September weather forecast
Miri, Malaysia

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Weather in September

September sustains the Miri, Malaysia weather trend set in August, emphasizing climate stability. However, the late afternoons and evenings witness a rise in rainfall from the drip in August. Cloud coverage displays a slight increase, contributing to the small rise in rainfall. As the city approaches the last quarter, wind speed raises gradually. The changes are subtle, and the residents adjust with ease.

Temperature

The average high-temperature in Miri during September is a still tropical 31.3°C (88.3°F), showing a negligible deviation from August. September in Miri, Malaysia, sees the temperature falling to a mean low of 25.5°C (77.9°F).

Heat index

For September, the heat index is computed to be an extremely hot 40°C (104°F). Take more preventive steps, risk of heat exhaustion and heat cramps is elevated. Long activity may culminate in heatstroke.
The metrics for the heat index are tailored for both shady environments and light winds. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'feels like' or 'real feel', gives a temperature feeling by integrating air temperature and humidity. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

In September, the average relative humidity is 76%.

Rainfall

The month with the least rainfall is September, when the rain falls for 22.5 days and typically collects 79mm (3.11") of precipitation.

Sea temperature

In Miri, in September, the average water temperature is 29.7°C (85.5°F).
Note: 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.

Daylight

In Miri, the average length of the day in September is 12h and 8min.
On the first day of the month, sunrise is at 6:18 am and sunset at 6:29 pm. On the last day of September, in Miri, sunrise is at 6:11 am and sunset at 6:16 pm +08.

Sunshine

September has the most sunshine of the year in Miri, with an average of 9h of sunshine.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. January through December, with an average maximum UV index of 7, are months with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: The maximum UV index of 7 during September translates into these guidelines:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Take heed! Reflections of sand and water make the Sun's UV rays stronger.
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Frequently asked questions

How hot is it in Miri in September?

The average high-temperature and low-temperature during September are 31.3°C (88.3°F) and 25.5°C (77.9°F) respectively. In September, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines relative humidity and air temperature, is computed to be 40°C (104°F).

What is the average humidity in September in Miri?

The average relative humidity in September in Miri, Malaysia, is 76%.

What is the driest month in Miri?

September is the month with the least rainfall in Miri. Rain falls for 22.5 days and accumulates 79mm (3.11") of precipitation.

How much does it rain in Miri in September?

In Miri, in September, during 22.5 rainfall days, 79mm (3.11") of precipitation is typically accumulated.

What is the water temperature in September in Miri?

In Miri, in September, the average water temperature is 29.7°C (85.5°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

What is the average length of the day in September in Miri?

The average day length in September in Miri is 12h and 8min.

When are sunrise and sunset in September in Miri?

On the first day of September, sunrise is at 6:18 am and sunset at 6:29 pm. On the last day of the month, sunrise is at 6:11 am and sunset at 6:16 pm +08.

What month has the most sunshine in Miri?

With an average of 9h of sunshine, September has the most sunshine of the year in Miri, Malaysia.

How many hours of sunshine does Miri have in September?

In September, the average sunshine duration in Miri is 9h.

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

The months with the highest UV index in Miri, Malaysia, are January through December, with an average maximum UV index of 7.

When is the lowest UV index in Miri?

January through December, with an average maximum UV index of 7, are months with the lowest UV index.

What is the UV index reading in September in Miri?

In Miri, Malaysia, the average daily maximum UV index in September is 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation.

Average temperature in September
Miri, Malaysia

Average temperature in September - Miri, Malaysia
  • Average high temperature in September: 31.3°C

The warmest month (with the highest average high temperature) is May (31.7°C).
The month with the lowest average high temperature is February (29.4°C).

  • Average low temperature in September: 25.5°C

The month with the highest average low temperature is May (25.7°C).
The coldest month (with the lowest average low temperature) is February (24.6°C).

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Average pressure in September
Miri, Malaysia

Average pressure in September - Miri, Malaysia
  • Average pressure in September: 1009.9mbar

The months with the highest atmospheric pressure are February and March (1010.1mbar).
The months with the lowest atmospheric pressure are November and December (1008.9mbar).

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Average wind speed in September
Miri, Malaysia

Average wind speed in September - Miri, Malaysia
  • Average wind speed in September: 8.7km/h

The windiest month (with the highest average wind speed) is February (10.2km/h).
The calmest month (with the lowest average wind speed) is May (7.4km/h).

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Average humidity in September
Miri, Malaysia

Average humidity in September - Miri, Malaysia
  • Average humidity in September: 76%

The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is August (75%).

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Average rainfall in September
Miri, Malaysia

Average rainfall in September - Miri, Malaysia
  • Average rainfall in September: 79mm

The wettest month (with the highest rainfall) is December (214mm).
The driest month (with the least rainfall) is September (79mm).

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Average rainfall days in September
Miri, Malaysia

Average rainfall days in September - Miri, Malaysia
  • Average rainfall days in September: 22.5 days

The month with the highest number of rainy days is December (27.3 days).
The month with the least rainy days is June (20.4 days).

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Average sea temperature in September
Miri, Malaysia

Average sea temperature in September - Miri, Malaysia
  • Average sea temperature in September: 29.7°C

The best months for swimming (with the highest average sea temperature) are June and July (30.3°C).
The coldest month (with the lowest average sea temperature) is February (27.1°C).

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Average daylight in September /
Average sunshine in September
Miri, Malaysia

Average daylight in September / Average sunshine in September - Miri, Malaysia
  • Average daylight in September: 12h and 1min

The month with the longest days is June (Average daylight: 12h and 24min).
The month with the shortest days is December (Average daylight: 11h and 54min).

  • Average sunshine in September: 9h and 0min

The month with the most sunshine is September (Average sunshine: 9h and 0min).
The month with the least sunshine is January (Average sunshine: 7h and 36min).

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Average sunshine days in September
Miri, Malaysia

Average sunshine days in September - Miri, Malaysia
  • Average sunshine days in September: 6.2 days

The month with the most sunshine days is August (8.3 days).
The month with the least sunshine days is December (2.9 days).

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Average UV index in September
Miri, Malaysia

Average UV index in September - Miri, Malaysia
  • 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).

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Average cloud cover in September
Miri, Malaysia

Average cloud cover in September - Miri, Malaysia
  • Average cloud cover in September: 36

The month with the most cloud cover is January (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 35).

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Average visibility in September
Miri, Malaysia

Average visibility in September - Miri, Malaysia
  • Average visibility in September: 10km

The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (10km).
The months with the lowest visibility are January and December (9km).

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Miri, Malaysia

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