Take Action · 2026 Help Protect the Observatory. Your Voice Matters. We are asking our community to take two simple actions in support of critical funding for Blue Hill Observatory. It takes only minutes — and your message can make a real difference. Ask #1 · State Contact Your MA State Representative Support Amendment #729… Read More »
Earth Day 2026 · Support the Observatory 141 Years of Watching the Sky. Help Us Never Stop. On this Earth Day, we invite you to invest in the climate record that cannot be replaced — and the community that sustains it. A Blue Hill Observatory observer at work on the rooftop instrument deck — part… Read More »
Earth Day 2026 · Blue Hill Observatory & Science Center Climb for a Better Tomorrow: Thank You for Making It Unforgettable April 18, 2026 · Great Blue Hill, Milton, MA With full hearts, we extend our deepest thanks to the participants, sponsors, and volunteers who made the fifth annual Climb for a Better Tomorrow a… Read More »
Significant Weather Weekly Outlook Hazardous weather does not appear likely this week. Cold pool of air associated with an upper trough and radiational cooling enhanced by clear skies and light winds will result in unseasonably cold temperatures tonight dropping into the 20s away from the coast. The rest of the week should see some moderation… Read More »
Updated Significant Weather Weekly Outlook Hazardous weather is not expected this weekend, but a significant change in temperatures lies ahead. Saturday looks to be dry, albeit cooler than most of this past week for most interior areas. Widespread showers are expected Sunday in association with a high amplitude upper trough and strong surface cold front. … Read More »
Significant Weather Weekly Outlook A broad, large subtropical upper-level ridge is bringing warm temperatures to southern New England this week. As one might surmise, temperatures this far above normal cannot be expected to be sustained for a long time in April. A series of troughs will erode the ridge late this week into early next… Read More »
Significant Weather Weekly Outlook No significant hazardous weather is expected across southern New England this week. On the larger scale, an upper level trough across the northeast United States will move out around mid-week. For the second half of this week, an upper-level trough will develop/deepen over the western U.S. as an upper level ridge… Read More »
Blue Hill Observatory March 2026 Summary: March 2026 was generally warm with average precipitation, very little snow, and below average sunshine. The approximated 24-hour mean temperature for the month of 39.4 deg F was 4.9 degrees warmer than the 1891-2020 130-year average for March, and it was 3.6 degrees warmer than the 1991-2020 30-year average.… Read More »
Significant Weather Weekly Outlook Southern New England will lie near the boundary of warm and cool air this coming week. Warm temperatures will likely prevail through mid-week followed by chillier air later in the week into next weekend. That chillier air later in the period will likely be accompanied by raw northeast winds as strong… Read More »
For Immediate Release 9:00 AM, March 26, 2026 Press Contact: Krista Fincke | kfincke@bluehill.org Blue Hill Observatory Renames Annual Earth Day Climb, Expands Invitation to All The beloved climb up Great Blue Hill returns April 18 under a new name — Climb for a Better Tomorrow — with a broader mission and 800+ expected participants… 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
