UV Index
UV Index
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Today's UV index in Mariehamn, Åland Islands 
will be up to 2.5, indicating a low 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.
Today, the UV index suggests low sun danger (0-2) in Mariehamn, reaching up to 2.5. Remember sunglasses and SPF 30+ on sunny days, and be cautious around reflective surfaces like sand, water, and snow for increased UV exposure.
The UV index in Mariehamn, Åland Islands can reach a high of 7 during the summer months. In winter, the UV index is generally low, rarely exceeding 1.
Mariehamn experiences four distinct seasons. Spring is mild and sunny, summer brings long daylight hours and warm temperatures, autumn is cool and colorful, and winter is snowy with short daylight hours.
Compared to its region and neighboring countries, Mariehamn has a milder climate due to its coastal location and the moderating effects of the Baltic Sea. While nearby Sweden and Finland can have very cold winters, Mariehamn's winter temperatures are generally less extreme.
The chart below displays the average Shortwave Radiation Sum (MJ/m²) for each month of the last year in Mariehamn. It's designed to provide you with a better understanding of the yearly weather and sun exposure.