UV Index
UV Index
Today's UV index in Tromsø, Norway 
will be up to 4.1, 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 4.1 in Tromsø, 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.
Tromsø has a low to moderate UV index, usually ranging from 0 in winter to around 3 or 4 in summer, reflecting its high latitude and limited sun intensity.
The city experiences cold winters with snow and short daylight, while summers are cool with nearly 24-hour daylight, known as the midnight sun. Seasonal changes are marked by freezing winters and mild summers.
Compared to other parts of Norway and nearby countries like Sweden and Finland, Tromsø is colder and darker in winter but milder in coastal temperatures due to the Gulf Stream's influence, making its weather somewhat unique in Arctic Europe.
See the UV index hour by hour for Tromsø, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.