Planning for the weather is a good way to make your trip to Sunde relaxing and enjoyable, especially when you're splurging. The hottest months are usually August and July, with an average temperature of 14°C, while the coldest months are February and January, with an average of 3°C. The snowiest months in Sunde are January, February, December and March, with each month seeing an average of 18 cm of snowfall.