Average monthly snow and rainfall in San Juan (inches)
- A lot of rain (rainy season) falls in the months: May, June, July, August, September, October, November and December.
- On average, May is the wettest month.
- On average, February is the driest month.
- The average amount of annual precipitation is: 39.37 in (999.9 mm)
Show average precipitation in San Juan in Millimeter »
Weather Forecast for San Juan
More climate information
Weather and Climate offers all the information you need to know about the climate in San Juan.
We collected past weather data from many thousand weather stations around the world. So find on this website the historical weather averages in other cities in Puerto Rico and climate and forecast data for all other countries in the world.