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The climate of Guernsey
The Isle of Guernsey is one of the Channel Isles. Just like Jersey it is situated fairly close to the French coast. Therefore the moderate maritime climate very much resembles the climate of the region of Brittany in France. Compared with the inland of Brittany Guernsey has milder weather in the winter months. Under the influence of the relatively warm sea-water it cools down less strongly than the European continent. The capital of Saint Peter Port has, due to its favorable situation on the east coast of Guernsey, a strikingly small number of days that it actually comes to frost. Even in the coolest months the temperature often stays above freezing-point at night. With an average of 4 to 6 degrees above zero it is some five to seven degrees warmer than in the mainland of Great Britain.


Mild winters
The mild winters and the reasonably steady pattern of precipitation make it possible for subtropical plants such as palm trees to survive very well on the Isle of Guernsey. However it might be possible wine is not produced on a large scale in Guernsey. The winter months are not only reasonably warm, but the sun also appears regularly considering the region. In the darkest months minimal appr. two hours of sunshine a day is still registered. The summer months are good for no fewer than at least an average of eight hours of sunshine a day. With an average of 35 to 45 millimeters of precipitation per month the summer is drier than the rest of the year. Concerning the statistics of precipitation Guernsey does even considerably better than many West European countries in the summer months.

Mild summers
The summers are seldom hot in Guernsey. Anyone who wants tropical temperatures better looks for another holiday destination. However anyone who looks for sunny and dry weather with agreeable temperatures between 18 and 23 degrees is lucky in Guernsey. Therefore the isle is extremely suitable for all kinds of outdoor activities such as walking and cycling. It is not for nothing that you can find many walking- and cycling routes where you can enjoy yourself excellently. In the summer months also various festivals and other events are organized.

Climate figures
The figures below are based on registered weather data for more than one year and are an average for Guernsey.
Remark: Slight deviations may locally occur.

temperature (°C)


temperature (°C)
hours of sunshine

average days with precipitation
per month
per month
temperature (°C)
January 9 5 2 18 10
February 8 4 3 16 9
March 10 5 4 17 9
April 12 6 6 15 10
May 15 9 8 14 12
June 17 11 8 12 14
July 20 13 8 11 16
August 20 14 7 13 17
September 18 13 6 14 16
October 15 11 4 16 15
November 12 8 2 17 13
December 10 6 2 19 11
= 0-5 mm ● = 6-30 mm ● = 31-60 mm ● = 61-100 mm ● = 101-200 mm ● = over 200 mm
= 0-0.2 inches ● = 0.2-1.2 inches ● = 1.2-2.4 inches ● = 2.5-4 inches ● = 4.1-8 inches ● = over 8 inches

More climate information
Climate figures come in handy but do not offer a total impression of the climate and the possible weather circumstances within a particular period. You cannot often find in figures how big the chance is of wintry weather, (extreme) heat or hurricanes. Therefore we monthly offer useful extra climate information:

chance of
(very) hot


chance of
(very) cool
chance of

chance of
chance of
sunny days


click here for the explanation of the symbols


The information at this site was carefully composed from climate data collected by meteorological services, meteorological offices, climate experts and other sources. “More climate info” is based on statistics, climate data and personal experience. No rights can be derived from this site. Weather has no memory and gives no guaranties. Nothing is as changeable and unpredictable as the weather. The authors of this site feel in no way responsible for any damages caused by misinterpretation or other circumstances that may influence your holiday or trip to a certain destination. We provide information, it’s up to the reader to use it to it’s benefit.


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