The climate of Jersey, city by city
This page lists the 2 cities in Jersey 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.
Average across cities
11.8°C
Annual rainfall
928mm
Spread between cities
0.1°C
Warming
+1.2°C
Frequently asked questions
What is the hottest city in Jersey?
The hottest city in Jersey is St Lawrence, with an average annual temperature of 11.9 °C.
What is the coldest city in Jersey?
The coldest city in Jersey is Saint Helier, with an average annual temperature of 11.8 °C.
What is the wettest city in Jersey?
The wettest city in Jersey is Saint Helier, with 963 mm of precipitation per year.
Has the climate of Jersey warmed?
Based on its largest cities, Jersey warmed by +1.2 °C between 1940 and 2025.