Taking the local weather in Trnovo ob Soci into account can help you maximise your time at the pool during your trip. The hottest months are usually August and July, with an average temperature of 17°C, while the coldest months are January and February, with an average of 1°C. The rainiest months in Trnovo ob Soci are November, May, October and September, with each month seeing an average of 215 mm of rainfall.