UV Index
UV Index
Today's UV index in Helsinki, Finland 
will be up to 3.5, 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: 2025-05-09
With a UV index reaching up to 3.5 in Helsinki, 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.
Helsinki's UV index is usually low, especially in winter, because the sun stays low in the sky. During summer, the UV index can be moderate, reaching its highest around June and July.
The city experiences cold, snowy winters with temperatures often below freezing. Summers are mild and short, usually warm from June to August. Spring and autumn are brief, with cool and sometimes rainy weather.
Compared to other Nordic countries, Helsinki has milder winters than northern Finland but colder than southern Sweden. It is colder and snowier than Estonia and Latvia to the south but warmer than northern Norway and Russia during winter.
See the UV index hour by hour for Helsinki, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.