UV Index
UV Index
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Today's UV index in Saint Helier, Jersey 
will be up to 5, indicating a moderate level of sun exposure for the average person. Check the annual sun radiation in the city and our tips for today to make sure you're safe in the sun.
With a UV index reaching up to 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, can reach high levels during the summer months, with a maximum index of 8. The rest of the year, the UV index is generally low to moderate.
Saint Helier experiences a temperate maritime climate, with mild winters and cool summers. Rainfall is distributed evenly throughout the year, and the city is known for its changeable weather conditions.
Compared to its region and neighboring countries, Saint Helier has a milder climate than mainland Britain and France. Its southerly location in the English Channel and proximity to the Atlantic Ocean contribute to its moderate temperatures and high humidity.
The chart below displays the average Shortwave Radiation Sum (MJ/m²) for each month of the last year in Saint Helier. It's designed to provide you with a better understanding of the yearly weather and sun exposure.