September weather forecast
Ibu, Indonesia

September, the first month of the autumn in Ibu, is still a warm month, with an average temperature fluctuating between 29.5°C (85.1°F) and 25.4°C (77.7°F).

Temperature

Ibu's average high-temperature in September is a still moderately hot 29.5°C (85.1°F), marking an insignificant difference from the 29.3°C (84.7°F) of August. Ibu's September nights demonstrate minimal variation from the daytime temperatures, with an average of 25.4°C (77.7°F).

Heat index

September's heat index is estimated at a torrid 36°C (96.8°F). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.
When referencing the heat index, its values are suitable for shady environments and light breezes. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a numerical representation of warmth when taking temperature and moisture levels into account. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

Humidity

In Ibu, Indonesia, the average relative humidity in September is 78%.

Rainfall

September is the month with the least rainfall. Rain falls for 20.5 days and accumulates 73mm (2.87") of precipitation.

Daylight

The average length of the day in September is 12h and 7min.
On the first day of the month, sunrise is at 06:25 and sunset at 18:33. On the last day of September, sunrise is at 06:16 and sunset at 18:22 WIT.

Sunshine

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

UV index

The months with the highest UV index in Ibu are January through October, 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 daily UV index of 7 in September interprets into the following recommendations:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.