September weather forecast
Kalibata, Indonesia

The first month of the spring, September, is still a hot month in Kalibata, Indonesia, with an average temperature varying between 22.3°C (72.1°F) and 31.3°C (88.3°F).

Temperature

The transition into September notes an average high-temperature of a still hot 31.3°C (88.3°F), revealing a mild distinction from the 31°C (87.8°F) in August. An average low-temperature of 22.3°C (72.1°F) is common in Kalibata during the nights of September.

Heat index

For most parts of September, the heat index is evaluated at a sweltering 39°C (102.2°F). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
Realize that the values for the heat index are set for shaded places and light winds. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'real feel' or 'feels like', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Perspiration is essential for the human body; it facilitates cooling through the process of sweat evaporation. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. The body is at risk of dehydration and related complications when it fails to shed excessive heat.

Humidity

With an average relative humidity of 71%, September is the least humid month.

Rainfall

In Kalibata, during September, the rain falls for 17.8 days and regularly aggregates up to 84mm (3.31") of precipitation. Throughout the year, there are 295.9 rainfall days, and 1940mm (76.38") of precipitation is accumulated.

Daylight

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

Sunshine

In September, the average sunshine in Kalibata, Indonesia, is 9h.

UV index

February, April, May, July through October, with an average maximum UV index of 7, are months with the highest UV index in Kalibata. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 7 during September translates into the following directions:
Fend off overexposure. Sun protection is vital. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.