September weather forecastBeau Vallon, Seychelles

September

Weather in September

September brings slight changes, offering a return to warmer days. Weather conditions begin to shift, with rainfall increasing to 79mm (3.11"), an indication of a transition to the wetter part of the year. While maintaining a high wind speed, it manages to remain slightly cooler than August. The sea temperatures begin to rise slightly, and with the consistent daylight hours, outdoor activities remain a top attraction. September offers a harmonious blend of moderate temperatures, manageable rainfall, and steady sunlight.

Temperature

September's onset records a minor alteration in the average high-temperature to a still moderately hot 26.8°C (80.2°F) from August's 26.4°C (79.5°F). Beau Vallon's average nighttime temperature in September modestly descends to a still moderately hot 26.1°C (79°F).

Humidity

July through September, with an average relative humidity of 80%, are the most humid months.

Rainfall

In Beau Vallon, in September, during 20.5 rainfall days, 79mm (3.11") of precipitation is typically accumulated. In Beau Vallon, during the entire year, the rain falls for 241.9 days and collects up to 1432mm (56.38") of precipitation.

Sea temperature

In September, the average sea temperature is 27°C (80.6°F).
Note: 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.

Daylight

In September, the average length of the day is 12h and 5min.
On the first day of September, sunrise is at 06:17 and sunset at 18:19. On the last day of the month, sunrise is at 06:03 and sunset at 18:12 +04.

Sunshine

September has the least sunshine of the year, with an average of 7h of sunshine.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: A maximum daily UV index of 7 during September morphs into the following directions:
Resist overexposure. Safeguarding from solar damage is indispensable. 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. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Take note! Sand and water reflections strengthen the Sun's UV exposure.

Updated: Jan 25, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The high-temperature during September is 26.8°C (80.2°F) and the low-temperature is 26.1°C (79°F). In June, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which represents the influence of relative humidity on air temperature, is computed to be 31°C (87.8°F).

The months with the highest humidity in Beau Vallon, Seychelles, are July through September, with an average relative humidity of 80%.

The average relative humidity in September in Beau Vallon is 80%.

In September, the rain falls for 20.5 days. Throughout September, 79mm (3.11") of precipitation is accumulated.

In Beau Vallon, in September, the average water temperature is 27°C (80.6°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.

The average day length in September in Beau Vallon, Seychelles, is 12h and 5min.

On the first day of September in Beau Vallon, Seychelles, sunrise is at 06:17 and sunset at 18:19. On the last day of the month, sunrise is at 06:03 and sunset at 18:12 +04.

With an average of 7h of sunshine, September has the least sunshine of the year in Beau Vallon.

The average sunshine duration in September in Beau Vallon, Seychelles, is 7h.

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

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

In September, the average daily maximum UV index is 7. A UV Index estimate of 6 to 7 represents a high hazard to health from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

26.4°C

26.8°C

27.5°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

28.9km/h

26.6km/h

19.5km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

17.8

20.5

18.1

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

5.1

3.8

8.7

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Beau Vallon, Seychelles

Average high temperature in September: 26.8°C

The warmest month (with the highest average high temperature) is April (29.3°C).
The month with the lowest average high temperature is August (26.4°C).

Average low temperature in September: 26.1°C

The month with the highest average low temperature is April (28.1°C).
The coldest months (with the lowest average low temperature) are July and August (25.7°C).

Average pressure in September
Beau Vallon, Seychelles

Average pressure in September: 1012.3mbar

The month with the highest atmospheric pressure is August (1012.4mbar).
The month with the lowest atmospheric pressure is April (1010.4mbar).

Average wind speed in September
Beau Vallon, Seychelles

Average wind speed in September: 26.2km/h

The windiest month (with the highest average wind speed) is August (28.1km/h).
The calmest month (with the lowest average wind speed) is April (12.8km/h).

Average humidity in September
Beau Vallon, Seychelles

Average humidity in September: 80%

The months with the highest relative humidity are July, August and September (80%).
The month with the lowest relative humidity is April (73%).

Average rainfall in September
Beau Vallon, Seychelles

Average rainfall in September: 79mm

The wettest month (with the highest rainfall) is January (220mm).
The driest month (with the least rainfall) is August (50mm).

Average rainfall days in September
Beau Vallon, Seychelles

Average rainfall days in September: 20.5 days

The month with the highest number of rainy days is January (23.2 days).
The month with the least rainy days is November (17.3 days).

Average sea temperature in September
Beau Vallon, Seychelles

Average sea temperature in September: 27°C

The best month for swimming (with the highest average sea temperature) is April (30°C).
The coldest months (with the lowest average sea temperature) are July and August (26°C).

Average daylight in September /
Average sunshine in September
Beau Vallon, Seychelles

Average daylight in September: 12h and 6min

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

Average sunshine in September: 7h and 0min

The month with the most sunshine is November (Average sunshine: 10h and 6min).
The month with the least sunshine is September (Average sunshine: 7h and 0min).

Average sunshine days in September
Beau Vallon, Seychelles

Average sunshine days in September: 3.8 days

The month with the most sunshine days is November (10.9 days).
The month with the least sunshine days is June (3 days).

Average UV index in September
Beau Vallon, Seychelles

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
Beau Vallon, Seychelles

Average cloud cover in September: 51

The month with the most cloud cover is September (Cloud cover 51).
The month with the least cloud cover is November (Cloud cover 41).

Average visibility in September
Beau Vallon, Seychelles

Average visibility in September: 10km

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