Blue Hill Observatory April 2026 Summary: April 2026 was generally warm with below average precipitation and snowfall and near average sunshine. The…
Blue Hill Observatory March 2026 Summary: March 2026 was generally warm with average precipitation, very little snow, and below average sunshine. The…
Blue Hill Observatory Winter (Dec-Feb) 2025-2026 Summary: Winter 2025-2026 was much colder and snowier than average with less total precipitation and more…
Blue Hill Observatory February 2026 Summary: February 2026 was generally cold with much more snowfall than normal and average sunshine. The approximated…
Blue Hill Observatory January 2026 Summary: January 2026 was generally cold with much more snowfall and more sunshine than average. The approximated…
The year 2025 was warmer than average, but it was the coolest year since 2019. The approximated 24-hour mean temperature of 49.9F…
Blue Hill Observatory December 2025 Summary: December 2025 was colder and drier than normal with less snowfall and much more sunshine than…
Blue Hill Observatory Fall (Sep-Nov) 2025 Summary: Fall 2025 temperature was above average, precipitation was near average, and there was more sunshine…
Blue Hill Observatory November 2025 Summary: November 2025 was cooler than normal with less precipitation and more sunshine than average. The approximated…
Monthly Skymail, event announcements, and research summaries.
Please read the full Policy before accessing Observatory data · Effective January 1, 2025
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.
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.
Observatory data are made available for the following limited, non-commercial purposes only:
All other uses require prior written authorization from the Observatory.
Any use of Observatory data in any published, presented, or publicly distributed work must include the following verbatim acknowledgment:
Failure to include proper attribution is a material violation of this Policy.
Unless explicitly authorized in writing, Users may not:
Organizations seeking to use Observatory data for commercial purposes must obtain a license prior to any such use. Licensing inquiries: data@bluehill.org.
Automated scraping, bulk harvesting, or systematic downloading of Observatory data is strictly prohibited without prior written authorization.
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.
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.
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.
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.
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.
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
