The climate in Usulután during September can be summarized as hot, humid and very wet.
September is in the fall / autumn in Usulután and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a muggy 29°C (84°F), whilst at night 19°C (65°F) is normal.
Daytime temperature | 28.8°C 83.8°F |
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Nightly temperature | 18.5°C 65.2°F |
Average temperature | 23.6°C 74.5°F |
Daily sunshine | 6 hrs |
Avg rainfall | 372 mm 14.7 ins |
Rainy days | 28 days |
Sea temperature | 29.5°C 85.1°F |
Humidity | 87% |
Windspeed | 7.9kph 5 mph |
On average September is the wettest month of the year in Usulután with around 372mm 14.7 inches of rain making it a very wet time to visit. This rainfall is typically spread over 28 days, although this may vary considerably.
On the flip side this corresponds to an average of 6 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 Usulután in September 2024.
Best places to visit in September
Hottest month: | April | 32.6°C 90.7°F |
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Driest month: | January | 5mm 0.2ins |
Sunniest month: | February | 9.6hrs |
Coldest month: | December | 30°C 86°F |
Wettest month: | September | 372mm 14.6ins |