September weather forecast
Surakarta, Indonesia

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

Temperature

The average high-temperature is a tropical 30.3°C (86.5°F) in September, hardly different from the 29.5°C (85.1°F) recorded in August. In the month of September, Surakarta's average low-temperature falls to a pleasant 20.9°C (69.6°F).

Heat index

The average heat index in September is estimated at a very hot 37°C (98.6°F). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.
Be aware that heat index ratings are designed for shaded locations and minor breezes. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Juveniles are regularly less conscious of the need to recuperate and rehydrate. Thirst is a tardy symptom of dehydration - hydration, especially during lengthy physical activities, should be maintained.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

September and October, with an average relative humidity of 74%, are the least humid months.

Rainfall

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

Daylight

In Surakarta, the average length of the day in September is 12h and 4min.
On the first day of September in Surakarta, 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. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the average person.
Note: In September, a daily maximum UV index of 7 leads to the following instructions:
Deflect overexposure. Sun protection is a necessity. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.