San Juan · Puerto Rico
Weather in San Juan in September
In September the typical daytime high in San Juan is 33.1 °C on average, from 33.3 °C at the start to 32.9 °C at the end of the month.
The last 10 years were 1.3 °C warmer than more than 40 years ago.
Click a day for more: afternoon and night, the usual range, records and how fast it is warming.
Measured at the weather station Ponce, 66 km away.