UV Index
UV Index
Today's UV index in Mariehamn, Åland Islands 
will be up to 4.3, 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: 2025-05-21
With a UV index reaching up to 4.3 in Mariehamn, 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 Mariehamn, Åland Islands, is usually low to moderate, often ranging between 1 and 5 throughout the year, peaking during summer months like June and July.
Mariehamn experiences cool winters with temperatures often below freezing and mild summers with temperatures around 15-20°C. Rainfall is fairly even year-round, with slightly wetter autumn months.
Compared to mainland Finland, Mariehamn has milder winters and cooler summers due to its island location. It tends to have less snow and more moderate temperatures than neighboring countries like Sweden and Estonia.
See the UV index hour by hour for Mariehamn, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.