Armagh Observatory marked a significant historic milesotone today - 230 years of daily weather observations, with readings having been taken every single day since 14th July 1795.
To celebrate, the Observatory hosted a special gathering of scientists and members of the public at it’s historic meteorological enclosure (“MET cage”) this morning, followed by a Family Fun Day at the Planetarium.
Meteorological measurements at Armagh actually began in December 1794, but were recorded less frequently. An unbroken sequence of daily weather readings staried in July 1795, making The Observatory’s one of the longest continuous climate records in the British Isles.
“Reaching 230 years of uninterrupted weather records is an extraordinary achievement” said Dr Kerem Osman Çubuk (Astronomy Communicator, AOP).
“This archive is one of the oldest and most consistent climate datasets globally, critical for understanding long-term climate trends, planning our futures, and celebrating centuries of dedicated observations.”
Since 1836, rainfall has also been recorded daily; humidity data (wet bulb) from 1838; and maximum and minimum daily temperatures from 1844.
The Observatory’s instrumentation has evolved over time from primitive thermometers and barometers to a Stevenson Screen (installed in 1865) and a modern Met Office standard automatic weather station which was added in 2018. The Observatory was also officially recognised as a WMO Centennial Observing Station in 2018.
Those attending today’s event were invited to view the historic meteorological instruments and learn about the imprtance of The Observatory’s unique legacy of continuous observation. The celebrations continued with a Family Fun Day at the Planetarium.
Visitors also enjoyed access to Planetarium exhibits, the sensory room and Dome Shows as part of a full day programme of engaging and educational experiences.
Monday 14th July 2025 has highlighted Armagh Observatory’s heritage and extraordinary scientific contribution as well as underscoring it’s vital ongoing mission: to connect people with climate, space, and the wonder of scientific discovery.
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