Apia
Samoa
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Apia, Samoa

The view of the large Methodist church in the town of Apia, Samoa
The view of the large Methodist church in the town of Apia, Samoa
September, the first month of the spring, in Apia, is also a moderately hot month, with average temperature fluctuating between 27.3°C (81.1°F) and 26.3°C (79.3°F).

Temperature

With an average high-temperature of 27.3°C (81.1°F) and an average low-temperature of 26.3°C (79.3°F), September is the coldest month.

Heat index

In September, the average heat index is evaluated at a tropical 30.2°C (86.4°F). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'apparent temperature', 'felt air temperature', or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like pregnancy, wind, differences in body mass, height, and shape, and activity influence one's weather impression. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. 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.

Humidity

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

Rainfall

September is the month with the least rainfall in Apia. Rain falls for 18.7 days and accumulates 57mm (2.24") of precipitation.

Sea temperature

Months with the coldest seawater in Apia, Samoa, are August and September, with an average sea temperature of 27.9°C (82.2°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 Apia is 12h.

Sunshine

The average sunshine in Apia, Samoa, is 7.8h.

UV index

Months with the highest UV index in Apia are January through December, with an average maximum UV index of 7. January through December, with an average maximum UV index of 7, are months with the lowest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 7 interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What is the coldest month in Apia?

September is the coldest month, with an average high-temperature of 27.3°C (81.1°F) and an average low-temperature of 26.3°C (79.3°F).

What is the temperature in September in Apia?

In Apia, Samoa, in September, the average high-temperature is 27.3°C (81.1°F), and the average low-temperature is 26.3°C (79.3°F). The average heat index (a.k.a. 'feels like', 'apparent temperature'), that combines both air temperature and relative humidity, in September is calculated to 30.2°C (86.4°F).

What are the most humid months in Apia?

Months with the highest humidity are June through September, with an average relative humidity of 78%.

What is the average humidity in September in Apia?

The average relative humidity in September in Apia, Samoa, is 78%.

How many days does it rain in September in Apia?

In September, in Apia, the rain falls for 18.7 days. Throughout September, 57mm (2.24") of precipitation is accumulated.

What is the driest month in Apia?

The month with the least rainfall in Apia is September when the rain falls for 18.7 days and typically collects 57mm (2.24") of precipitation.

What months are the sea coldest in Apia?

August and September, with an average sea temperature of 27.9°C (82.2°F), are months with the coldest seawater in Apia, Samoa.

How warm is the water in September in Apia?

In Apia, the average seawater temperature in September is 27.9°C (82.2°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.

How many hours of daylight does Apia have in September?

In Apia, Samoa, the average length of the day in September is 12h.

How long on average sun shines in September in Apia?

The average sunshine in September in Apia is 7.8h.

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

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

What is the month with the lowest UV index in Apia?

Months with the lowest UV index in Apia, Samoa, are January through December, with an average maximum UV index of 7.

What is the UV index intensity in September in Apia?

The average daily maximum UV index in September in Apia, Samoa, is 7. A UV Index of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV rays.
Average temperature in September - Apia, Samoa
  • Average high temperature in September: 27.3°C

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: 26.3°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 humidity in September - Apia, Samoa
  • Average humidity in September: 78%

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 - Apia, Samoa
  • Average rainfall in September: 57mm

The wettest month (with the highest rainfall) is January (175mm).
The driest month (with the lowest rainfall) is September (57mm).

Average rainfall days in September - Apia, Samoa
  • Average rainfall days in September: 18.7 days

The month with the highest number of rainy days is April (22.7 days).
The month with the lowest number of rainy days is September (18.7 days).

Average sea temperature in September - Apia, Samoa
  • Average sea temperature in September: 27.9°C

The best month for swimming (with the highest average sea temperature) is March (29.7°C).
Coldest months (with the lowest average sea temperature) are August and September (27.9°C).

Average daylight in September / Average sunshine in September - Apia, Samoa
  • Average daylight in September: 12h

The month with the longest days is December (Average daylight: 12.9h).
The month with shortest days is June (Average daylight: 11.3h).

  • Average sunshine in September: 7.8h

The month with most sunshine is March (Average sunshine: 8.7h).
The month with least sunshine is July (Average sunshine: 7.3h).

Average UV index in September - Apia, Samoa
  • Average UV index in September: 7

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