September weather forecast
Mataram, Indonesia

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Weather in September

An increase in rainfall to 21mm (0.83") signals the arrival of wetter days in September. Despite the introduction of more rain, temperatures remain nearly unchanged providing steady weather. Outdoor activities continue to thrive with warm day temperatures and moderate wind speeds. September marks an uptick in humidity, matching the moistness introduced by the expanded rains. The weather nonetheless remains inviting for adventurous exploitation of terrain and sea.

Temperature

In September, Mataram notes an average high-temperature of a still warm 27.6°C (81.7°F), hardly different from the preceding month. Mataram sees a gentle drop from the daily peak temperature in September, with an average low settling at a still warm 23.6°C (74.5°F).

Heat index

During September, the heat index is appraised at a tropical 31°C (87.8°F). With constant exposure and activity, a state of weariness might ensue, leading to potential heat cramps.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', blends air temperature and moisture content to represent the felt temperature to humans. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.

Humidity

The months with the highest humidity are January through March, May through July, September and December, with an average relative humidity of 79%.

Rainfall

In Mataram, in September, it is raining for 11.5 days, with typically 21mm (0.83") of accumulated precipitation. Throughout the year, there are 231.2 rainfall days, and 1002mm (39.45") of precipitation is accumulated.

Sea temperature

In Mataram, in September, the average water temperature is 26.8°C (80.2°F).
Note: Swimming, diving, and other activities in water temperatures between 25°C (77°F) and 29°C (84.2°F) are thought to be quite enjoyable and satisfying for extended periods, with no discomfort.

Daylight

The average length of the day in September is 12h and 4min.
On the first day of the month, sunrise is at 06:17 and sunset at 18:14. On the last day of September, sunrise is at 06:00 and sunset at 18:10 WITA.

Sunshine

The average sunshine in September in Mataram, Indonesia, is 9.6h.

UV index

The months with the highest UV index in Mataram are January through May, July through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the average person.
Note: An average UV index of 7 in September transforms into this advice:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be vigilant! The Sun's UV rays get a boost from sand and water reflections.
Updated: Jan 25, 2024 | Published by: Weather Atlas | Resources

Frequently asked questions

What are the temperatures in Mataram in September?

In September, in Mataram, the average high-temperature is 27.6°C (81.7°F), and the average low-temperature is 23.6°C (74.5°F). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, in September is appraised at 31°C (87.8°F).

What are the most humid months in Mataram?

January through March, May through July, September and December, with an average relative humidity of 79%, are most humid months in Mataram.

What is the average humidity in September in Mataram?

In Mataram, the average relative humidity in September is 79%.

How many days does it rain in September in Mataram?

In Mataram, in September, during 11.5 rainfall days, 21mm (0.83") of precipitation is typically accumulated.

What is the water temperature in September in Mataram?

In Mataram, Indonesia, the average seawater temperature in September is 26.8°C (80.2°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

How many hours of daylight does Mataram have in September?

In Mataram, Indonesia, the average day length in September is 12h and 4min.

What time are sunrise and sunset in September in Mataram?

On the first day of September in Mataram, sunrise is at 06:17 and sunset at 18:14. On the last day of the month, sunrise is at 06:00 and sunset at 18:10 WITA.

How many hours of sunshine does Mataram have in September?

In September, the average sunshine duration is 9.6h.

What are the months with the highest UV index in Mataram?

The months with the highest UV index in Mataram are January through May, July through December, with an average maximum UV index of 7.

What is the UV index intensity in September in Mataram?

The average daily maximum UV index in September in Mataram, Indonesia, is 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to UV radiation.

Average temperature in September
Mataram, Indonesia

Average temperature in September - Mataram, Indonesia
  • Average high temperature in September: 27.6°C

The warmest month (with the highest average high temperature) is November (29°C).
The months with the lowest average high temperature are July and August (27.3°C).

  • Average low temperature in September: 23.6°C

The month with the highest average low temperature is December (26.1°C).
The coldest month (with the lowest average low temperature) is August (23.2°C).

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Average pressure in September
Mataram, Indonesia

Average pressure in September - Mataram, Indonesia
  • Average pressure in September: 1011.7mbar

The month with the highest atmospheric pressure is August (1011.9mbar).
The month with the lowest atmospheric pressure is December (1008.3mbar).

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Average wind speed in September
Mataram, Indonesia

Average wind speed in September - Mataram, Indonesia
  • Average wind speed in September: 12.8km/h

The windiest month (with the highest average wind speed) is July (13.3km/h).
The calmest month (with the lowest average wind speed) is April (7.6km/h).

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Average humidity in September
Mataram, Indonesia

Average humidity in September - Mataram, Indonesia
  • Average humidity in September: 79%

The months with the highest relative humidity are January, February, March, May, June, July, September and December (79%).
The month with the lowest relative humidity is October (77%).

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Average rainfall in September
Mataram, Indonesia

Average rainfall in September - Mataram, Indonesia
  • Average rainfall in September: 21mm

The wettest month (with the highest rainfall) is December (165mm).
The driest month (with the least rainfall) is August (10mm).

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Average rainfall days in September
Mataram, Indonesia

Average rainfall days in September - Mataram, Indonesia
  • Average rainfall days in September: 11.5 days

The month with the highest number of rainy days is January (27.1 days).
The month with the least rainy days is August (10.3 days).

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Average sea temperature in September
Mataram, Indonesia

Average sea temperature in September - Mataram, Indonesia
  • Average sea temperature in September: 26.8°C

The best month for swimming (with the highest average sea temperature) is December (29.6°C).
The coldest month (with the lowest average sea temperature) is August (26.6°C).

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Average daylight in September /
Average sunshine in September
Mataram, Indonesia

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

The month with the longest days is December (Average daylight: 12h and 36min).
The month with the shortest days is June (Average daylight: 11h and 36min).

  • Average sunshine in September: 9h and 4min

The month with the most sunshine is October (Average sunshine: 11h and 36min).
The month with the least sunshine is January (Average sunshine: 7h and 54min).

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Average sunshine days in September
Mataram, Indonesia

Average sunshine days in September - Mataram, Indonesia
  • Average sunshine days in September: 14.2 days

The month with the most sunshine days is August (16.1 days).
The month with the least sunshine days is January (2.9 days).

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Average UV index in September
Mataram, Indonesia

Average UV index in September - Mataram, Indonesia
  • Average UV index in September: 7

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

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Average cloud cover in September
Mataram, Indonesia

Average cloud cover in September - Mataram, Indonesia
  • Average cloud cover in September: 22

The month with the most cloud cover is January (Cloud cover 44).
The months with the least cloud cover are August and September (Cloud cover 22).

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Average visibility in September
Mataram, Indonesia

Average visibility in September - Mataram, 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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Mataram, Indonesia

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