August weather forecast
Jakarta, Indonesia

In August, the city of Jakarta experiences incremental changes in its weather conditions from the previous month. This month sees the least amount of rainfall in the year, dropping to 35mm (1.38"), which results in fewer rainy days. The temperatures remain stable, with only minor fluctuations observed, whereas the average sunshine hours increase owing to the low rain rate. Beachgoers continue to enjoy favourable sea conditions as the sea temperature persists at 29°C (84.2°F). August's weather, marked by abundant sunshine, makes it one of Jakarta's most enticing months for visitors.

Temperature

Transitioning into August, Jakarta records an average high-temperature of a still hot 31.1°C (88°F), almost identical to July's 30.6°C (87.1°F). In the month of August, the temperature in Jakarta generally rests at an average low of 24.7°C (76.5°F).

Heat index

For most parts of August, the heat index is calculated to be a sweltering 38°C (100.4°F). Ensure extra safety steps, heat exhaustion and heat cramps are likely. Long activity might lead to heatstroke.
Note that heat index values are valued for light wind and location in the shade. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', marries air temperature and humidity to produce a value illustrating perceived warmth. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. 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 highly critical to babies and toddlers. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

In August, the average relative humidity is 70%.

Rainfall

August is the month with the least rainfall. Rain falls for 11.6 days and accumulates 35mm (1.38") of precipitation.

Sea temperature

In August, the average sea temperature is 29°C (84.2°F).
Note: For any water activity, having surface water temperatures from 25°C (77°F) to 29°C (84.2°F) is considered outstanding and highly delightful for lengthened periods.

Daylight

In Jakarta, the average length of the day in August is 11h and 55min.
On the first day of the month, sunrise is at 06:03 and sunset at 17:54. On the last day of August, sunrise is at 05:53 and sunset at 17:52 WIB.

Sunshine

In Jakarta, the average sunshine in August is 8.5h.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index of 7 in August converts into the following recommendations:
Resist extreme sun exposure. Guarding against solar damage is essential. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Warning! Reflective surfaces like sand and water amplify the Sun's UV radiation.