Planning for the weather is a good way to make your trip to Sankt Michael im Lungau relaxing and enjoyable, especially when you're splurging. The hottest months are usually July and August with an average temp of 53°F, while the coldest months are January and February with an average of 24°F. The rainiest months in Sankt Michael im Lungau are August, July, June, and May, with each month seeing an average of 7 inches of rainfall.