JERSEY experienced its seventh-hottest year on record last year, newly released weather data has revealed.
However, the average temperature was significantly lower in 2024 than for the previous two years.
The average reading across the year was calculated by Jersey Met to be 12.94°C – 0.65°C above the average mark across the period from 1991 to 2020.
The four hottest years on record have happened over the past 11 years: 13.23°C in 2020, 13.34°C in both 2014 and 2023, and the record mark from 2022 of 13.56°C.
Overnight temperature readings were further from the recent average (0.81°C higher) than the daytime equivalent, which was 0.32°C above average, and this feature was backed up by the recording of just nine ground frosts in 12 months, compared with the 30-year average mark of 45.8.
In other respects 2024 was closer to the norm seen in recent years, with both sunshine and rainfall totals being above average by around 2%.
Jersey Met has also published data for the first month of 2025 showing that it was the wettest-ever January recorded at the weather bureau’s headquarters, with 208.2 millimetres of rain across the month. This broke the previous record of 190.9mm, set in 2016, and was more than double the 30-year average mark of 95.2mm.
January was colder than average by a full degree, with a figure of 6°C compared with the 30-year mark of 7°C and also a little sunnier than in recent years, with 87.3 hours of sunshine being almost 20% above the average recorded between 1991 and 2020.
