Other facts from our historical weather data: Which is the hottest month in Arauca? March has an average maximum temperature of 35°C (95°F) and is the hottest month of the year. Which is the coolest month in Arauca? The coolest month is July with an average maximum temperature of 30°C (86°F). Which is the wettest month in Arauca? June tops the wettest month list with 402mm (15.8 in) of rainfall. Which is the driest month in Arauca? January is the driest month with 19mm (0.7 in) of precipitation. Which is the sunniest month in Arauca? January is the sunniest month with an average of 262 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.