UV Index
UV Index
Today's UV index in St. Peter Port, Guernsey 
will be up to 5.2, 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: 2025-05-09
With a UV index reaching up to 5.2 in St. Peter Port, 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 St. Peter Port, Guernsey, is generally moderate, ranging from 2 in winter to around 6 or 7 during summer, indicating medium sun exposure.
Seasonally, Guernsey has mild winters with temperatures around 7-10°C and cool summers averaging 17-20°C. Rainfall is fairly evenly spread throughout the year, but autumn and winter are wetter.
Compared to the UK, Guernsey enjoys milder winters and slightly warmer summers due to its island location. It is typically sunnier and less rainy than mainland northern France and has less extreme weather than Ireland.
See the UV index hour by hour for St. Peter Port, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.