Weather is probably a major factor when you plan your trip to Yuzhno-Sakhalinsk, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually August and July, with an average temperature of 15°C, while the coldest months are February and January, with an average of -9°C. The snowiest months in Yuzhno-Sakhalinsk are March, January, February and December, with each month seeing an average of 249 cm of snowfall.