If you're looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Olgii: The hottest months are usually July and June, with an average temperature of 13°C, while the coldest months are January and December, with an average of -16°C. The snowiest months in Olgii are February, January, December and November, with each month seeing an average of 102 cm of snowfall.