Other facts from our historical weather data: Which months have the greatest rainfall in Pians? Most rainfall (rainy season) is seen in May, June, July and August. Which is the warmest month in Pians? August has an average maximum temperature of 17°C (63°F) and is the warmest month of the year. Which is the coldest month in Pians? The coldest month is January with an average maximum temperature of -3°C (27°F). Which is the wettest month in Pians? July tops the wettest month list with 203mm (8 in) of rainfall. Which is the driest month in Pians? January is the driest month with 101mm (4 in) of precipitation. 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.