August 14 Pitch for Impact Event

Join us at the Blue Hill Observatory to connect with fellow changemakers and educators to address some of the most challenging issues facing STEM and environmental education right now. A local organization will pose a problem and participants will break out into teams to try and come up with the most creative, game-changing solutions, from… Read More »

June 2025 Summary – Eighth Warmest on Record

Blue Hill Observatory June 2025 Summary:  June temperature was well above average with much below normal rainfall and average sunshine. The approximated 24-hour mean temperature for the month of 68.1 deg F was 3.8 degrees warmer than the 1891-2020 130-year average for June, and it was 2.4 degrees warmer than the 1991-2020 30-year average. The… Read More »

Observatory Reaches 99F on Third Day of Heatwave

After reaching a high temperature of 91F on June 22nd and 94F on June 23rd, 2025, the heatwave reached its third day on Tuesday, June 24th when the temperature soared to a high of 99F at the Observatory on the summit of Great Blue Hill. This reading not only surpassed the record for the date… Read More »

Spring 2025 Summary – Tied for Fourth Warmest on Record

Blue Hill Observatory Spring (Mar-May) 2025 Summary:  Spring 2025 temperature and precipitation were well above average with much less snowfall and less sunshine than expected. The approximated 24-hour mean temperature for spring of 49.0 deg F was 4.1 degrees warmer than the 1891-2020 130-year average for the season, and it was 2.6 degrees warmer than… Read More »

May 2025 Summary – Eighth Wettest on Record

Blue Hill Observatory May 2025 Summary: May 2025 was warmer and much wetter than average with much less sunshine than expected. The approximated 24-hour mean temperature for the month of 57.4 deg F was 1.9 degrees warmer than the 1891-2020 130-year average for May, and it was 0.7 degrees warmer than the 1991-2020 30-year average.… Read More »

The Weather on June 17, 1775: The Battle of Bunker Hill

Contributed by Dr. William Minsinger, President Emeritus, BHOSC America’s 250th birthday – its semi-quincentennial – is a good opportunity to take a step back in time to look at the weather on June 17th, 1775, during the pivotal Battle of Bunker Hill. The British in their bloody retreat through Charlestown from Lexington and Concord had… Read More »

April 2025 Summary – Seventh Warmest on Record

  Blue Hill Observatory April 2025 Summary: April 2025 was much warmer than average with below average precipitation and snowfall. The approximated 24-hour mean temperature for the month of 49.3 deg F was 4.4 degrees warmer than the 1891-2020 130-year average for April, and it was 2.6 degrees warmer than the 1991-2020 30-year average. April… Read More »

Join us online April 29th at 11 AM for a NEW webinar: “Winter 2024-2025 Recap” with host Tim Kelley

The Blue Hill Observatory invites all weather enthusiasts to a free webinar titled “Winter 2024-2025 Outlook in New England Recap.” Jeremy Reiner, Chief Meteorologist for 7 News Boston, WHDH-TV, will revisit his winter 2024-2025 outlook predictions with host and fellow meteorologist, Tim Kelley.  All participants will have a chance to join the conversation in this interactive and fun event… Read More »

The Weather on April 19, 1775: The Battle of Lexington and Concord

Contributed by Dr. William Minsinger, President Emeritus, BHOSC America’s 250th birthday – its semi-quincentennial – is a good opportunity to take a step back in time to look at the weather on April 19th, 1775 during the pivotal Battle of Lexington and Concord. British General Thomas Gage in Boston had received intelligence that John Hancock… Read More »