Taking the local weather in Frantschach-Sankt Gertraud into account can help you maximise your time at the pool during your trip. 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 -1°C. The rainiest months in Frantschach-Sankt Gertraud are July, June, August and May, with each month seeing an average of 186 mm of rainfall.