September weather forecastTonjong, Indonesia
September
Weather in September
The first month of the spring, September, is a hot month in Tonjong, Indonesia, with an average temperature fluctuating between 30.2°C (86.4°F) and 21.3°C (70.3°F).Temperature
The ushering in of September brings an average high-temperature of a hot 30.2°C (86.4°F), closely mirroring the 29.7°C (85.5°F) of August. During September, Tonjong witnesses a consistent average low-temperature of 21.3°C (70.3°F).Heat index
September's mean heat index is computed to be a sweltering 37°C (98.6°F). More preventive actions are needed, risk of heat exhaustion and heat cramps is significant. Prolonged activity may trigger heatstroke.Heat index evaluations are typically in the context of light winds and shaded environments. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', offers an insight into how hot it feels when we factor in moisture content. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.
Humidity
The months with the lowest humidity are September and October, with an average relative humidity of 76%.Rainfall
In Tonjong, during September, the rain falls for 14.8 days and regularly aggregates up to 44mm (1.73") of precipitation. Throughout the year, there are 268.1 rainfall days, and 2169mm (85.39") of precipitation is accumulated.Daylight
In Tonjong, Indonesia, the average length of the day in September is 12h and 4min.On the first day of September, sunrise is at 05:44 and sunset at 17:43. On the last day of the month, sunrise is at 05:28 and sunset at 17:38 WIB.
Sunshine
The average sunshine in September is 8.8h.UV index
The months with the highest UV index are February through June, September, October and 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 the ordinary person.Note: A maximum UV index of 7 in September translates into the following recommendations:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Tonjong, Indonesia
- Average high temperature in September: 30.2°C
The warmest month (with the highest average high temperature) is October (31°C).
The month with the lowest average high temperature is July (28.9°C).
- Average low temperature in September: 21.3°C
The months with the highest average low temperature are January and December (23.3°C).
The coldest month (with the lowest average low temperature) is August (20.8°C).
Average pressure in September
Tonjong, Indonesia
- Average pressure in September: 1011.7mbar
The month with the highest atmospheric pressure is September (1011.7mbar).
The month with the lowest atmospheric pressure is December (1009.2mbar).
Average wind speed in September
Tonjong, Indonesia
- Average wind speed in September: 9.1km/h
The windiest month (with the highest average wind speed) is September (9.1km/h).
The calmest month (with the lowest average wind speed) is April (4.6km/h).
Average humidity in September
Tonjong, Indonesia
- Average humidity in September: 76%
The month with the highest relative humidity is February (83%).
The months with the lowest relative humidity are September and October (76%).
Average rainfall in September
Tonjong, Indonesia
- Average rainfall in September: 44mm
The wettest month (with the highest rainfall) is December (312mm).
The driest month (with the least rainfall) is August (20mm).
Average rainfall days in September
Tonjong, Indonesia
- Average rainfall days in September: 14.8 days
The month with the highest number of rainy days is January (28.9 days).
The month with the least rainy days is August (10.3 days).
Average daylight in September /
Average sunshine in September
Tonjong, Indonesia
- Average daylight in September: 12h and 6min
The month with the longest days is December (Average daylight: 12h and 30min).
The month with the shortest days is June (Average daylight: 11h and 42min).
- Average sunshine in September: 8h and 48min
The month with the most sunshine is August (Average sunshine: 9h and 6min).
The month with the least sunshine is December (Average sunshine: 7h and 30min).
Average sunshine days in September
Tonjong, Indonesia
- Average sunshine days in September: 11.8 days
The month with the most sunshine days is August (17.7 days).
The month with the least sunshine days is February (0.8 days).
Average UV index in September
Tonjong, Indonesia
- Average UV index in September: 7
The months with the highest UV index are February, March, April, May, June, September, October and December (UV index 7).
The months with the lowest UV index are January, July, August and November (UV index 6).
Average cloud cover in September
Tonjong, Indonesia
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Tonjong, Indonesia
- Average visibility in September: 9km
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (9km).
The month with the lowest visibility is February (8km).
