UV Index
UV Index
Today's UV index in Saint Helier, Jersey 
will be up to 5.5, indicating a moderate level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.
Last checked: 2025-05-11
With a UV index reaching up to 5.5 in Saint Helier, stay shaded during midday when the sun is strongest; wear protective clothing, a wide-brimmed hat, UV-blocking sunglasses; apply SPF 30+ sunscreen every 2 hours, even on cloudy days; and be cautious of heightened UV on bright surfaces.
The UV index in Saint Helier, Jersey, varies throughout the year, reaching its peak around 6 to 7 in summer months and dropping to low levels around 1 to 2 in winter.
Seasonally, Saint Helier experiences mild winters with temperatures often above freezing and cool summers with average highs around 20°C (68°F). Rainfall is fairly evenly spread, but autumn can be wetter.
Compared to the wider region, Jersey is milder and sunnier than much of the UK, benefiting from its island location. It tends to be warmer and less rainy than mainland northern France but cooler than southern France.
See the UV index hour by hour for Saint Helier, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.