If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Alpbach: The hottest months are usually August and July, with an average temperature of 12°C, while the coldest months are January and February, with an average of -4°C. The rainiest months in Alpbach are August, July, June and May, with each month seeing an average of 217 mm of rainfall.