Weather is probably a major factor when you plan your trip to Vik I Myrdal, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually July and August, with an average temperature of 9°C, while the coldest months are December and January, with an average of -1°C. The rainiest months in Vik I Myrdal are September, February, October and January, with each month seeing an average of 231 mm of rainfall.