September weather forecast and climate
Port-aux-Français, French Southern and Antarctic Lands

The first month of the spring, September, is also a wintry month in Port-aux-Français, French Southern and Antarctic Lands, with temperature in the range of an average low of -0.7°C (30.7°F) and an average high of 5.3°C (41.5°F).

Temperature

In September, the average high-temperature is essentially the same as in August - a still cold 5.3°C (41.5°F). In September, in Port-aux-Français, the average low-temperature is -0.7°C (30.7°F).

Rainfall

In Port-aux-Français, French Southern and Antarctic Lands, during 12 rainfall days, 65.3mm (2.57") of precipitation is typically accumulated. Throughout the year, in Port-aux-Français, French Southern and Antarctic Lands, there are 169 rainfall days, and 707.9mm (27.87") of precipitation is accumulated.

Snowfall

January, March through December are months with snowfall in Port-aux-Français, French Southern and Antarctic Lands. In Port-aux-Français, during September, snow falls for 12 days. In Port-aux-Français, during the entire year, snow falls for 79 days.

Sea temperature

July through October, with an average sea temperature of 2°C (35.6°F), are months with the coldest seawater.
Note: For swimming, this is considered life-threatening and very dangerous. The water feels painfully cold, and hyperventilation quickly occurs. A specialized swimsuit is mandatory to reduce thermal damage.

Daylight

In Port-aux-Français, the average length of the day is 11.8h.

Sunshine

In September, the average sunshine in Port-aux-Français is 4.2h.

UV index

In Port-aux-Français, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a low threat to health from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, the average maximum UV index of 2 translate into the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in September in Port-aux-Français?

The average high-temperature, in September, in Port-aux-Français, is 5.3°C (41.5°F), while the average low-temperature is -0.7°C (30.7°F).

How much does it rain in Port-aux-Français in September?

In Port-aux-Français, in September, during 12 rainfall days, 65.3mm (2.57") of precipitation is typically accumulated.

How many days does it snow in September in Port-aux-Français?

In Port-aux-Français, French Southern and Antarctic Lands, during September, snow falls for 12 days.

What months are the sea coldest in Port-aux-Français?

July through October, with an average sea temperature of 2°C (35.6°F), are months with the coldest seawater in Port-aux-Français.

What is the sea temperature in September in Port-aux-Français?

In Port-aux-Français, the average seawater temperature in September is 2°C (35.6°F). For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

How many hours of daylight does Port-aux-Français have in September?

In September, the average length of the day is 11.8h.

How many hours of sunshine does Port-aux-Français have in September?

In Port-aux-Français, the average sunshine in September is 4.2h.

How high is the UV index in September in Port-aux-Français?

In Port-aux-Français, the average daily maximum UV index in September is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in September - Port-aux-Français, French Southern and Antarctic Lands
  • Average high temperature in September: 5.3°C

The warmest month (with the highest average high temperature) is February (11.5°C).
The month with the lowest average high temperature is July (4.8°C).

  • Average low temperature in September: -0.7°C

The month with the highest average low temperature is February (4.3°C).
The coldest months (with the lowest average low temperature) are July and August (-0.8°C).

Average rainfall in September - Port-aux-Français, French Southern and Antarctic Lands
  • Average rainfall in September: 65.3mm

The wettest month (with the highest rainfall) is May (69mm).
The driest month (with the least rainfall) is February (45.5mm).

Average rainfall days in September - Port-aux-Français, French Southern and Antarctic Lands
  • Average rainfall days in September: 12 days

Months with the highest number of rainy days are January, March, April and December (16 days).
The month with the least rainy days is September (12 days).

Average snowfall days in September - Port-aux-Français, French Southern and Antarctic Lands
  • Average snowfall days in September: 12 days

The month with the highest number of snowfall days is August (13 days).
The month with the least snowfall days is February (0 days).

Average sea temperature in September - Port-aux-Français, French Southern and Antarctic Lands
  • Average sea temperature in September: 2°C

The best months for swimming (with the highest average sea temperature) are February and March (5°C).
The coldest months (with the lowest average sea temperature) are July, August, September and October (2°C).

Average daylight in September / Average sunshine in September - Port-aux-Français, French Southern and Antarctic Lands
  • Average daylight in September: 11.8h

The month with the longest days is December (Average daylight: 16.2h).
The month with the shortest days is June (Average daylight: 8.3h).

  • Average sunshine in September: 4.2h

The month with the most sunshine is January (Average sunshine: 6.1h).
The month with the least sunshine is June (Average sunshine: 2.4h).

Average UV index in September - Port-aux-Français, French Southern and Antarctic Lands
  • Average UV index in September: 2

Months with the highest UV index are January and December (UV index 8).
Months with the lowest UV index are May, June, July and August (UV index 1).