San Juan, Puerto Rico - Weather and Climate
The best time to visit Juan is in the months January, February and March, these months are the most dry. Regarding average temperature there is not a big difference between summer and winter.
Because of it's high temperatures with a lot of precepation the humidity can be pretty high,but because of the nice sea breeze you won't experience it as too hot.
Average maximum day and minimum night temperature
The temperature in San Juan remains steady throughout the year, providing a consistently very warm climate. Average maximum daytime temperatures range from a very warm 31°C in August, the warmest time of the year, to a comfortable 28°C during cooler months like February.
At night, temperatures typically drop to an average of around 22°C during these months.Check out our detailed temperature page for more information.
Temperature ranges by month
Precipitation and rainy days
San Juan has a relatively rainy climate with high precipitation levels, averaging 1192 mm of rainfall annually. Significant seasonal changes in precipitation occur throughout the year. During the wetter season, September receives high rainfall, averaging 159 mm of precipitation, recorded across 18 rainy days. In contrast, the drier season, February brings less rainfall, with 47 mm over 15 rainy days. For more details, please visit our San Juan Precipitation page.
The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
While the amount of sunshine in San Juan varies throughout the year, all seasons offer their own charm. Enjoy up to 9.5 hours of daily sun in March, and experience slightly darker atmosphere in November, with about 6.8 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average water temperature
The mean water temperature over the year ranges from 26°C in January to 29°C in August.
Water temperature over the year
Average humidity
The relative humidity is high throughout the year in San Juan.
The city experiences its highest humidity in October, reaching 77%. In March, the humidity drops to its lowest level at 71%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Average wind speed
The mean wind speed over the year ranges from 2 m/s in October to 4 m/s in July.
The mean monthly wind speed over the year (meters per second)
Forecast for San Juan
Select a Month of Interest
Check the conditions for any month of the year.
The best time of year to visit San Juan in Puerto Rico
Other facts from our historical weather data:August has an average maximum temperature of 31°C and is the hottest month of the year.
The coolest month is February with an average maximum temperature of 28°C.
September tops the wettest month list with 159 mm of rainfall.
February is the driest month with 47 mm of precipitation.
March is the sunniest month with an average of 284 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
