October weather forecast
Jakarta, Indonesia

October's weather in Jakarta is indicative of the impending wet season. The month records increased rainfall that jumps to 69mm (2.72") from 46mm (1.81") in September. The returning rainy conditions trigger temperature and humidity levels to register slight increments. Regardless of the getting wetter weather, the sea temperature remains steady at 29°C (84.2°F). The dive into the wet season does not notably impact the sunshine hours, which stay relatively high.

Temperature

October brings the highest temperatures, with an average high of 31.8°C (89.2°F) and an average low of 26°C (78.8°F).

Heat index

The heat index value for October is calculated to be a sweltering 39°C (102.2°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
When referencing the heat index, its values are suitable for shady environments and light breezes. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for 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.
The human body keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. In high relative humidity, the body's ability to evaporate heat is diminished, resulting in a heightened feeling of warmth. When body heat isn't effectively managed, risks of dehydration and overheating amplify.

Humidity

The least humid month is October, with an average relative humidity of 67%.

Rainfall

In Jakarta, in October, it is raining for 20 days, with typically 69mm (2.72") of accumulated precipitation. Throughout the year, there are 252 rainfall days, and 1150mm (45.28") of precipitation is accumulated.

Sea temperature

In October, the average sea temperature is 29°C (84.2°F).
Note: Engaging in swimming, diving, or other water activities is highly enjoyable in temperatures ranging from 25°C (77°F) to 29°C (84.2°F), without any unpleasant sensations for prolonged durations.

Daylight

In Jakarta, the average length of the day in October is 12h and 14min.
On the first day of the month, sunrise is at 05:37 and sunset at 17:47. On the last day of October, sunrise is at 05:26 and sunset at 17:46 WIB.

Sunshine

In Jakarta, the average sunshine in October is 9.5h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index in Jakarta. January through December, with an average maximum UV index of 7, are months with the lowest UV index. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: In October, the maximum UV index of 7 suggests this advice:
Ward off overexposure. Defence against solar harm is crucial. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Stay aware! UV radiation is magnified when reflecting off sand and water.