September weather - Spring 2024

Weather in September
Frequently asked questions
Average temperature in September
Average pressure in September
Average wind speed in September
Average humidity 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 sunshine days in September
Average UV index in September
Average cloud cover in September
Average visibility in September

An iconic mosque building, under clear blue skies, in Moroni, Comoros

Weather in September

September experiences a slight increase in rainfall compared to August, but the city remains relatively drier. Sea temperatures begin to rise again, signifying the imminent end of the dry season. The longer sunshine hours during September add a spark to the city life. The rise in sea temperature creates perfect conditions for sea activities like swimming and sailing. September serves as a transition month, bidding goodbye to the dry season and welcoming a gradually increasing wet period.

Temperature

July through September, when the average high-temperature in Moroni reaches 25.3°C (77.5°F), are the coldest months.

Humidity

The average relative humidity in September is 75%.

Rainfall

September is the month with the least rainfall. Rain falls for 8.4 days and accumulates 11mm (0.43") of precipitation.

Sea temperature

In September, the average sea temperature in Moroni is 26°C (78.8°F).
Note: Temperatures between 25°C (77°F) and 29°C (84.2°F) are ideal for swimming, diving, and similar water activities, ensuring pleasure and comfort for extended periods without feeling uneasy.

Daylight

In Moroni, the average length of the day in September is 12h and 2min.
On the first day of September in Moroni, sunrise is at 06:10 and sunset at 18:03. On the last day of the month, sunrise is at 05:50 and sunset at 18:02 EAT.

Sunshine

In Moroni, Comoros, the average sunshine in September is 10.3h.

UV index

January through June, September through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for average individuals.
Note: In September, a daily UV index of 7 turns into the following recommendations:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Stay aware! UV radiation is magnified when reflecting off sand and water.

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Frequently asked questions

What time of the year is the coldest in Moroni?

July through September, with an average high-temperature of 25.3°C (77.5°F), are marked as the coldest months in Moroni, Comoros.

What are September temperatures in Moroni?

The high-temperature in Moroni during September is 25.3°C (77.5°F) and the low-temperature is 24°C (75.2°F). In May, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 30°C (86°F).

What is the average humidity in September in Moroni?

In Moroni, Comoros, the average relative humidity in September is 75%.

What is the driest month in Moroni?

The month with the least rainfall in Moroni, Comoros, is September, when the rain falls for 8.4 days and typically collects 11mm (0.43") of precipitation.

How many days does it rain in September in Moroni?

In Moroni, Comoros, during September, the rain falls for 8.4 days and regularly aggregates up to 11mm (0.43") of precipitation.

How warm is the water in September in Moroni?

In Moroni, Comoros, in September, the average water temperature is 26°C (78.8°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 Moroni?

In Moroni, Comoros, the average day length in September is 12h and 2min.

When are sunrise and sunset in September in Moroni?

On the first day of September in Moroni, sunrise is at 06:10 and sunset at 18:03. On the last day of the month, sunrise is at 05:50 and sunset at 18:02 EAT.

How long on average sun shines in September in Moroni?

In September, the average sunshine duration is 10.3h.

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

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

What is the UV index reading in September in Moroni?

The average daily maximum UV index in September is 7. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

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

Aug

September

Oct

Average high temperature

25.3°C 77.5°F

26.5°C 79.7°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

19.1km/h 11.9mph

13.4km/h 8.3mph

12.9km/h 8mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

10.3

8.4

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

17.4

18.1

16.5

Average UV index

Average cloud cover

20%

26%

Average visibility

10km 6.2mi

Average temperature in September
Moroni, Comoros

Average high temperature in September: 25.3°C

The warmest month (with the highest average high temperature) is March (28.8°C).
The months with the lowest average high temperature are July, August and September (25.3°C).

Average low temperature in September: 24°C

The month with the highest average low temperature is March (27.1°C).
The coldest month (with the lowest average low temperature) is August (23.8°C).

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Average pressure in September
Moroni, Comoros

Average pressure in September: 1016.2mbar

The month with the highest atmospheric pressure is July (1017mbar).
The month with the lowest atmospheric pressure is February (1010mbar).

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Average wind speed in September
Moroni, Comoros

Average wind speed in September: 12.9km/h

The windiest month (with the highest average wind speed) is July (23.7km/h).
The calmest month (with the lowest average wind speed) is November (11.2km/h).

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Average humidity in September
Moroni, Comoros

Average humidity in September: 75%

The month with the highest relative humidity is January (78%).
The months with the lowest relative humidity are July and August (74%).

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Average rainfall in September
Moroni, Comoros

Average rainfall in September: 11mm

The wettest month (with the highest rainfall) is January (233mm).
The driest month (with the least rainfall) is September (11mm).

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Average rainfall days in September
Moroni, Comoros

Average rainfall days in September: 8.4 days

The months with the highest number of rainy days are March and April (23 days).
The month with the least rainy days is September (8.4 days).

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Average sea temperature in September
Moroni, Comoros

Average sea temperature in September: 26°C

The best months for swimming (with the highest average sea temperature) are January, February, March and April (29°C).
The coldest month (with the lowest average sea temperature) is August (25°C).

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Average daylight in September /
Average sunshine in September
Moroni, Comoros

Average daylight in September: 12h and 0min

The month with the longest days is December (Average daylight: 12h and 48min).
The month with the shortest days is June (Average daylight: 11h and 24min).

Average sunshine in September: 10h and 2min

The month with the most sunshine is November (Average sunshine: 11h and 18min).
The month with the least sunshine is May (Average sunshine: 6h and 54min).

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Average sunshine days in September
Moroni, Comoros

Average sunshine days in September: 18.1 days

The month with the most sunshine days is September (18.1 days).
The month with the least sunshine days is April (5.8 days).

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Average UV index in September
Moroni, Comoros

Average UV index in September: 7

The months with the highest UV index are January, February, March, April, May, June, September, October, November and December (UV index 7).
The months with the lowest UV index are July and August (UV index 6).

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Average cloud cover in September
Moroni, Comoros

Average cloud cover in September: 20

The month with the most cloud cover is January (Cloud cover 40).
The months with the least cloud cover are August and September (Cloud cover 20).

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Average visibility in September
Moroni, Comoros

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).

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September weather forecast
Moroni, Comoros

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