Other facts from our historical weather data: When is the rainy season in Tarma? Rainy season in Tarma occurs in the months of January, February, March, November and December. Which is the warmest month in Tarma? November has an average maximum temperature of 13°C (55°F) and is the warmest month of the year. Which is the coldest month in Tarma? The coldest month is July with an average maximum temperature of 12°C (54°F). Which is the wettest month in Tarma? February tops the wettest month list with 247mm (9.7 in) of rainfall. Which is the driest month in Tarma? July 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.