Plan your trip to the beach with this snapshot of the seasons in Murnau am Staffelsee: The hottest months are usually July and August, with an average temperature of 15°C, while the coldest months are January and February, with an average of 0°C. The rainiest months in Murnau am Staffelsee are August, May, June and July, with each month seeing an average of 194 mm of rainfall.