San Juan Weather in September
What's the weather like in San Juan (San Juan) in September 2024?
The climate in San Juan during September can be summarized as mild and very dry.
September is in the spring in San Juan and is typically the 5th coldest month of the year. Daytime maximum temperatures average around 22°C (72°F), whilst at night 6°C (43°F) is normal.
| Daytime temperature | 22.1°C 71.7°F |
|---|---|
| Nightly temperature | 6.2°C 43.1°F |
| Average temperature | 14.1°C 57.4°F |
| Daily sunshine | 9 hrs |
| Avg rainfall | 4 mm 0.2 ins |
| Rainy days | 2 days |
| Sea temperature | 14°C 57.2°F |
| Humidity | 48% |
| Windspeed | 8.6kph 5 mph |
On average September is the 5th driest month of the year in San Juan with around 4mm 0.2 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 9 hours of sunshine per day.
September temperatures in San Juan
September rainfall
September hourly sunshine
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 San Juan in September 2024.
Other monthly averages
Best places to visit in September
San Juan weather stats
| Hottest month: | January | 33.3°C 91.9°F |
|---|---|---|
| Driest month: | May | 2mm 0.1ins |
| Sunniest month: | November | 11.4hrs |
| Coldest month: | July | 15.3°C 59.5°F |
| Wettest month: | January | 19mm 0.7ins |
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