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 Guayaquil: The hottest months are usually November and December, with an average temperature of 25°C, while the coldest months are August and September, with an average of 24°C. The rainiest months in Guayaquil are March, February, April and January, with each month seeing an average of 413 mm of rainfall.