If you're looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Sopetrán: The hottest months are usually August and July, with an average temperature of 19°C, while the coldest months are January and October, with an average of 18°C. The rainiest months in Sopetrán are May, April, October and November, with each month seeing an average of 407 mm of rainfall.