Weather will likely play an important role when you plan your trip to Kalfatellsstadhur, 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 Kalfatellsstadhur are September, October, February and January, with each month seeing an average of 258 mm of rainfall.