September weather forecast
Siwalankerto, Indonesia

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

Temperature

The advent of September reveals an average high-temperature of a still hot 31.7°C (89.1°F), showing minimal difference from the prior month. In Siwalankerto, the average low-temperature during the month of September is a warm 24.4°C (75.9°F).

Heat index

The heat index value for September is appraised at a sweltering 38°C (100.4°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.
Factoring in the heat index, values are geared towards shaded areas with light breezes. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', comes about by integrating the temperature readings with the humidity levels. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
Evaporating sweat, an outcome of perspiration, is key in assisting the human body to moderate its temperature. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

In September, the average relative humidity in Siwalankerto, Indonesia, is 65%.

Rainfall

In Siwalankerto, during September, the rain falls for 4.1 days and regularly aggregates up to 8mm (0.31") of precipitation. Throughout the year, in Siwalankerto, there are 187.8 rainfall days, and 839mm (33.03") of precipitation is accumulated.

Daylight

In September, the average length of the day in Siwalankerto is 12h and 4min.
On the first day of the month, sunrise is at 05:29 and sunset at 17:28. On the last day of September, sunrise is at 05:14 and sunset at 17:23 WIB.

Sunshine

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

UV index

The months with the highest UV index in Siwalankerto, Indonesia, are January through December, with an average maximum UV index of 7. January through December, with an average maximum UV index of 7, are months with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: During September, 7 as the daily maximum UV index converts into the following advice:
Resist extreme sun exposure. Guarding against solar damage is essential. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.