Planning for the weather is a good way to make your trip to Skaftafell relaxing and enjoyable, especially when you’re splurging. The hottest months are usually July and August with an average temp of 49°F, while the coldest months are December and January with an average of 30°F. The rainiest months in Skaftafell are September, February, October, and January, with each month seeing an average of 9 inches of rainfall.