The Met office has asserted that 25 was the UK’s warmest and sunniest year on record.
The three hottest years ever recorded in the UK have all occurred within the current decade, according to meteorological data, with all of the 10 warmest years recorded in the past 20 years.
Records show that 2025 is now the warmest year since measurements began in 1884, with an average temperature of 10.09°C. The years 2022 and 2023 rank as the second and third warmest, respectively.
The Met Office’s head of climate attribution, Dr Mark McCarthy, said: “2025 was the warmest year on record for the UK, surpassing the previous record set in 2022, in a series dating back to 1884. We’re increasingly seeing UK temperatures break new ground in our changing climate, as demonstrated by a new highest UK mean temperature record just three years after the last record.
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“This very warm year is in line with expected consequences of human-induced climate change. Although it doesn’t mean every year will be the warmest on record, it is clear from our weather observations and climate models that human-induced global warming is impacting the UK’s climate.”
Spring and summer in 2025 were said to be warm with multiple heatwaves, though the record hottest day was 19 July 2022, when temperatures exceeded 40C, which remains unbroken.
A Met Office scientist, Dr Emily Carlisle, said that beyond the prolonged warm spring and summer in 2025, the year was marked by consistent heat, with all months except January and September recording above-average warmth.
She added: “In the six months from March to August, every month was at least 1C above the 1991-2020 average. This resulted in the warmest spring and the warmest summer we have seen in this series.
“Meteorologically, the warmth has been driven largely by persistent high-pressure systems bringing prolonged dry, sunny conditions, alongside above-average sea temperatures around the UK. These factors have combined to keep temperatures consistently higher than normal for much of the year.”
Also, 2025 was the sunniest year in records dating back to 1910, with a total of 1,648.5 hours of sunshine recorded across the UK.
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