Celebrate Earth Day 2025 by immersing yourself in the natural setting of Great Blue Hill while climbing to the Observatory with family, friends, or co-workers. Once you reach the top, climbers will tap a LED counter joining a tally of total climbers. Next our volunteers will capture what “Earth Day Means to You,” which we… Read More »
Blue Hill Observatory March 2025 Summary: March was much warmer than normal, with average precipitation and record low snowfall. The approximated 24-hour mean temperature for the month of 40.2 deg F was 5.7 degrees warmer than the 1891-2020 130-year average for March, and it was 4.4 degrees warmer than the 1991-2020 30-year average. The month… Read More »
Blue Hill Observatory Winter (December-February) 2024-2025 Summary: Winter 2024-2025 was cool with average precipitation, much less snowfall, and much more sunshine than expected. The approximated 24-hour mean temperature for the season of 28.8 deg F was 1.3 degrees warmer than the 1891-2020 130-year average for winter, and it was 0.9 degrees cooler than the 1991-2020… Read More »
Blue Hill Observatory February 2025 Summary: February temperature and sunshine were near average, and there was less rain and snow than expected. The approximated 24-hour mean temperature for the month of 28.0 deg F was 1.4 degrees warmer than the 1891-2020 130-year average for February, and it was 1.2 degrees colder than the 1991-2020 30-year… Read More »
Listed below are recent publications, informal reports and presentations describing climate research on various topics based on the Blue Hill climate record. Click on the title to access each document. 2025 “Historical Trends in Skewness and Extremes of Temperature, Moisture, Sunshine, and Wind Speed Since 1885 at the Blue Hill Observatory” (American Geophysical Union 2025… Read More »
Observatory Research Projects and Collaborations Ongoing research projects and collaborations at BHO cover a wide range of topics related to our long-term climate record, and these activities are supported by staff and professional scientists as well as high-school and college student interns and other volunteers. Listed below is a sample of current projects. Wind Speed… Read More »
This report is an updated summary of the extensive climate records of the Blue Hill Observatory that focuses on the daily climate data for several key parameters over the entire period of record. This document is also available as a downloadable PDF file.
Blue Hill Observatory January 2025 Summary: January temperature was cooler than average with less rain and snow and much more sunshine than expected. The approximated 24-hour mean temperature for the month of 25.5 deg F was 0.4 degrees cooler than the 1891-2020 130-year average for January, and it was 1.7 degrees cooler than the 1991-2020… Read More »
How We Serve the Community
Learn more about the Observatory's observations through graphics, text summaries and data.
BHO sponsors conferences, events and special activities to engage the community about science.
BHO provides many science programs for educators, students and the general public.
Visit the Observatory on Great Blue Hill to learn about climate and weather or tour our historic facility.
Members receive receive free tours, gift shop discounts, program admission, and help support our important mission.
1 Observatory Service Road, Milton, MA 02186
