The climate in Río Bonito during September can be summarized as warm, humid and very wet.
September is in the fall / autumn in Río Bonito and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a muggy 27°C (81°F), whilst at night 18°C (64°F) is normal.
Daytime temperature | 27.4°C 81.2°F |
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Nightly temperature | 17.9°C 64.1°F |
Average temperature | 22.6°C 72.7°F |
Daily sunshine | 5.8 hrs |
Avg rainfall | 385 mm 15.1 ins |
Rainy days | 22 days |
Sea temperature | 29.6°C 85.2°F |
Humidity | 86% |
Windspeed | 18kph 11 mph |
On average September is the wettest month of the year in Río Bonito with around 385mm 15.1 inches of rain making it a very wet time to visit. This rainfall is typically spread over 22 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.8 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 Río Bonito in September 2025.
Best places to visit in September
Hottest month: | May | 29.1°C 84.4°F |
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Driest month: | March | 26mm 1ins |
Sunniest month: | March | 8.8hrs |
Coldest month: | January | 23.8°C 74.8°F |
Wettest month: | September | 385mm 15.2ins |