September weather forecast
Kranji, Indonesia

The first month of the spring, September, is still a hot month in Kranji, Indonesia, with an average temperature fluctuating between 32.1°C (89.8°F) and 23.1°C (73.6°F).

Temperature

September's average high-temperature stands at a still tropical 32.1°C (89.8°F), showing little deviation from August's 31.6°C (88.9°F). Throughout the month of September, Kranji observes an average nighttime temperature of 23.1°C (73.6°F).

Heat index

The heat index value for September is evaluated at a scorching 40°C (104°F). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', reflects the feeling of heat when considering both air temperature and humidity. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
The physiological way the human body responds to excessive heat is by inducing perspiration, using sweat evaporation as a cooling mechanism. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

The months with the lowest humidity are September and October, with an average relative humidity of 68%.

Rainfall

In Kranji, in September, it is raining for 13.7 days, with typically 41mm (1.61") of accumulated precipitation. In Kranji, during the entire year, the rain falls for 242.8 days and collects up to 1039mm (40.91") of precipitation.

Daylight

In September, the average length of the day is 12h and 4min.
On the first day of September, sunrise is at 05:52 and sunset at 17:51. On the last day of the month, sunrise is at 05:37 and sunset at 17:46 WIB.

Sunshine

In Kranji, the average sunshine in September is 9.3h.

UV index

February through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: An average maximum UV index of 7 in September leads to these recommendations:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.