September weather forecast
Cisereh, Indonesia

The first month of the spring, September, is still a hot month in Cisereh, Indonesia, with temperature in the range of an average low of 23.7°C (74.7°F) and an average high of 31.8°C (89.2°F).

Temperature

The arrival of September brings an average high-temperature of a still tropical 31.8°C (89.2°F), subtly diverging from August's 31.3°C (88.3°F). During the nights in September, Cisereh experiences a consistent average temperature of 23.7°C (74.7°F).

Heat index

The heat index in September is estimated at a scorching 40°C (104°F). More preventive actions are needed, risk of heat exhaustion and heat cramps is significant. Prolonged activity may trigger heatstroke.
Heat index determinations are made taking into account the shade and light air movements. 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 'feels like' or 'real feel', is a metric representing the sensation of warmth when air temperature and moisture come together. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
Perspiring is a crucial mechanism for the human body, allowing it to release excessive warmth through evaporating sweat. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

September and October, with an average relative humidity of 71%, are the least humid months.

Rainfall

In Cisereh, during September, the rain falls for 17.2 days and regularly aggregates up to 55mm (2.17") of precipitation. Throughout the year, there are 292.5 rainfall days, and 1468mm (57.8") of precipitation is accumulated.

Daylight

In Cisereh, the average length of the day in September is 12h and 4min.
On the first day of September, sunrise is at 05:54 and sunset at 17:53. On the last day of the month, sunrise is at 05:39 and sunset at 17:48 WIB.

Sunshine

In Cisereh, the average sunshine in September is 9.1h.

UV index

February through December, with an average maximum UV index of 7, are months with the highest UV index in Cisereh. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum daily UV index of 7 during September translates into the following directions:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Always opt for UVA and UVB-resistant sunglasses on radiant days.