Though weather is just one factor, it can really affect your travel plans, especially if you are planning a longer stay in Sankt Georgen. The hottest months are usually July and August with an average temp of 59°F, while the coldest months are January and February with an average of 30°F. The rainiest months in Sankt Georgen are July, June, August, and May, with each month seeing an average of 7 inches of rainfall.