Temperatures in September
It's warm in September in Puerto Rico with an average temperature of 27°C. Temperatures this month range from a low of 26°C to a high of 28°C. At night, you can expect temperatures between 21°C and 23°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Puerto Rico in September. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of September
The month of September starts in Puerto Rico with hot temperatures, averaging around 28°C during the day and nights close to 23°C. You won’t see any precipitation in the first days of the month, it’s all sunny skies.
Mid-September
By mid-September, the average daytime temperature drops to around 27°C, with nights close to 22°C. Not much precipitation expected during this period. It’s mostly dry with sunshine.
Temperatures vary between day and night, so it’s smart to wear layers.
End of September
By the end of September, the average daytime temperature in Puerto Rico will be around 27°C, with nights close to 22°C. No precipitation expected, with plenty of sunshine on the horizon.
As it gets cooler in the evening, it’s best to wear layers.
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Water temperature
The water temperature at Puerto Rico is 25°C this month. Lovely temperature for a swim.
Precipitation in September
According to weather history, there is only 5,4 mm of precipitation in September. The wind speed is around 5 Bft, mostly coming from the East.
The average chance of precipitation is only 4% in September.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in September for Puerto Rico. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Puerto Rico in September |
London | ||
|---|---|---|---|
 Average Temperature |
27°C | 20°C | |
 High Temp |
28°C | 22°C | |
| Low Temp |
26°C | 17°C | |
 Total Precipitation |
5,4 mm | 44 mm | |
| Rainy Days |
1 day | 8 days | |
August
UV index
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is September a good time to visit Puerto Rico?
Want nice weather? Then September is a great time to be in Puerto Rico. You’ll have pleasant temperatures and not too much rain this month.
Temperature records for Puerto Rico in September
With 33°C, Puerto Rico hit the highest temperature in the last 10 years in September 2020. The lowest daytime temperature in this month was 22°C in 2022. The extreme night temperatures ranged from a low of 16°C to a high of 25°C.
Check out the climate of Puerto Rico for all months and discover the best travel time
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Daily Temperature in September in Puerto Rico
This chart shows the average daily temperatures, both day and night, for each day in September in Puerto Rico, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in September in Puerto Rico
The chart below shows the average daily precipitation in September for Puerto Rico, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect about 1 day of rain in Puerto Rico.
Daily UV Index in September in Puerto Rico
This chart shows the average daily UV index in September in Puerto Rico, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Puerto Rico Over the Years
This chart shows the average temperature in September in Puerto Rico, measured in degrees Celsius, over the past years.
Total Precipitation in September in Puerto Rico Over the Years
This chart shows the average precipitation in September in Puerto Rico, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in September for Puerto Rico
Click on a specific day in September for detailed info on the typical weather on that day in Puerto Rico. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Puerto Rico
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Average Weather in Puerto Rico by Month
Click on a month below to see detailed weather info for Puerto Rico. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Puerto Rico for all months at once
