Guantánamo Weather in September
What's the weather like in Guantánamo (Guantánamo) in September 2025?
The climate in Guantánamo during September can be summarized as hot, humid and wet.
September is in the fall / autumn in Guantánamo and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a steamy 33°C (91°F), whilst at night 22°C (72°F) is normal.
| Daytime temperature | 32.8°C 91°F |
|---|---|
| Nightly temperature | 22.4°C 72.3°F |
| Average temperature | 27.6°C 81.7°F |
| Daily sunshine | 6.5 hrs |
| Avg rainfall | 132 mm 5.2 ins |
| Rainy days | 14 days |
| Sea temperature | 29.5°C 85°F |
| Humidity | 80% |
| Windspeed | 7.2kph 5 mph |
On average September is the 3rd wettest month of the year in Guantánamo with around 132mm 5.2 inches of rain making it a wet time to visit. This rainfall is typically spread over 14 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.5 hours of sunshine per day.
September temperatures in Guantánamo
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 Guantánamo in September 2025.
Other monthly averages
Best places to visit in September
Guantánamo weather stats
| Hottest month: | July | 33.3°C 91.9°F |
|---|---|---|
| Driest month: | December | 26mm 1ins |
| Sunniest month: | January | 7.2hrs |
| Coldest month: | January | 29.6°C 85.3°F |
| Wettest month: | October | 164mm 6.5ins |
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