October weather forecast
Portmore, Jamaica

In October, the city of Portmore gradually transitions from hot summer to cooler autumn. Despite the slight drop in temperatures, they continue to be significantly warm. The month is known for even higher rainfall, reaching approximately 184mm (7.24"), making it the wettest month of the year. The balance between warm temperatures, regular showers, and substantial sunshine makes it an appealing period for vacationers. While rainfall peaks, the consistent wind speed plays a crucial role in determining the city's overall climate.

Temperature

October ushers in an average high-temperature of a warm 29.2°C (84.6°F), aligning closely with the preceding month. The nighttime temperature dips to 24°C (75.2°F) on average during October.

Heat index

In October, the heat index is appraised at a sweltering 36°C (96.8°F). Undertake additional safety actions, risk of heat cramps and heat exhaustion is significant. Persistent activity may induce heatstroke.
Heat index data is primarily for areas with shade and subjected to light winds. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is found by incorporating humidity levels into the air temperature measurement. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

October is the most humid month in Portmore, Jamaica, with an average relative humidity of 82%.

Rainfall

October is the month with the most rainfall in Portmore. Rain falls for 28.7 days and accumulates 184mm (7.24") of precipitation.

Sea temperature

In Portmore, the average seawater temperature in October is 29.3°C (84.7°F).
Note: In water activities such as swimming and diving, temperatures from 25°C (77°F) to 29°C (84.2°F) are deemed highly pleasurable for extended periods without any unease.

Daylight

In October, the average length of the day in Portmore is 11h and 44min.
On the first day of October, sunrise is at 05:58 and sunset at 17:55. On the last day of the month, sunrise is at 06:06 and sunset at 17:35 EST.

Sunshine

The average sunshine in October is 7.2h.

UV index

The months with the highest UV index are June through October, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: In October, the maximum UV index of 7 suggests these recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Be cautious! Sand and water surfaces make the Sun's UV rays more potent.