Normal weather in San Juan in September
The weather in San Juan in September has an average temperature of around 33°C during the day. On average, September sees 176 mm of rain in San Juan. The wind speed is 3 Beaufort and mainly comes from South.
After August, September in San Juan starts with a temperature of 33°C and ends around October at 33°C.
The hurricane season in San Juan lasts from early June to late November.
September averages for San Juan
 Average temperature | 33°C |
 Highest daytime temperature | 33°C |
| Lowest daytime temperature | 32°C |
 Total rainfall | 176 mm |
| Rainy days | 22 days |
Temperature per day in September in San Juan
This graph shows the average daily maximum temperatures in September in San Juan, indicated in degrees Celsius.
Rainfall per day in September in San Juan
This graph shows the average daily rainfall in September in San Juan, indicated in millimeters.
UV index per day in September in San Juan
This graph shows the average daily UV index in September in San Juan.
Yearly temperature in September in San Juan
This graph shows the average yearly temperature in September in San Juan, measured in degrees Celsius, over the past years.
Yearly total rainfall in September in San Juan
This graph shows the average yearly rainfall in millimeters in September in San Juan, over the past years.
Average daily weather in September
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Experiences with the weather in September in San Juan
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Average weather in San Juan per month
Click on a month below to see in detail how the weather typically is in San Juan and what to expect. Based on the historical weather data of San Juan, you can view the average temperature, rainfall, wind, and UV index for each day of the month.