September weather forecast
Kertajaya, Indonesia

The first month of the spring, September, is also a hot month in Kertajaya, Indonesia, with an average temperature ranging between max 31.7°C (89.1°F) and min 24.4°C (75.9°F).

Temperature

Transitioning into September, Kertajaya experiences an average high-temperature of a still tropical 31.7°C (89.1°F), marking a minor shift from the preceding month. Nighttime temperatures in September average to a moderately hot 24.4°C (75.9°F) in Kertajaya, Indonesia.

Heat index

For September, the heat index is estimated at a torrid 38°C (100.4°F). Take more safety measures, heat exhaustion and heat cramps are potential outcomes. Persistent activity might lead to heatstroke.
Records show heat index calculations are tailored for shaded regions and mild winds. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important 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.
Evaporating sweat, an outcome of perspiration, is key in assisting the human body to moderate its temperature. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

In September, the average relative humidity is 65%.

Rainfall

In Kertajaya, in September, during 4.1 rainfall days, 8mm (0.31") of precipitation is typically accumulated. In Kertajaya, during the entire year, the rain falls for 187.8 days and collects up to 839mm (33.03") of precipitation.

Daylight

In Kertajaya, the average length of the day in September is 12h and 4min.
On the first day of September in Kertajaya, sunrise is at 05:29 and sunset at 17:28. On the last day of the month, sunrise is at 05:13 and sunset at 17:23 WIB.

Sunshine

The months with the most sunshine in Kertajaya are August through October, with an average of 9.9h of sunshine.

UV index

The months with the highest UV index in Kertajaya are January through December, with an average maximum UV index of 7. The months with the lowest UV index in Kertajaya are January through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for average individuals.
Note: In September, a regular UV index of 7 translates into these guidelines:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.