September weather forecast
Mulinu'u, Samoa

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Weather in September

September heralds an increase in maximum temperatures, rising back to above 27°C (80.6°F). The rainfall remains on the lower end, totalling 96mm (3.78"), hinting at the retreat of the wetter seasons. The wind speed decreases slightly, allowing for calmer days and more relaxed outdoor experiences. The tropical atmosphere of Mulinu'u remains prominent, offering diverse activities under the Samoan sun.

Temperature

Mulinu'u's September weather, marked by an average high temperature of 27.3°C (81.1°F) and an average low temperature of 26.1°C (79°F), is the coldest in the year.

Heat index

Throughout September, the heat index is calculated to be a tropical 30°C (86°F). Exposure and extended activity could potentially cause a state of fatigue and lead to heat cramps.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', takes into account both air temperature and humidity to illustrate what people actually feel. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.

Humidity

June through September, with an average relative humidity of 78%, are the most humid months in Mulinu'u.

Rainfall

In September, in Mulinu'u, the rain falls for 19.7 days. Throughout September, 96mm (3.78") of precipitation is accumulated. Throughout the year, in Mulinu'u, Samoa, there are 247.7 rainfall days, and 1482mm (58.35") of precipitation is accumulated.

Daylight

The average length of the day in September is 12h and 2min.
On the first day of the month, sunrise is at 06:31 and sunset at 18:22. On the last day of September, in Mulinu'u, sunrise is at 06:10 and sunset at 18:23 +13.

Sunshine

In Mulinu'u, the average sunshine in September is 7.5h.

UV index

The months with the highest UV index in Mulinu'u, Samoa, are January through December, with an average maximum UV index of 7. The months with the lowest UV index in Mulinu'u are January 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 rays for ordinary individuals.
Note: An average UV index of 7 in September transforms into this advice:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Updated: Feb 15, 2024 | Published by: Weather Atlas | About Us / Weather Forecasting / Data Sources

Frequently asked questions

What is the coldest month in Mulinu'u?

September is the month when Mulinu'u, Samoa, experiences its coldest temperatures, averaging a high of 27.3°C (81.1°F) and a low of 26.1°C (79°F).

What is the average September temperature in Mulinu'u?

The high-temperature, in September, in Mulinu'u, records 27.3°C (81.1°F), while the low-temperature is 26.1°C (79°F). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which represents the influence of relative humidity on air temperature, in September is calculated to be 30°C (86°F).

What is the most humid month in Mulinu'u?

June through September, with an average relative humidity of 78%, are most humid months.

What is the average humidity in September in Mulinu'u?

In Mulinu'u, the average relative humidity in September is 78%.

How many days does it rain in September in Mulinu'u?

In September, in Mulinu'u, the rain falls for 19.7 days. Throughout September, 96mm (3.78") of precipitation is accumulated.

What is the average length of the day in September in Mulinu'u?

In September, the average day length in Mulinu'u, Samoa, is 12h and 2min.

When is the sunrise / sunset in September in Mulinu'u?

On the first day of September in Mulinu'u, sunrise is at 06:31 and sunset at 18:22. On the last day of the month, sunrise is at 06:10 and sunset at 18:23 +13.

How long on average sun shines in September in Mulinu'u?

The average sunshine duration in September is 7.5h.

What is the month with the highest UV index in Mulinu'u?

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

When is the lowest UV index in Mulinu'u?

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

How high is the UV index in September in Mulinu'u?

The average daily maximum UV index in September in Mulinu'u, Samoa, is 7. A UV Index of 6 to 7 symbolizes a high health threat from unsafe exposure to Sun's UV rays.

Average temperature in September
Mulinu'u, Samoa

Average temperature in September - Mulinu
  • Average high temperature in September: 27.3°C

The warmest months (with the highest average high temperature) are March and April (28.7°C).
The month with the lowest average high temperature is September (27.3°C).

  • Average low temperature in September: 26.1°C

The month with the highest average low temperature is January (27.6°C).
The coldest month (with the lowest average low temperature) is August (26°C).

Average pressure in September
Mulinu'u, Samoa

Average pressure in September - Mulinu
  • Average pressure in September: 1012.3mbar

The month with the highest atmospheric pressure is September (1012.3mbar).
The month with the lowest atmospheric pressure is January (1007.5mbar).

Average wind speed in September
Mulinu'u, Samoa

Average wind speed in September - Mulinu
  • Average wind speed in September: 23.4km/h

The windiest month (with the highest average wind speed) is July (24.7km/h).
The calmest month (with the lowest average wind speed) is March (14.8km/h).

Average humidity in September
Mulinu'u, Samoa

Average humidity in September - Mulinu
  • Average humidity in September: 78%

The months with the highest relative humidity are June, July, August and September (78%).
The month with the lowest relative humidity is March (75%).

Average rainfall in September
Mulinu'u, Samoa

Average rainfall in September - Mulinu
  • Average rainfall in September: 96mm

The wettest month (with the highest rainfall) is January (175mm).
The driest month (with the least rainfall) is March (73mm).

Average rainfall days in September
Mulinu'u, Samoa

Average rainfall days in September - Mulinu
  • Average rainfall days in September: 19.7 days

The month with the highest number of rainy days is April (22.7 days).
The months with the least rainy days are February and November (18.8 days).

Average daylight in September /
Average sunshine in September
Mulinu'u, Samoa

Average daylight in September / Average sunshine in September - Mulinu
  • Average daylight in September: 12h and 0min

The month with the longest days is December (Average daylight: 12h and 54min).
The month with the shortest days is June (Average daylight: 11h and 18min).

  • Average sunshine in September: 7h and 3min

The month with the most sunshine is March (Average sunshine: 8h and 42min).
The month with the least sunshine is July (Average sunshine: 7h and 18min).

Average sunshine days in September
Mulinu'u, Samoa

Average sunshine days in September - Mulinu
  • Average sunshine days in September: 3.3 days

The month with the most sunshine days is December (10.4 days).
The month with the least sunshine days is June (2.7 days).

Average UV index in September
Mulinu'u, Samoa

Average UV index in September - Mulinu
  • 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
Mulinu'u, Samoa

Average cloud cover in September - Mulinu
  • Average cloud cover in September: 47

The month with the most cloud cover is July (Cloud cover 49).
The month with the least cloud cover is March (Cloud cover 38).

Average visibility in September
Mulinu'u, Samoa

Average visibility in September - Mulinu
  • 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).

Mulinu'u, Samoa

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