The climate of Puerto Rico, city by city
This page lists the 21 cities in Puerto Rico for which climate normals are available. Each entry covers temperature, rainfall and how the climate changed between 1940 and 2025, computed from ERA5 reanalysis data.
+1.3 °C since 1940
Frequently asked questions
What is the hottest city in Puerto Rico?
The hottest city in Puerto Rico is Mayagüez, with an average annual temperature of 26.0 °C.
What is the coldest city in Puerto Rico?
The coldest city in Puerto Rico is Cayey, with an average annual temperature of 24.6 °C.
What is the wettest city in Puerto Rico?
The wettest city in Puerto Rico is Humacao, with 1,380 mm of precipitation per year.
Has the climate of Puerto Rico warmed?
Based on its largest cities, Puerto Rico warmed by +1.3 °C between 1940 and 2025.