The climate in Puerto Rico during September can be summarized as warm and dry.
September is in the fall / autumn in Puerto Rico and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a comfortable 25°C (78°F), whilst at night 18°C (65°F) is normal.
Daytime temperature | 25.4°C 77.7°F |
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Nightly temperature | 18.4°C 65.1°F |
Average temperature | 21.9°C 71.4°F |
Daily sunshine | 8.4 hrs |
Avg rainfall | 11 mm 0.4 ins |
Rainy days | 2 days |
Sea temperature | 23.3°C 73.9°F |
Humidity | 68% |
Windspeed | 15.5kph 10 mph |
On average September is the 5th driest month of the year in Puerto Rico with around 11mm 0.4 inches of rain making it a dry time to visit. This rainfall is typically spread over 2 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.4 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Puerto Rico in September 2024.
Best places to visit in September
Hottest month: | August | 25.7°C 78.3°F |
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Driest month: | July | 1mm 0ins |
Sunniest month: | August | 9.8hrs |
Coldest month: | January | 18.1°C 64.6°F |
Wettest month: | December | 45mm 1.8ins |