September weather forecast
Kalianda, Indonesia

September, the first month of the spring in Kalianda, is still a hot month, with temperature in the range of an average high of 31.3°C (88.3°F) and an average low of 22.4°C (72.3°F).

Temperature

September's onset sees an average high-temperature of a still hot 31.3°C (88.3°F), exhibiting a slight fluctuation from the previous month. During the month of September, an average temperature of 22.4°C (72.3°F) is noted during the nights.

Heat index

In September, the average heat index is calculated to be a blisteringly hot 41°C (105.8°F). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.
Note that heat index values are valued for light wind and location in the shade. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', embodies the combination of air temperature and moisture content to illustrate perceived heat. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
By perspiring, the human body can shed its excessive warmth since evaporated sweat cools it off. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

The months with the lowest humidity are September and October, with an average relative humidity of 78%.

Rainfall

In Kalianda, in September, it is raining for 16.3 days, with typically 48mm (1.89") of accumulated precipitation. Throughout the year, there are 296.2 rainfall days, and 1712mm (67.4") of precipitation is accumulated.

Sea temperature

With an average sea temperature of 28.4°C (83.1°F), September is the month with the coldest seawater in Kalianda.
Note: Surface water temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are considered superb and highly pleasant for water activities over extended periods.

Daylight

The average length of the day in September is 12h and 5min.
On the first day of the month, sunrise is at 05:57 and sunset at 17:57. On the last day of September, sunrise is at 05:42 and sunset at 17:52 WIB.

Sunshine

With an average of 9h of sunshine, September has the most sunshine of the year.

UV index

February through December, with an average maximum UV index of 7, are months with the highest UV index in Kalianda. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 7 in September converts into the following recommendations:
Shun overexposure. Protection from sun ravages is indispensable. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Heed this! UV intensity is much stronger when reflected off sand and water.