Other facts from our historical weather data: When is summer in Arévalo?The hottest season / summer takes place in June, July, August and September. Does Arévalo have a dry season? Yes, the months of July and August are very dry. Which is the warmest month in Arévalo? July has an average maximum temperature of 31°C (88°F) and is the warmest month of the year. Which is the coldest month in Arévalo? The coldest month is January with an average maximum temperature of 10°C (50°F). Which is the wettest month in Arévalo? November tops the wettest month list with 56mm (2.2 in) of rainfall. Which is the driest month in Arévalo? July is the driest month with 13mm (0.5 in) of precipitation. Which is the sunniest month in Arévalo? July is the sunniest month with an average of 365 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.