Planning for the weather is a good way to make your trip to Ålesund relaxing and enjoyable, especially when you’re splurging. The hottest months are usually August and July, with an average temperature of 13°C, while the coldest months are February and January, with an average of 3°C. The rainiest months in Ålesund are October, September, December and January, with each month seeing an average of 258 mm of rainfall.