September weather forecast
Cisi'ih, Indonesia

The first month of the spring, September, is also a hot month in Cisi'ih, Indonesia, with temperature in the range of an average low of 23.5°C (74.3°F) and an average high of 31.6°C (88.9°F).

Temperature

The average high-temperature during September registers at a still tropical 31.6°C (88.9°F), closely corresponding to the preceding month. Cisi'ih usually reports an average low-temperature of 23.5°C (74.3°F) during the month of September.

Heat index

The heat index value for September is appraised at a blisteringly hot 40°C (104°F). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', melds the effects of warmth and moisture to generate a feeling of heat. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly meaningful for babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.

Humidity

The months with the lowest humidity in Cisi'ih are September and October, with an average relative humidity of 71%.

Rainfall

In Cisi'ih, during September, the rain falls for 16 days and regularly aggregates up to 47mm (1.85") of precipitation. Throughout the year, there are 291.3 rainfall days, and 1460mm (57.48") of precipitation is accumulated.

Sea temperature

September is the month with the coldest seawater, with an average sea temperature of 27.2°C (81°F).
Note: For engaging in water activities including swimming and diving, temperatures from 25°C (77°F) to 29°C (84.2°F) are perceived as perfect, providing pleasure for extended durations.

Daylight

In Cisi'ih, the average length of the day in September is 12h and 4min.
On the first day of September, sunrise is at 05:55 and sunset at 17:54. On the last day of the month, sunrise is at 05:40 and sunset at 17:50 WIB.

Sunshine

The month with the most sunshine is September, with an average of 9.3h of sunshine.

UV index

February through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In September, the maximum UV index of 7 suggests this advice:
Inhibit overexposure. Warding off sun damage is of utmost importance. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Take warning! Reflective sand and water surfaces intensify the Sun's UV rays.