If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in El Edén: The hottest months are usually August and September, with an average temperature of 18°C, while the coldest months are December and January, with an average of 17°C. The rainiest months in El Edén are July, June, August and May, with each month seeing an average of 1559 mm of rainfall.