September weather forecast
Depok, Indonesia

September brings a noticeable shift in the weather pattern, introducing the onset of the rainy season in Depok. The rainfall increases to 22mm (0.87"), spread over 10.7 days, signaling a shift from the dry season. Cloud cover increases whilst sunshine hours decrease, reducing daylight hours slightly. The wind speeds slightly decrease, maintaining a calm atmosphere in the city. Despite the change in season, temperatures remain steady, ensuring a comfortable climate.

Temperature

Depok records an average high-temperature of a tropical 30.8°C (87.4°F) in September, closely mirroring the climate of the previous month. In September, Depok experiences a temperature dip to an average of 22.8°C (73°F) at night.

Heat index

The average heat index in September is calculated to be a fiery hot 37°C (98.6°F). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a composite of temperature and humidity figures to convey how warm it feels. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. Excessive relative humidity disturbs the body's typical cooling process by reducing evaporation, leading to a decrease in body cooling rate and an increase in the sensation of warmth. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

With an average relative humidity of 70%, September is the least humid month.

Rainfall

In Depok, in September, it is raining for 10.7 days, with typically 22mm (0.87") of accumulated precipitation. Throughout the year, there are 244.1 rainfall days, and 1214mm (47.8") of precipitation is accumulated.

Daylight

In Depok, the average length of the day in September is 12h and 4min.
On the first day of the month, sunrise is at 05:52 and sunset at 17:52. On the last day of September, sunrise is at 05:37 and sunset at 17:47 WIB.

Sunshine

The months with the most sunshine are July through September, with an average of 9.7h of sunshine.

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 reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum UV index, 7 during September, leads to the following recommendations:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.