Current Climate


This page presents Puerto Rico's climate context for the current climatology, 1991-2020, derived from observed, historical data. Information should be used to build a strong understanding of current climate conditions in order to appreciate future climate scenarios and projected change. You can visualize data for the current climatology through spatial variation, the seasonal cycle, or as a time series. Analysis is available for both annual and seasonal data. Data presentation defaults to national-scale aggregation, however sub-national data aggregations can be accessed by clicking within a country, on a sub-national unit.  Other historical climatologies can be selected from the Time Period dropdown list. Data for  specific coordinates can be downloaded for in the Data Download page.

Observed, historical data is produced by the Climatic Research Unit (CRU) of University of East Anglia. Data is presented at a 0.5º x 0.5º (50km x 50km) resolution.

Puerto Rico has a tropical climate. Despite its size, several ecosystems are present: coastal and marine, dry forests and rainforests, the Puerto Rican karst, and mountainous areas.


  • Annual and monthly average temperatures have increased by 0.012° - 0.014°C per year since 1900.
  • San Juan’s observed temperature trend is higher than the rest of the island, with mean temperature increasing by 0.022°C per year since 1900.
  • A greater frequency of days with maximum temperature equal to or above 32.2°C and a lower frequency of days with temperature equal to or below 23.9°C has been recorded. During 2010 and 2011, about 100 days with temperature equal to or above 32.2°C were observed; this is the same number of days observed per decade during 1900 through 1949.


  • The southern region of Puerto Rico has experienced positive trends in annual rainfall while the western and a portion of the northern region showed decreases.
  • Negative trends in summer and positive trends in winter have been observed. Atlantic tropical storm and hurricane destructive potential as measured by the Power Dissipation Index has increased in association with warming Atlantic sea surface temperatures.