Taking the local weather in Stora Söderby 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 16°C, while the coldest months are January and February, with an average of -1°C. The snowiest months in Stora Söderby are December, January, November and February, with each month seeing an average of 51 cm of snowfall.