Long-term weather averages
The long-term annual weather averages for the period 1981-2010 were:
- mean daily air temperature of 12.09°C
- 1986.1 hours of sunshine per year
- 874.7mm of rainfall per year
Temperature, sunshine and rainfall, monthly averages for the period 1981 to 2010
Source: Jersey Met
Summary of the weather data for 2016
2016 was a little warmer, wetter and sunnier than average.
The mean daily air temperature for the year was 12.40°C.
The record warmest year was 2014 with a mean daily air temperature of 13.34°C.
The highest maximum air temperature recorded during 2016 was 35.2°C on 19th July, the 3rd hottest day in the Island since records began.
The lowest minimum was -1.0°C on 20th January.
The rainfall total for the year was 923.0mm.
191 rainfall days were recorded, with 0.2mm of rainfall or more.
The wettest day of the year was 2nd August with 28.3mm of precipitation recorded.
The sunshine total for the year was 2153.5 hours.
The sunniest year on record was 2010 with 2403.2 hours of sunshine.
The mean daily sea temperature during 2016 was 13.16°C.
The highest sea temperature recorded during the year was 19.1°C on 10th September.
The lowest was 8.3°C on the 3rd, 8th, 9th and 10th of February.
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
You can find monthly weather data from 2009 onwards by following the link below.