Weather can make or break a road trip, so here's some data about year-round temperatures in Rudny to help you plan yours: The hottest months are usually July and August, with an average temperature of 19°C, while the coldest months are January and February, with an average of -11°C. The snowiest months in Rudny are January, March, February and December, with each month seeing an average of 159 cm of snowfall.