Armagh Observatory and Planetarium (AOP) has confirmed that April 30, 2025 recorded the hottest April day in Armagh since daily maximum temperature records began in 1843, with a high of 23.4ºC at approximately 1.27pm with the reading taken from the Vaisala digital thermometer.
This figure exceeds all previous maximum April temperatures recorded at the site, with the previous record of 22.6°C being set on both April 25, 1975 and April 26, 1987.
Armagh is home to one of the longest-running climate records in the world, with daily weather observations dating back to 1795, and daily maximum temperature measurements beginning in 1843. These archives continue to provide valuable insight into local and global climate trends.
Shane Kelly, Meteorological Officer at AOP, said the figure marks an important data point in the organisation’s long-term climate monitoring: “This year’s April maximum of 23.4ºC is the highest we’ve recorded for the month since we began tracking daily maximum temperatures in 1843. It’s another clear indication of the increasing variability and intensity of our seasonal weather patterns.”
In response to growing evidence of climate change, AOP is reducing its own carbon footprint while also raising public awareness of environmental issues.
With support from the Northern Ireland Government, the organisation has implemented a range of sustainability measures, including:
– Retrofitting the majority of lighting systems with low-energy LED technology,
– Planting new trees across its grounds to enhance carbon sequestration,
– Installing wind and solar demonstration stations to highlight renewable energy technologies,
– Launching a climate change exhibition and planetarium show to engage visitors in the science, challenges, and solutions surrounding global warming.
Prof. Michael Burton, Director of Armagh Observatory and Planetarium, commented: “This temperature record is a timely reminder of the very real impacts of climate change. At AOP, we’re committed not just to monitoring the data, but to acting on it, through practical sustainability measures and meaningful public engagement. It’s vital we continue to promote climate awareness and empower visitors to be part of the solution.”
In addition to this new temperature record, AOP will celebrate a major milestone on 14 July 2025: the 230th anniversary of its daily weather recording series, which began in 1795. This exceptional, unbroken dataset remains a vital tool for understanding long-term environmental and climate trends.
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