Planning for the weather is an important factor for making your trip to Petropavlovsk a success, especially when you're splurging. The hottest months are usually July and August with an average temp of 63°F, while the coldest months are January and February with an average of 10°F. The snowiest months in Petropavlovsk are March, January, February, and December, with each month seeing an average of 63 inches of snowfall.