Other facts from our historical weather data: Which months have the greatest rainfall in Giustino? Most rainfall (rainy season) is seen in May, June, July, August, October and November. When is winter in Giustino? The coldest season / winter is in the following months: January, February and December. Which is the warmest month in Giustino? July has an average maximum temperature of 20°C (68°F) and is the warmest month of the year. Which is the coldest month in Giustino? The coldest month is January with an average maximum temperature of -1°C (30°F). Which is the wettest month in Giustino? July tops the wettest month list with 204mm (8 in) of rainfall. Which is the driest month in Giustino? January is the driest month with 56mm (2.2 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.