Jersey will see another dark red line added to the Climate Stripe mural, with 2025 marking the fourth warmest year on record.
The average temperature was 13.3°C, 0.3°C cooler than 2022, which was the warmest year so far.
The warmest day was 30 June, with temperatures reaching 33.4°C, compared to 3 January, which recorded Jersey's lowest temperature, 0.1°C.
Spring as a whole was the warmest ever recorded, with April was the fourth warmest on record, and May the third warmest.
Read: Warmest spring on record in Jersey
June was also the warmest on record, with a heatwave between 19 and 21 of the month where temperatures reached above 30°C and a tropical night on the longest day of the year when it didn't dip below 22.1°C.
Overall, summer was the fourth warmest and the sea temperature was the second warmest.
2025 was also the fourth sunniest year on record, with almost 2383 hours of sunshine thanks to an unusually sunny spring.
Record, taken from Fort Regent Signal Station, date back to 1925.
823.6 mm of rain fell throughout the year, with the wettest day being 29 January, when the island recorded 43.4 mm of rain in one day.
Jersey saw more than double the thirty-year average of rain in January alone, with more than 200 mm.
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