UV Index
UV Index
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Today's UV index in Saint Helier, Jersey 
will be up to 0.8, indicating low risk of harm from the sun's UV rays for the average person. Check our tips for today to make sure you're safe in the sun.
Today, the UV index suggests low sun danger (0-2) in Saint Helier, reaching up to 0.8. Remember sunglasses and SPF 30+ on sunny days, and be cautious around reflective surfaces like sand, water, and snow for increased UV exposure.
Read more here about the climate and sun exposure in and around Saint Helier.
The UV index in Saint Helier, Jersey, ranges from low to moderate throughout the year, with the peak during the summer months. It is advised to wear sunscreen (SPF 15+) and protective clothing to shield yourself from harmful UV rays.
Saint Helier experiences four distinct seasons. In spring (March to May), temperatures average around 11-15 °C (52-59 °F), with occasional rainfall. Summer (June to August) brings pleasant temperatures of 17-21 °C (63-70 °F) and lots of sunshine. Autumn (September to November) cools down to 12-16 °C (54-61 °F) with occasional showers, and winter (December to February) is mild, with temperatures ranging from 5-10 °C (41-50 °F).
Compared to its region, Saint Helier enjoys relatively moderate temperatures year-round. It receives a good amount of sunshine, although cloud cover can vary. The coastal location keeps temperatures from extremes, providing a favorable environment. Therefore, residents and visitors can enjoy a comfortable climate in this beautiful area.
The chart above displays the Shortwave Radiation Sum (MJ/m²) for each day of the last year in Saint Helier. It's designed to provide you with a better understanding of the yearly weather and sun exposure.