Summary of the weather data for 2024
2024 was the seventh warmest year since temperature records began in 1894.
Temperatures
The mean daily air temperature for the year was 12.94°C, making it the seventh warmest on record. It was warmer than the 1991 to 2020, 30-year average of 12.39°C. The average annual temperature takes an average of all days throughout the year, including night time minimum temperatures and daily maximum temperatures.
The average temperature in 2024 adds another stripe to our climate record, it's another darker red shade equal to that of 2015.
- the average daily maximum temperature was 0.32°C higher than the long-term 30 year average
- the average night time minimum temperature was 0.81°C above the long-term 30 year average
- the warmest day was 31 July where the temperature reached 29.7°C
- the lowest temperature was -1.4°C on 10 January
- there were 9 ground frosts and 5 air frosts
The record warmest year was 2022 with a mean daily air temperature of 13.56°C.
1963 was the coldest year on record with a mean daily air temperature of 10.20°C
Rainfall
The rainfall total for 2024 was 929.0mm. This is slightly above average when compared to the 30-year long term average of 918.2mm.
For each degree that our atmosphere warms, the atmosphere can hold 7% more moisture.
190 rain days were recorded in 2024, where at least 0.2mm of rain was recorded. This compares with a 30-year long term average of 188.2 days per year. The wettest day of the year was 18 November with 32.0mm of rain recorded.
2020 was the wettest year on record with 1,178.4mm of rainfall.
1921 was the driest year on record with 425.9mm of rainfall.
Sunshine
The sunshine total for 2024 was 2,127.9 hours. This is above the 30-year long term average of 2,092.3 hours of sunshine.
2022 was the sunniest year on record with 2,420.1 hours of sunshine.
1981 was the dullest year on record with 1,585.7 hours of sunshine.
Sea temperature
The average daily sea temperature during 2024 was 13.71°C. This is warmer than the 30-year long term average of 12.95°C.
2022 recorded the warmest average daily sea temperature with 13.95°C.
1963 was the coldest year with the average daily sea temperature of 10.93°C.
Long-term weather averages
The long-term annual weather averages for the period 1991 to 2020 were:
- mean daily air temperature of 12.39°C
- 2,092.3 hours of sunshine per year
- 918.2mm of rainfall per year
- mean daily sea temperature of 12.73°C
Temperature, sunshine and rainfall, monthly averages for the period 1991 to 2020
| January | 7.0
| 2.4
| 95.2
|
|---|
| February | 7.0
| 3.6
| 78.4
|
|---|
| March | 8.8
| 5.0
| 67.7
|
|---|
| April | 10.9
| 7.3
| 56.7
|
|---|
| May | 13.7
| 8.3
| 53.6
|
|---|
| June | 16.3
| 8.8
| 50.7
|
|---|
| July | 18.3
| 8.8
| 45.3 |
|---|
| August | 18.4
| 8.0
| 62.0
|
|---|
| September | 16.6
| 6.9
| 59.7
|
|---|
October
| 13.7
| 4.3
| 106.5
|
|---|
November
| 10.2
| 2.9
| 116.4
|
|---|
| Decemeber | 7.7
| 2.3
| 126.0
|
|---|
Source: Jersey Met,
download monthly air temperature data from 1894 and
download monthly rainfall data from 1894
About the Jersey warming stripes
The Warming Stripes were created by Professor Ed Hawkins from the University of Reading and show how temperature has changed over a period of time. Jersey’s warming stripes are very similar to stripes using data from around the World.
Each stripe represents the average temperature for a single year, relative to the average temperature taken from the 30-year long term average from 1971 to 2000. The colours are either shades of blue (cooler than the average), or red (warmer than average), the darker the colour the cooler or warmer the year.
The Warming Stripes are painted on a mural at the Waterfront, as a visual reminder of climate change.
Further information
Maison St Louis Observatory has recorded meteorological data since 1 January 1894.
The observatory makes an important contribution to studies of climate change and its impact on the Channel Islands.
Records of meteorological elements are also made at several other on-Island and offshore sites.
Data referred to on this page has been recorded at the following sites:
- temperature and rainfall at the Maison St. Louis Observatory
- sunshine at the Fort Regent Signal Station
- sea temperature at St. Helier Harbour
The Jersey Met provide live weather updates, as well as a daily weather summary. Environmental Health provide
live air quality updates. The Jersey Met also provide
weather forecasts for six days into the future.
Monthly weather data from 2009 onwards is available on the
Jersey Met climate page. Information on the climate crisis and the government response to it can be found on the climate emergency page.
gov.je