September weather forecast
Manahan, Indonesia

September, the first month of the spring in Manahan, is a tropical month, with an average temperature fluctuating between 20.9°C (69.6°F) and 30.3°C (86.5°F).

Temperature

Manahan starts September with an average high-temperature of a hot 30.3°C (86.5°F), a minor shift from August's 29.5°C (85.1°F). Throughout September, Manahan witnesses a consistent average low-temperature of 20.9°C (69.6°F).

Heat index

For September, the heat index is calculated to be a sweltering 37°C (98.6°F). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.
Heat index determinations are made taking into account the shade and light air movements. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', provides an understanding of perceived warmth by combining temperature and relative humidity. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. 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.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

The months with the lowest humidity in Manahan are September and October, with an average relative humidity of 74%.

Rainfall

In September, in Manahan, the rain falls for 13.6 days. Throughout September, 48mm (1.89") of precipitation is accumulated. In Manahan, during the entire year, the rain falls for 276.6 days and collects up to 2049mm (80.67") of precipitation.

Daylight

The average length of the day in September in Manahan, Indonesia, is 12h and 4min.
On the first day of September in Manahan, sunrise is at 05:37 and sunset at 17:35. On the last day of the month, sunrise is at 05:21 and sunset at 17:31 WIB.

Sunshine

August and September, with an average of 9.2h of sunshine, are months with the most sunshine.

UV index

September and October, with an average maximum UV index of 7, are months with the highest UV index in Manahan. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the average person.
Note: The daily high UV index of 7 in September translates into this advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays.