The climate of Guernsey, city by city
This page lists the 3 cities in Guernsey for which climate normals are available. Each entry covers temperature, rainfall and how the climate changed between 1940 and 2025, computed from ERA5 reanalysis data.
+1.2 °C since 1940
Frequently asked questions
What is the hottest city in Guernsey?
The hottest city in Guernsey is St Peter Port, with an average annual temperature of 11.9 °C.
What is the coldest city in Guernsey?
The coldest city in Guernsey is St Peter Port, with an average annual temperature of 11.9 °C.
What is the wettest city in Guernsey?
The wettest city in Guernsey is St Peter Port, with 825 mm of precipitation per year.
Has the climate of Guernsey warmed?
Based on its largest cities, Guernsey warmed by +1.2 °C between 1940 and 2025.