September weather forecast
Gulun, Indonesia

September, the first month of the spring in Gulun, is a tropical month, with an average temperature varying between 21.5°C (70.7°F) and 30.3°C (86.5°F).

Temperature

Gulun commences September with an average high-temperature of a tropical 30.3°C (86.5°F), maintaining a close resemblance to the previous month. Gulun experiences a mean temperature of 21.5°C (70.7°F) during September nights.

Heat index

September's average heat index is calculated to be a sweltering 37°C (98.6°F). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. 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.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.

Humidity

September and October, with an average relative humidity of 75%, are the least humid months in Gulun, Indonesia.

Rainfall

In September, the rain falls for 13.1 days. Throughout September, 38mm (1.5") of precipitation is accumulated. Throughout the year, there are 247.2 rainfall days, and 1234mm (48.58") of precipitation is accumulated.

Daylight

In Gulun, the average length of the day in September is 12h and 4min.
On the first day of the month, sunrise is at 05:35 and sunset at 17:33. On the last day of September, sunrise is at 05:19 and sunset at 17:29 WIB.

Sunshine

The average sunshine in September is 9.1h.

UV index

February, September and October, 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 unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index of 7 in September interprets into the following recommendations:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.