Old Harbour Bay Weather in September
What's the weather like in Old Harbour Bay (Saint Catherine) in September 2025?
The climate in Old Harbour Bay during September can be summarized as hot, humid and wet.
September is in the fall / autumn in Old Harbour Bay and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a steamy 32°C (89°F), whilst at night 23°C (74°F) is normal.
| Daytime temperature | 31.8°C 89.2°F |
|---|---|
| Nightly temperature | 23.2°C 73.8°F |
| Average temperature | 27.5°C 81.5°F |
| Daily sunshine | 7 hrs |
| Avg rainfall | 152 mm 6 ins |
| Rainy days | 14 days |
| Sea temperature | 29.3°C 84.7°F |
| Humidity | 80% |
| Windspeed | 10.1kph 6 mph |
On average September is the 2nd wettest month of the year in Old Harbour Bay with around 152mm 6 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 7 hours of sunshine per day.
September temperatures in Old Harbour Bay
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 Old Harbour Bay in September 2025.
Other monthly averages
Best places to visit in September
Old Harbour Bay weather stats
| Hottest month: | August | 32.1°C 89.8°F |
|---|---|---|
| Driest month: | January | 29mm 1.1ins |
| Sunniest month: | February | 8hrs |
| Coldest month: | January | 29.8°C 85.6°F |
| Wettest month: | October | 245mm 9.6ins |
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