Other facts from our historical weather data: When is the rainy season in Palenque? Rainy season in Palenque occurs in the months of June, August, September and October. Which is the hottest month in Palenque? May has an average maximum temperature of 36°C (97°F) and is the hottest month of the year. Which is the coolest month in Palenque? The coolest month is January with an average maximum temperature of 29°C (84°F). Which is the wettest month in Palenque? September tops the wettest month list with 250mm (9.8 in) of rainfall. Which is the driest month in Palenque? March is the driest month with 52mm (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.