If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Curridabat: The hottest months are usually March and April, with an average temperature of 20°C, while the coldest months are January and February, with an average of 19°C. The rainiest months in Curridabat are October, June, September and August, with each month seeing an average of 650 mm of rainfall.