September weather forecast
Sruni, Indonesia

September

Weather in September

September, the first month of the spring in Sruni, is still a hot month, with an average temperature varying between 22.5°C (72.5°F) and 33.9°C (93°F).

Temperature

Sruni signifies an average high-temperature of a still tropical 33.9°C (93°F) in September, closely mirroring the 32.3°C (90.1°F) of August. Sruni observes an average low-temperature of 22.5°C (72.5°F) during September nights.

Heat index

The heat index in September is estimated at a blisteringly hot 43°C (109.4°F). Attention: Heat exhaustion and heat cramps are quite likely. Heatstroke becomes a risk with continued exertion.
It is important to note that the heat index values are for shaded areas and light wind scenarios. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'feels like' or 'real feel', melds the effects of warmth and moisture to generate a feeling of heat. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are of high significance for children. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.
The physiological way the human body responds to excessive heat is by inducing perspiration, using sweat evaporation as a cooling mechanism. 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. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

The months with the lowest humidity are September and October, with an average relative humidity of 62%.

Rainfall

In September, the rain falls for 5.4 days. Throughout September, 11mm (0.43") of precipitation is accumulated. Throughout the year, there are 218.3 rainfall days, and 1409mm (55.47") 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 05:29 and sunset at 17:28. On the last day of September, sunrise is at 05:14 and sunset at 17:24 WIB.

Sunshine

The months with the most sunshine are August through October, with an average of 9.7h of sunshine.

UV index

The months with the highest UV index are February, April through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: A maximum UV index of 7 in September translates into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.

Frequently asked questions

How hot is it in September?
The high-temperature, in September, in Sruni, is 33.9°C (93°F), while the low-temperature averages to 22.5°C (72.5°F). In September, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines air temperature and relative humidity, is estimated at 43°C (109.4°F).
What is the least humid month?
September and October, with an average relative humidity of 62%, are the least humid months.
What is the average humidity in September?
The average relative humidity in September is 62%.
How much does it rain in September?
In Sruni, in September, it is raining for 5.4 days, with typically 11mm (0.43") of accumulated precipitation.
How many hours of daylight does Sruni have in September?
In Sruni, the average day length in September is 12h and 4min.
When are sunrise and sunset in September?
In September, on the first day of the month, sunrise is at 05:29 and sunset at 17:28. On the last day of the month, sunrise is at 05:14 and sunset at 17:24 WIB.
What is the month with the most sunshine?
The months with the most sunshine are August through October, with an average of 9.7h of sunshine.
How long on average sun shines in September in Sruni?
In September, the average sunshine duration is 9.7h.
What are the months with the highest UV index?
The months with the highest UV index in Sruni are February, April through December, with an average maximum UV index of 7.
What is the UV index reading in September?
The average daily maximum UV index in September in Sruni is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability 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
Sruni, Indonesia
  • Average high temperature in September: 33.9°C

The warmest month (with the highest average high temperature) is October (34.6°C).
The month with the lowest average high temperature is February (30.1°C).

  • Average low temperature in September: 22.5°C

The month with the highest average low temperature is November (24.9°C).
The coldest months (with the lowest average low temperature) are July and August (21.8°C).

Average pressure in September
Sruni, Indonesia
  • Average pressure in September: 1011.3mbar

The month with the highest atmospheric pressure is August (1011.4mbar).
The month with the lowest atmospheric pressure is December (1008.7mbar).

Average wind speed in September
Sruni, Indonesia
  • Average wind speed in September: 7.7km/h

The windiest month (with the highest average wind speed) is September (7.7km/h).
The calmest month (with the lowest average wind speed) is April (5.4km/h).

Average humidity in September
Sruni, Indonesia
  • Average humidity in September: 62%

The month with the highest relative humidity is February (84%).
The months with the lowest relative humidity are September and October (62%).

Average rainfall in September
Sruni, Indonesia
  • Average rainfall in September: 11mm

The wettest month (with the highest rainfall) is February (273mm).
The driest month (with the least rainfall) is August (6mm).

Average rainfall days in September
Sruni, Indonesia
  • Average rainfall days in September: 5.4 days

The month with the highest number of rainy days is January (30.1 days).
The month with the least rainy days is August (4 days).

Average daylight in September /
Average sunshine in September
Sruni, 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, September and October (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 7h and 6min).

Average sunshine days in September
Sruni, Indonesia
  • Average sunshine days in September: 23.6 days

The month with the most sunshine days is August (26.5 days).
The month with the least sunshine days is February (0.3 days).

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

The months with the highest UV index are February, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January and March (UV index 6).

Average cloud cover in September
Sruni, Indonesia
  • Average cloud cover in September: 17

The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are August and September (Cloud cover 17).

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

The months with the highest visibility are June, July, August, September, October and November (10km).
The months with the lowest visibility are January, February and March (8km).

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