September weather forecast and climate
Macau, China

The Grand Lisboa and the general skyline of Macau, China at dusk
The Grand Lisboa and the general skyline of Macau, China at dusk

Weather in September

The first month of the autumn, September, is also a hot month in Macau, China, with average temperature varying between 25.1°C (77.2°F) and 30.4°C (86.7°F).

Temperature

In Macau, the average high-temperature is essentially the same as in August - a still tropical 30.4°C (86.7°F). In Macau, China,, the average low-temperature is 25.1°C (77.2°F).

Heat index

The average heat index is evaluated at a torrid 38.3°C (100.9°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'apparent temperature', 'feels like', or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional factors like pregnancy, clothing, metabolic differences, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In September, the average relative humidity is 77.9%.

Rainfall

In Macau, during September, the rain falls for 12.3 days and regularly aggregates up to 219.5mm (8.64") of precipitation. Throughout the year, there are 130.2 rainfall days, and 2058.3mm (81.04") of precipitation is accumulated.

Sea temperature

In September, the average sea temperature is 28.3°C (82.9°F).
Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

The average length of the day in September is 12.3h.

Sunshine

The average sunshine is 5.9h.

UV index

In Macau, the average daily maximum UV index in September is 11. A UV Index of 11, and more, symbolizes an excessive health risk from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 11 interpret into the following advice:
Take all necessary precautions, as unprotected skin can burn in minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

What is the temperature in September in Macau?

In September, in Macau, China, the average high-temperature is 30.4°C (86.7°F), and the average low-temperature is 25.1°C (77.2°F). In September, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, is evaluated at 38.3°C (100.9°F).

What is the average humidity in September in Macau?

In Macau, the average relative humidity in September is 77.9%.

How many days does it rain in September in Macau?

In Macau, China, in September, it is raining for 12.3 days, with typically 219.5mm (8.64") of accumulated precipitation.

How warm is the water in September in Macau?

In Macau, China, the average seawater temperature in September is 28.3°C (82.9°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

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

In September, the average length of the day is 12.3h.

How many hours of sunshine does Macau have in September?

In Macau, the average sunshine in September is 5.9h.

What is the UV index reading in September in Macau?

In September, the average daily maximum UV index in Macau is 11. A UV Index reading of 11, and higher, represents an extreme health threat from unsafe exposure to the Sun's UV rays.

Average temperature in September
Macau, China

Average temperature in September - Macau, China
  • Average high temperature in September: 30.4°C

The warmest month (with the highest average high temperature) is July (31.6°C).
The month with the lowest average high temperature is January (18.2°C).

  • Average low temperature in September: 25.1°C

The month with the highest average low temperature is July (26.2°C).
The coldest month (with the lowest average low temperature) is January (12.5°C).

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Average humidity in September
Macau, China

Average humidity in September - Macau, China
  • Average humidity in September: 77.9%

The month with the highest relative humidity is April (86.1%).
The month with the lowest relative humidity is December (68.5%).

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Average rainfall in September
Macau, China

Average rainfall in September - Macau, China
  • Average rainfall in September: 219.5mm

The wettest month (with the highest rainfall) is June (363.8mm).
The driest month (with the least rainfall) is January (26.5mm).

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Average rainfall days in September
Macau, China

Average rainfall days in September - Macau, China
  • Average rainfall days in September: 12.3 days

The month with the highest number of rainy days is June (17.7 days).
The month with the least rainy days is December (4.5 days).

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Average sea temperature in September
Macau, China

Average sea temperature in September - Macau, China
  • Average sea temperature in September: 28.3°C

The best month for swimming (with the highest average sea temperature) is July (29.3°C).
The coldest month (with the lowest average sea temperature) is February (18.6°C).

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Average daylight in September /
Average sunshine in September
Macau, China

Average daylight in September / Average sunshine in September - Macau, China
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 13.5h).
The month with the shortest days is December (Average daylight: 10.8h).

  • Average sunshine in September: 5.9h

The month with the most sunshine is July (Average sunshine: 7.2h).
The month with the least sunshine is March (Average sunshine: 2.3h).

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Average UV index in September
Macau, China

Average UV index in September - Macau, China
  • Average UV index in September: 11

Months with the highest UV index are April, May, June, July and August (UV index 12).
Months with the lowest UV index are January, November and December (UV index 7).

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