September weather - Spring 2024 - Diego Garcia, British Indian Ocean Territory

Weather in September
Frequently asked questions
Average temperature in September
Average rainfall in September
Average rainfall days in September
Average sea temperature in September
Average daylight in September
Average sunshine in September
Average UV index in September

Palm trees bent towards the ocean in a lagoon beach in Diego Garcia, within British Indian Ocean Territory

Weather in September

September sees another reduce in rainfall to 260mm (10.24"), while temperatures, daylight hours, and the UV index continue the August pattern. Diego Garcia preserves its tropical character, blending rain-soaked days with a consistent sunshine provision of 6.7 hours. The occurrence of more rain-filled days coupled with steady sunlight hours underscores September as a month of mild climatic transition.

Temperature

Lowest temperatures are observed in March through November, averaging a high-temperature of 30°C (86°F).

Rainfall

In Diego Garcia, in September, during 15 rainfall days, 260mm (10.24") of precipitation is typically accumulated. In Diego Garcia, during the entire year, the rain falls for 123 days and collects up to 2213mm (87.13") of precipitation.

Sea temperature

June through September, with an average sea temperature of 27°C (80.6°F), are months with the coldest seawater in Diego Garcia.
Note: For any water activity, temperatures between 25°C (77°F) and 29°C (84.2°F) are deemed excellent and extremely satisfying for enduring periods.

Daylight

The average length of the day in September in Diego Garcia is 12h and 4min.
On the first day of the month, sunrise is at 07:10 and sunset at 19:09. On the last day of September, in Diego Garcia, sunrise is at 06:55 and sunset at 19:05 +06.

Sunshine

June and September, with an average of 6.7h of sunshine, are months with the least sunshine.

UV index

January through April, August through December, with an average maximum UV index of 12, are months with the highest UV index in Diego Garcia. A UV Index value of 11, and more, symbolizes an excessive health risk from unsafe exposure to UV radiation for the average person.
Note: The maximum UV index, 12 during September, leads to the following recommendations:
Put into effect every essential safeguard, as unprotected skin and eyes might burn instantly. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Use liberally and reapply a broad-spectrum SPF 30+ sunscreen every two hours, or straight away after any outdoor workout or swim. Take note! The UV strength of the Sun elevates when reflected off water and sand.

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Frequently asked questions

What is the coldest time of year in Diego Garcia?

In Diego Garcia, British Indian Ocean Territory, March through November are characterised by the lowest temperatures, recording an average high of 30°C (86°F).

How hot is it in Diego Garcia in September?

In September, the average high-temperature and low-temperature are 30°C (86°F) and 27°C (80.6°F) respectively.

How much does it rain in Diego Garcia in September?

In Diego Garcia, British Indian Ocean Territory, during September, the rain falls for 15 days and regularly aggregates up to 260mm (10.24") of precipitation.

What are the months with the coldest sea water in Diego Garcia?

June through September, with an average sea temperature of 27°C (80.6°F), are months with the coldest seawater.

What is the sea water temperature in September in Diego Garcia?

In Diego Garcia, the average seawater temperature in September is 27°C (80.6°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

What is the average length of the day in September in Diego Garcia?

In Diego Garcia, the average day length in September is 12h and 4min.

When are sunrise and sunset in September in Diego Garcia?

On the first day of September in Diego Garcia, British Indian Ocean Territory, sunrise is at 07:10 and sunset at 19:09. On the last day of the month, sunrise is at 06:55 and sunset at 19:05 +06.

What are the months with the least sunshine in Diego Garcia?

June and September, with an average of 6.7h of sunshine, are months with the least sunshine in Diego Garcia.

How many hours of sunshine does Diego Garcia have in September?

The average sunshine duration in September in Diego Garcia, British Indian Ocean Territory, is 6.7h.

What are the months with the highest UV index in Diego Garcia?

The months with the highest UV index in Diego Garcia, British Indian Ocean Territory, are January through April, August through December, with an average maximum UV index of 12.

What is the UV index intensity in September in Diego Garcia?

In Diego Garcia, British Indian Ocean Territory, the average daily maximum UV index in September is 12. A UV Index value of 11, and more, symbolizes an excessive health risk from unsafe exposure to Sun's UV rays.

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Average high temperature

30°C 86°F

Average low temperature

Average rainfall

Average rainfall days

Average sea temperature

Average daylight

Average sunshine

Average UV index

Average temperature in September
Diego Garcia, British Indian Ocean Territory

Average high temperature in September: 30°C

The warmest months (with the highest average high temperature) are January, February and December (31°C).
The months with the lowest average high temperature are March, April, May, June, July, August, September, October and November (30°C).

Average low temperature in September: 27°C

The months with the highest average low temperature are January, March, April, May, August, September, October and December (27°C).
The coldest months (with the lowest average low temperature) are February, June, July and November (26°C).

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Average rainfall in September
Diego Garcia, British Indian Ocean Territory

Average rainfall in September: 260mm

The wettest month (with the highest rainfall) is August (298mm).
The driest month (with the least rainfall) is February (18mm).

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Average rainfall days in September
Diego Garcia, British Indian Ocean Territory

Average rainfall days in September: 15 days

The month with the highest number of rainy days is June (17 days).
The months with the least rainy days are February and March (1 days).

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Average sea temperature in September
Diego Garcia, British Indian Ocean Territory

Average sea temperature in September: 27°C

The best months for swimming (with the highest average sea temperature) are March and April (29°C).
The coldest months (with the lowest average sea temperature) are June, July, August and September (27°C).

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Average daylight in September /
Average sunshine in September
Diego Garcia, British Indian Ocean Territory

Average daylight in September: 12h and 1min

The month with the longest days is December (Average daylight: 12h and 30min).
The month with the shortest days is June (Average daylight: 11h and 42min).

Average sunshine in September: 6h and 4min

The month with the most sunshine is February (Average sunshine: 9h and 18min).
The months with the least sunshine are June and September (Average sunshine: 6h and 42min).

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Average UV index in September
Diego Garcia, British Indian Ocean Territory

Average UV index in September: 12

The months with the highest UV index are January, February, March, April, August, September, October, November and December (UV index 12).
The months with the lowest UV index are June and July (UV index 10).

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September weather forecast
Diego Garcia, British Indian Ocean Territory

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