Last updated: March 2, 2024
The weather in Old Harbour, Jamaica, during September is characterized by an average temperature of 27°C (81°F). Highs can soar to 32°C (90°F), while lows may dip to 24°C (75°F). Typically, the humidity level in Old Harbour throughout September hovers around 77%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In September, Old Harbour averages 122 mm (4.8 inches) of rainfall, typically over the course of 19 rainy days. The month enjoys an average of 12 hours 12 minutes of daylight, with the sun shining for approximately 10 hours 38 minutes each day. Additionally, there is a 55% probability of sunny days during this period.
Precipitation
Rainy days
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Chance of sun
In September, the UV Index in Old Harbour reaches a maximum of 12, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 10 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 1 | 3 | 6 | 9 | 11 | 12 | 11 | 9 | 5 | 3 | 1 | 1 | 0 |
| Exposure | Low | Moderate | High | VeryHigh | Extreme | VeryHigh | Moderate | Low | |||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 10 min | 15 min | 30 min | 45 min | |||||