Vallejuelo Weather in September
What's the weather like in Vallejuelo (San Juan) in September 2025?
The climate in Vallejuelo during September can be summarized as warm, humid and very wet.
September is in the fall / autumn in Vallejuelo and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a muggy 29°C (84°F), whilst at night 15°C (60°F) is normal.
| Daytime temperature | 28.9°C 84°F |
|---|---|
| Nightly temperature | 15.3°C 59.5°F |
| Average temperature | 22.1°C 71.8°F |
| Daily sunshine | 7.5 hrs |
| Avg rainfall | 214 mm 8.4 ins |
| Rainy days | 16 days |
| Sea temperature | 29.1°C 84.3°F |
| Humidity | 80% |
| Windspeed | 10.8kph 7 mph |
On average September is the 3rd wettest month of the year in Vallejuelo with around 214mm 8.4 inches of rain making it a very wet time to visit. This rainfall is typically spread over 16 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.5 hours of sunshine per day.
September temperatures in Vallejuelo
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 Vallejuelo in September 2025.
Other monthly averages
Best places to visit in September
Vallejuelo weather stats
| Hottest month: | July | 28.9°C 84°F |
|---|---|---|
| Driest month: | January | 24mm 0.9ins |
| Sunniest month: | February | 8.2hrs |
| Coldest month: | January | 25.9°C 78.6°F |
| Wettest month: | May | 243mm 9.6ins |
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