Other facts from our historical weather data: Which is the warmest month in Petropawlowsk? August has an average maximum temperature of 16°C (61°F) and is the warmest month of the year. Which is the coldest month in Petropawlowsk? The coldest month is January with an average maximum temperature of -4°C (25°F). Which is the wettest month in Petropawlowsk? October tops the wettest month list with 142mm (5.6 in) of rainfall. Which is the driest month in Petropawlowsk? June is the driest month with 73mm (2.9 in) of precipitation. Which is the sunniest month in Petropawlowsk? May is the sunniest month with an average of 193 hours of sunshine. No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.