September weather forecast
Sastra, Indonesia

September

Weather in September

September, the first month of the spring in Sastra, is also a hot month, with an average temperature varying between 22.6°C (72.7°F) and 31.3°C (88.3°F).

Temperature

The shift into September reveals an average high-temperature of a still hot 31.3°C (88.3°F), closely mirroring August's climate. Throughout September, the temperature in Sastra falls to an average low of 22.6°C (72.7°F).

Heat index

The heat index value during September is appraised at a sweltering 38°C (100.4°F). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.
When assessing, remember that heat index measurements are for light winds and shaded spots. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. 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 are particularly relevant to babies and toddlers. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

The months with the lowest humidity in Sastra are September and October, with an average relative humidity of 69%.

Rainfall

In Sastra, in September, during 9.5 rainfall days, 18mm (0.71") of precipitation is typically accumulated. Throughout the year, in Sastra, there are 222.3 rainfall days, and 950mm (37.4") of precipitation is accumulated.

Daylight

The average length of the day in September is 12h and 4min.
On the first day of the month, sunrise is at 05:46 and sunset at 17:45. On the last day of September, sunrise is at 05:31 and sunset at 17:40 WIB.

Sunshine

The months with the most sunshine are August and September, with an average of 9.7h of sunshine.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index in Sastra, Indonesia. January through December, with an average maximum UV index of 7, are months with the lowest UV index in Sastra. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index of 7 in September interprets into the following recommendations:
Shield from overexposure. Defense against sun-related harm is required. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.

Frequently asked questions

Is it hot in Sastra during September?
During September, Sastra experiences an average high-temperature of 31.3°C (88.3°F) and a low-temperature of 22.6°C (72.7°F). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in September is appraised at 38°C (100.4°F).
What is the least humid month in Sastra?
September and October, with an average relative humidity of 69%, are the least humid months.
What is the average humidity in September in Sastra?
The average relative humidity in September in Sastra, Indonesia, is 69%.
How much does it rain in Sastra in September?
In September, in Sastra, Indonesia, the rain falls for 9.5 days. Throughout September, 18mm (0.71") of precipitation is accumulated.
How many hours of daylight does Sastra have in September?
In September, the average day length is 12h and 4min.
When are sunrise and sunset in September in Sastra?
In September, on the first day of the month, sunrise is at 05:46 and sunset at 17:45. On the last day of the month, in Sastra, Indonesia, sunrise is at 05:31 and sunset at 17:40 WIB.
What are the months with the most sunshine in Sastra?
August and September, with an average of 9.7h of sunshine, are months with the most sunshine in Sastra.
How long on average sun shines in September in Sastra?
In September, the average sunshine duration in Sastra is 9.7h.
When is the highest UV index in Sastra?
The months with the highest UV index in Sastra are January through December, with an average maximum UV index of 7.
What are the months with the lowest UV index in Sastra?
January through December, with an average maximum UV index of 7, are months with the lowest UV index.
What is the UV index intensity in September in Sastra?
The average daily maximum UV index in September in Sastra, Indonesia, is 7. A UV Index estimate of 6 to 7 represents a high hazard to health from unsafe exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in September
Sastra, Indonesia
  • Average high temperature in September: 31.3°C

The warmest month (with the highest average high temperature) is October (31.8°C).
The month with the lowest average high temperature is February (29.4°C).

  • Average low temperature in September: 22.6°C

The months with the highest average low temperature are November and December (25°C).
The coldest month (with the lowest average low temperature) is August (22.2°C).

Average pressure in September
Sastra, Indonesia
  • Average pressure in September: 1011.4mbar

The month with the highest atmospheric pressure is September (1011.4mbar).
The month with the lowest atmospheric pressure is December (1009.2mbar).

Average wind speed in September
Sastra, Indonesia
  • Average wind speed in September: 12.2km/h

The windiest month (with the highest average wind speed) is August (12.7km/h).
The calmest month (with the lowest average wind speed) is April (6.9km/h).

Average humidity in September
Sastra, Indonesia
  • Average humidity in September: 69%

The month with the highest relative humidity is February (81%).
The months with the lowest relative humidity are September and October (69%).

Average rainfall in September
Sastra, Indonesia
  • Average rainfall in September: 18mm

The wettest month (with the highest rainfall) is December (146mm).
The driest month (with the least rainfall) is August (10mm).

Average rainfall days in September
Sastra, Indonesia
  • Average rainfall days in September: 9.5 days

The month with the highest number of rainy days is December (25.5 days).
The month with the least rainy days is August (6.5 days).

Average daylight in September /
Average sunshine in September
Sastra, Indonesia
  • Average daylight in September: 12h and 1min

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: 9h and 4min

The months with the most sunshine are August and September (Average sunshine: 9h and 42min).
The month with the least sunshine is December (Average sunshine: 8h and 12min).

Average sunshine days in September
Sastra, Indonesia
  • Average sunshine days in September: 17.8 days

The month with the most sunshine days is August (21.8 days).
The month with the least sunshine days is December (3.5 days).

Average UV index in September
Sastra, Indonesia
  • Average UV index in September: 7

The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).

Average cloud cover in September
Sastra, Indonesia
  • Average cloud cover in September: 19

The months with the most cloud cover are January and February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 17).

Average visibility in September
Sastra, Indonesia
  • Average visibility in September: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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