September weather forecast
Jamaica

September in Jamaica is part of the hot and rainy season, characterized by high humidity levels and frequent rainfall. Daytime temperatures in the lowland areas often exceed 30°C (86°F), creating a hot and humid environment. The coastal regions, however, benefit from cooling sea breezes, providing a more comfortable climate during the day.

During the night, temperatures in the plains maintain their warmth, rarely dropping below 21.1°C (70°F). The higher altitudes of the mountains, notably the Blue Mountains, offer a cooler respite with temperatures fluctuating between 15°C (59°F) and 22.2°C (72°F).

Rainfall in September is quite substantial, with intense showers more likely to occur. Although these showers often happen in the afternoon, they may be more prolonged and less predictable than in previous months. Mornings and late evenings generally provide the best opportunities for outdoor activities.

Despite the increased rainfall, September still averages approximately 8 hours of sunlight each day. This ensures that the sandy beaches, such as those in Seven Mile Beach and Boston Bay, remain appealing to visitors.

The wind conditions in September are similar to the previous months, with wind speeds typically ranging from 19.3km/h (12mph) to 24.1km/h (15mph). However, the wind might become stronger in the lead up to and during showers, offering a refreshing breeze in the heat.

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• Kingston - September »
  The month with the warmest seawater in Kingston is September, with an average sea temperature of 29.5°C (85.1°F). In Kingston, Jamaica, in September, the average water temperature is 29.5°C (85.1°F).
• Montego Bay - September »
  On the first day of September in Montego Bay, Jamaica, sunrise is at 05:57 and sunset at 18:25. In Montego Bay in September, the average water temperature is 29.8°C (85.6°F).
• Portmore - September »
  September ushers in a minor drop in temperature in Portmore preparing the city for the approaching autumn season. The month with the warmest seawater in Portmore is September, with an average sea temperature of 29.5°C (85.1°F).
• Mandeville - September »
  In Mandeville, Jamaica, during September, the rain falls for 27.3 days and regularly aggregates up to 190mm (7.48") of precipitation. In September, the average heat index, which factors the actual air temperature with the relative humidity, is calculated to be 37°C (98.6°F).
• Old Harbour - September »
  September registers the second-highest sea temperature of 29.7°C (85.5°F) in Old Harbour, only marginally cooler than August. In Old Harbour, Jamaica, in September, the average water temperature is 29.7°C (85.5°F).
• Port Antonio - September »
  In Port Antonio, Jamaica, in September, the average water temperature is 29.8°C (85.6°F). In Port Antonio, Jamaica, in September, during 14 rainfall days, 220mm (8.66") of precipitation is typically accumulated.
• Saint Ann's Bay - September »
  Hence, September showcases the diversity in Saint Ann's Bay's tropical climate, impulsively switching between heat, humidity, and rain. The months with the warmest seawater in Saint Ann's Bay are August and September, with an average sea temperature of 29.8°C (85.6°F).
• Bog Walk - September »
  In Bog Walk, in September, during 23.1 rainfall days, 106mm (4.17") of precipitation is typically accumulated. In Bog Walk, in September, it is raining for 23.1 days, with typically 106mm (4.17") of accumulated precipitation.
• Constant Spring - September »
  In Constant Spring, Jamaica, in September, during 27.1 rainfall days, 154mm (6.06") of precipitation is typically accumulated. On the first day of September in Constant Spring sunrise is at 05:52 and sunset at 18:20.
• Ewarton - September »
  The initiation of September in Ewarton records an average high-temperature of a still tropical 31.4°C (88.5°F), displaying a near consistency with the previous month. In Ewarton, Jamaica, in September, it is raining for 23.1 days, with typically 106mm (4.17") of accumulated precipitation.