Taking into account the local weather in Kostel’Tsevskiy can help you maximize your time at the pool during your trip. The hottest months are usually August and July with an average temp of 65°F, while the coldest months are January and February with an average of 26°F. The snowiest months in Kostel’Tsevskiy are January, February, December, and November, with each month seeing an average of 27 inches of snowfall.