Planning for the weather is an important factor for making your trip to Mauterndorf a success, especially when you’re splurging. The hottest months are usually July and August, with an average temperature of 11°C, while the coldest months are January and February, with an average of -5°C. The rainiest months in Mauterndorf are August, July, June and May, with each month seeing an average of 180 mm of rainfall.