Observed arrival · 2026-09-19
Blue Hill Observatory, Keeping Watch Since 1885
A historic Massachusetts observatory and science center documenting weather, climate, education, research, and life on Great Blue Hill.
- For
- Weather historians, educators, visitors, and climate researchers
- Worth noticing
- The observatory reports 51,729 unbroken days of weather observations since February 1, 1885.
Field notes
Blue Hill Observatory combines public-facing science with an unusually long operational record: the site dates its observations to February 1, 1885, and reports 51,729 consecutive days without a missed entry. Its navigation exposes both research material—climate graphs, weather archives, webcams, and specialist resources—and practical programming such as field trips, classroom visits, tours, and public lectures. The homepage also records a temporary closure connected to vandalism and outlines an active appeal for support.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
One card from the complete issue