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Earth Day · April 22, 2026

Earth Day for a Better Tomorrow

For 141 years, the Blue Hill Observatory has never missed a day of climate observation. Today, your support ensures the next generation can learn from real data, real science, and real experience.

51,588 Unbroken Days
141 Years of Data
2,500+ Youth/Year
How We Serve the Community

Science, Education & Discovery

"The most homogeneous climate record in North America."  —  World Meteorological Organization

From the Observatory

Latest News & Research

  • Apr 22, 2026 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.

  • Apr 22, 2026 Climb for a Better Tomorrow: Thank You for Making It Unforgettable

    With full hearts, we extend our deepest thanks to the participants, sponsors, and volunteers who made the fifth annual Climb for a…

  • Mar 24, 2026 Meet Cheryl Cummings, Director of Strategic Partnerships

    Cheryl Cummings has spent more than two decades helping mission-driven organizations grow — building strategies, strengthening teams, and connecting people to causes worth believing in. For the past six years, she has brought that experience to bear at Blue Hill Observatory & Science Center, where she serves as Director of Strategic Partnerships.

  • Mar 24, 2026 Your Legacy at the Observatory

    By including Blue Hill Observatory in your will or estate plan, you help ensure that this extraordinary scientific and historic legacy continues for generations to come — that the climate record keeps growing, that students keep climbing this hill, and that the doors of the Observatory stay open to scientists, educators, and the curious public long into the future.

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Current Conditions

Great Blue Hill Today

May 1 · 5:33 PM EST

Blue Hill Observatory

Temperature 63.1°F
Wind NW 11 mph
Gust 17 mph
Humidity 29%
Pressure 29.751"
View full weather data →
Our Mission

The Last Best Independent Climate Record

As federal science funding erodes, Blue Hill Observatory stands at a crossroads. We hold North America's longest continuous weather record — data that NOAA, NASA, and leading universities rely on. That record doesn't maintain itself.

Trusted By
UNITED NATIONS NOAA NASA NATIONAL PARK SERVICE NATIONAL WEATHER SERVICE WORLD METEOROLOGICAL ORG. AM. METEOROLOGICAL SOCIETY MUSEUM OF SCIENCE