UV Index
UV Index
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Today's UV index in Helsinki, Finland 
will be up to 3.6, 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 3.6 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.
The UV index in Helsinki, Finland is generally low to moderate, rarely reaching high levels. This is due to the city's high latitude, which results in long, dark winters and short, cool summers.
Helsinki experiences four distinct seasons. Winters are long and cold, with temperatures often dropping below freezing. Spring brings milder temperatures and longer days, while summer is relatively short but warm, with highs typically in the mid-to-high 60s Fahrenheit. Autumn sees a gradual cooling and the return of shorter days.
Compared to its region and neighboring countries, Helsinki's climate is relatively mild. This is due to its coastal location and the moderating influence of the Baltic Sea. While inland areas of Finland and neighboring countries like Russia and Sweden can experience much colder temperatures in winter, Helsinki's winters are moderated by the sea, resulting in slightly milder temperatures.
The chart below displays the average Shortwave Radiation Sum (MJ/m²) for each month of the last year in Helsinki. It's designed to provide you with a better understanding of the yearly weather and sun exposure.