September weather forecast
Cimahi, Indonesia

September brings back increments in rainfall, recording an average of 7mm (0.28"). Daytime temperatures start to cool down slightly, bidding adieu to the peak summer heat. The lower temperatures and a slight increase in precipitation make for a more comfortable atmosphere. This month's winsome weather allows for a checkerboard of both indoor and outdoor activities. With the return of some showers, the city's panorama becomes a lovely sight to behold.

Temperature

The transition into September shows a subtle variation to a still tropical 33.3°C (91.9°F) from August's 32.7°C (90.9°F) in the average high-temperature. During September, Cimahi's temperature falls to a steady low-temperature average of 22.5°C (72.5°F).

Heat index

For September, the heat index is estimated at a blisteringly hot 41°C (105.8°F). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', arises from combining readings of air temperature and relative moisture content. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
The body's natural response to excessive warmth is perspiration, as it allows for cooling through sweat evaporation. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

The least humid month is September, with an average relative humidity of 63%.

Rainfall

In Cimahi, during September, the rain falls for 5.8 days and regularly aggregates up to 7mm (0.28") of precipitation. In Cimahi, during the entire year, the rain falls for 139.1 days and collects up to 518mm (20.39") of precipitation.

Daylight

In September, the average length of the day is 12h and 4min.
On the first day of the month, sunrise is at 05:50 and sunset at 17:49. On the last day of September, sunrise is at 05:34 and sunset at 17:44 WIB.

Sunshine

In Cimahi, the average sunshine in September is 9.5h.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the ordinary person.
Note: In September, the maximum UV index of 7 translates into these guidelines:
Resist extreme sun exposure. Guarding against solar damage is essential. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.