1 mph Avg. corrected wind speed:   12.5 mph Prevailing wind direction:   West-Northwest [23%] Peak gust and direction:     53 E on the 25th SUNSHINE: Campbell-Stokes card minutes: 8712 of a possible 17130, or 51% Astronomical total minutes: 9000 of a possible 17686 or 51% ————————————————————– Today’s Observations: 7 A.M. Weather: Broken stratocumulus, overcast cirrostratus, few breaks in overcast distant W-NW, virga NE-S Temperature: 5F; Dew Point: 0F; Relative Humidity: 79% Wind: N @ 15G24 kts, peak wind N 30mph at 6:10 A.M. Sea-level pressure: 1011.0 mb; 29.86 in. Hg: falling, then more slowly Visibility: 40 miles, 12 miles NE-E, 6 miles ESE-SE, 15 miles S 6-hr Max temp: 11F 6-hr Min temp:  5F 24-hr Precip: Trace 24-hr Snowfall: 0.1 inches Snow Depth: 17 inches BHO SA 1155 E10 BKN 220 OVC 40 110/5/0/3515G24/986/ FEW BINOVC DSNT W-NW VIRGA NE-S S-E50 VSBY 12 NE-E 6 ESE-SE 15 S PK WND 3526/10/ TOTAL NEW SNW PST 24 HRS 0.1 INS/ 8/507 4/017 56017 6000/ 70000 10011 20005 10 A.M. Weather: Scattered stratocumulus, broken cirrostratus, broken cirrus, virga distant NE-S Temperature: 10F; Dew Point: 2F; Relative Humidity: 72% Wind: N @ 16G26 kts, peak wind 32mph at 9:18 A.M. Sea-level pressure: 1009.4 mb; 29.81 in. Hg: falling, then more rapidly Visibility: 60 miles, 15 miles NE-SE, 30 miles S 3-hr Precip: Trace 3-hr Snowfall: Trace BHO SA 1455 20 SCT E220 BKN 250 BKN 60 094/10/2/3516G26/981/ VIRGA DSNT NE-S VSBY 15 NE-SE 30 S PK WND 3528/18/ TOTAL NEW SNW PST 3 HRS TRACE/ 8/506 58016 6000/ 1 P.M. Weather: Broken cirrostratus, broken cirrus, few stratocumulus distant NE-SSW Temperature: 19F; Dew Point: 5F; Relative Humidity: 54% Wind: N @ 12G21 kts Sea-level pressure: 1006.5 mb; 29.72 in. Hg: falling, then more rapidly Visibility: 60 miles 6-hr Max temp: 19F 6-hr Min temp:  5F 6-hr Precip: Trace 6-hr Snowfall: Trace Snow Depth: 17 inches BHO SA 1755 E220 BKN 250 BKN 60 065/19/5/3512G21/972/ FEW SC DSNT NE-SSW TOTAL NEW SNW PST 6 HRS TRACE/ 8/506 4/017 58029 6000/ 10019 20005 ————————————————————– SUMMARY FOR SATURDAY, JANUARY 31, 2026 TEMPERATURE (DEGREES F) MAX…….22   NORMAL…..35 MIN…….-1   NORMAL…..17 MEAN……11   NORMAL…..26 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………-15 TOTAL DEPARTURE FOR THE MONTH………………………-43 [-1.6 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026) TOTAL HEATING UNITS FOR YESTERDAY…………….54  DEPARTURE…….+15 TOTAL HEATING UNITS FOR THE MONTH…………..1233  DEPARTURE…….+40 TOTAL HEATING UNITS FOR THE SEASON………….3473  DEPARTURE…….+70 TOTAL HEATING UNITS LAST SEASON TO DATE……..3143  DEPARTURE……+330 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)………..24 N    @   10:58 P.M. VECTOR #1 (1-Sec)……….24 N    @   10:58 P.M. VECTOR #2 (1-Sec)……….26 NNW  @   10:55 P.M. DAVIS #1……………….24 N    @   10:58 P.M. DAVIS #2 ………………24 NNE  @   10:57 P.M. RMY #1 (Instantaneous)…..27 N    @   10:58 P.M. RMY #2 (Instantaneous)…..25 NNW  @   10:55 P.M. MERLIN………………….M RICHARDS (C5C) (Inst)……25 N    @   10:58 P.M. FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL………………16 N    @   10:59 P.M. MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..18 N    @   10:59 P.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..18 NNW  @   10:59 P.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………18 N    @   10:59 P.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………18 N    @   10:59 P.M. MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..17 N    @   10:59 P.M. MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..18 NNW  @   10:59 P.M. MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………17 N    @   10:59 P.M. AVERAGE WIND SPEED AND DIRECTION: CONTACTING/OFFICIAL………8.1 WNW [194 total miles] VECTOR #1……………….8.5 VECTOR #2……………….9.2 DAVIS #1………………..8.7 NNW DAVIS #2………………..8.8 NNW RMY #1………………….8.4 NNW RMY #2………………….9.0 WNW RICHARDS (C5C)…………..8.9 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….TRACE DEPARTURE…..-0.14 TOTAL PRECIPITATION FOR THE MONTH (JAN)……..3.62 DEPARTURE…..-0.88 TOTAL PRECIPITATION FOR THE YEAR (2026)……..3.62 DEPARTURE…..-0.88 SNOWFALL (INCHES) THROUGH THIS MORNING (EST): TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.1 DEPARTURE…..-0.6 TOTAL SNOWFALL FOR THE MONTH (JAN)………….35.9 DEPARTURE….+17.3 TOTAL SNOWFALL FOR THE SEASON (2025-2026)……42.9 DEPARTURE…..+9.2 ————————————————————– PRELIMINARY CLIMATE SUMMARY FOR JANUARY 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 1/1  29/11/20/-9/0.15/2.7/264/48         43 NW  VEC1 43 NW  RMY 42 1/2  25/12/19/-9/0.00/0.0/397/72         26 W   VEC1 26 W   RMY 27 1/3  30/14/22/-6/0.00/0.0/342/62         31 WNW VEC1 31 WNW RMY 31 1/4  30/21/26/-2/0.03/0.4/171/31         26 NNW VEC1 27 NNW RMY 28 1/5  25/11/18/-10/0.04/0.2/249/45        23 SSE VEC1 22 NW  RMY 23 1/6  32/22/27/-1/0.01/T/000/00           22 ENE VEC1 21 E   RMY 23 1/7  36/30/33/+6/0.25/0.1/000/00         23 NW  VEC1 21 ENE RMY 24 1/8  45/30/38/+11/0.00/0.0/500/90        26 NW  VEC1 27 WNW RMY 27 1/9  50/32/41/+14/0.06/0.0/228/41        41 SW  VEC1 42 SSW RMY 44 1/10 50/36/43/+16/0.36/T/022/04          33 W   VEC1 31 W   RMY 31 1/11 41/30/36/+9/0.06/0.0/079/14         43 WNW VEC1 41 WNW RMY 43 1/12 37/24/31/+4/0.00/0.0/303/54         47 WNW VEC1 46 WNW RMY 47 1/13 45/28/37/+11/0.00/0.0/457/81        35 SSW VEC1 35 SSW RMY 33 1/14 49/39/44/+18/T/0.0/017/03           36 SSW VEC1 36 SSW RMY 36 1/15 51/25/38/+12/T/0.0/340/60           39 SW  VEC1 39 SW  RMY 38 1/16 30/15/23/-3/0.00/0.0/483/85         46 W   VEC1 46 W   RMY 46 1/17 38/24/31/+5/0.02/T/040/07           39 SSW VEC1 39 SSW RMY 40 1/18 33/28/31/+5/0.44/4.4/000/00         22 S   VEC1 22 S   RMY 21 1/19 34/22/28/+2/0.11/2.2/132/23         35 WSW VEC1 33 WSW RMY 38 1/20 24/11/18/-8/0.00/0.0/564/98         33 W   VEC1 33 W   RMY 34 1/21 33/7/20/-6/0.01/0.1/387/67          33 SSW VEC1 34 SSW RMY 36 1/22 43/27/35/+9/0.02/0.2/348/60         38 W   VEC1 38 W   RMY 42 1/23 32/10/21/-5/0.00/0.0/552/95         46 WNW VEC1 46 WNW RMY 47 1/24 13/0/7/-19/0.00/0.0/554/95          48 NW  VEC1 49 WNW RMY 52 1/25 26/3/15/-11/1.65/19.4/000/00        53 E   VEC1 51 E   RMY 57 1/26 27/11/19/-7/0.41/5.9/000/00         43 ENE VEC1 42 ENE RMY 45 1/27 22/4/13/-13/T/0.3/354/60            40 NW  VEC1 40 NW  RMY 37 1/28 23/5/14/-12/0.00/0.0/486/82         25 WNW VEC1 25 WNW RMY 24 1/29 24/5/15/-11/0.00/0.0/565/95         29 WNW VEC1 29 WNW RMY 30 1/30 14/2/8/-18/0.00/0.0/591/99          35 WNW VEC1 35 NW  RMY 39 1/31 22/-1/11/-15/0.00/0.0/575/96        24 N   VEC1 24 N   RMY 27 2/1 The low since midnight is 5F, the daily normal low is 17F. ————————————————————– JANUARY DAILY RECORDS TO DATE 1/25/26: DAILY RECORD SNOWFALL OF 19.4 INS, SURPASSES THE PREVIOUS RECORD OF 12.5 IN IN 1941 ————————————————————– DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR FEBRUARY 1 HIGH 65F IN 1989 LOW -9F IN 1920 PRECIP 1.86 INS. IN 2021 SNOWFALL 12.7 INS. IN 2021 PEAK GUST 66e MPH SSW IN 1951 RECORDS FOR FEBRUARY 2 HIGH 55F IN 1951, 1973 LOW -12F IN 1961 PRECIP 1.91 INS. IN 1999 SNOWFALL 16.5 INS. IN 2015 PEAK GUST 92 MPH SW IN 1970 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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