The climate in Sinamaica during September can be summarized as very hot, humid and damp.
September is in the fall / autumn in Sinamaica and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a steamy 34°C (93°F), whilst at night 25°C (77°F) is normal.
Daytime temperature | 33.7°C 92.7°F |
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Nightly temperature | 24.9°C 76.8°F |
Average temperature | 29.3°C 84.7°F |
Daily sunshine | 6.8 hrs |
Avg rainfall | 112 mm 4.4 ins |
Rainy days | 8 days |
Sea temperature | 28.4°C 83.2°F |
Humidity | 76% |
Windspeed | 13kph 8 mph |
On average September is the 3rd wettest month of the year in Sinamaica with around 112mm 4.4 inches of rain making it a damp time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.8 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 Sinamaica in September 2025.
Best places to visit in September
Hottest month: | August | 34.4°C 93.9°F |
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Driest month: | March | 7mm 0.3ins |
Sunniest month: | February | 8.5hrs |
Coldest month: | January | 31.6°C 88.9°F |
Wettest month: | October | 170mm 6.7ins |