If you’re hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in El Cerrito: The hottest months are usually September and August, with an average temperature of 19°C, while the coldest months are July and January, with an average of 19°C. The rainiest months in El Cerrito are November, October, April and March, with each month seeing an average of 455 mm of rainfall.