Weather will likely play an important role when you plan your trip to Sankt Stefan im Gailtal, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually July and August, with an average temperature of 16°C, while the coldest months are January and February, with an average of -1°C. The rainiest months in Sankt Stefan im Gailtal are November, May, October and June, with each month seeing an average of 230 mm of rainfall.