If you planning to travel to Kastelholm Castle, Mariehamn, Finland, here is your 6-day travel weather forecast to make sure you have all the essentials needed during your stay. Start your day when the sunrises at 6:59 AM. The temperature feels like 26.099999999999998 with a humidity level of 89 so dress accordingly. Cloud coverage is 38 percent with visibility at 14 percent. Today’s UV index is 2, don’t forget the sunscreen if you need it! Today’s winds are traveling south-southwest at a speed of 8 MPH. At the end of the day don’t miss the sunset at 1:51 PM.