September weather forecast
Fomboni, Comoros

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Weather in September

In September, there begins to be a noticeable change in weather patterns in Fomboni. Although the temperature and other weather indicators remain consistent, there is another decrease in rainfall from August to a meager 8mm (0.31"). This shift from the preceding month shows the transition to a wetter season, with rainfall levels that remain relatively low in comparison to the rest of the year. The consistency in the tropical climate and reduced rainfall implies a weather inviting for tourists seeking warm temperatures and optimal outdoor conditions.

Temperature

The coldest period, with an average high-temperature of 25.4°C (77.7°F), falls in August and September.

Humidity

The average relative humidity in September in Fomboni is 75%.

Rainfall

The month with the least rainfall in Fomboni is September, when the rain falls for 6.4 days and typically collects 8mm (0.31") of precipitation.

Sea temperature

July through September, with an average sea temperature of 26°C (78.8°F), are months with the coldest seawater.
Note: A water temperature from 25°C (77°F) to 29°C (84.2°F) is considered very warm and enjoyable, allowing water activities to be pleasant for extended periods without irritation.

Daylight

In September, the average length of the day in Fomboni is 12h and 2min.
On the first day of September in Fomboni, sunrise is at 06:08 and sunset at 18:01. On the last day of the month, sunrise is at 05:48 and sunset at 18:01 EAT.

Sunshine

The average sunshine in September in Fomboni is 8.3h.

UV index

The months with the highest UV index in Fomboni 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 estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, the maximum UV index of 7 transforms into these recommendations:
Ward off overexposure. Defence against solar harm is crucial. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. 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. Stay cautious! Sand and water reflections increase UV radiation potency.
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Frequently asked questions

What is the coldest month in Fomboni?

Fomboni witnesses its lowest temperatures during August and September, when the average high-temperature reaches 25.4°C (77.7°F).

What is the usual temperature for Fomboni in September?

The high-temperature, in September, in Fomboni, records 25.4°C (77.7°F), while the low-temperature is 24.7°C (76.5°F). In May, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which represents the influence of relative humidity on air temperature, is appraised at 32°C (89.6°F).

What is the average humidity in September in Fomboni?

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

What is the driest month in Fomboni?

The month with the least rainfall in Fomboni, Comoros, is September, when the rain falls for 6.4 days and typically collects 8mm (0.31") of precipitation.

How many days does it rain in September in Fomboni?

In Fomboni, Comoros, during September, the rain falls for 6.4 days and regularly aggregates up to 8mm (0.31") of precipitation.

What months are the sea coldest in Fomboni?

July through September, with an average sea temperature of 26°C (78.8°F), are months with the coldest seawater.

What is the sea water temperature in September in Fomboni?

In Fomboni, Comoros, the average seawater temperature in September 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 Fomboni?

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

When are sunrise and sunset in September in Fomboni?

On the first day of September in Fomboni, sunrise is at 06:08 and sunset at 18:01. On the last day of the month, sunrise is at 05:48 and sunset at 18:01 EAT.

How long on average sun shines in September in Fomboni?

In Fomboni, Comoros, the average sunshine duration in September is 8.3h.

When is the highest UV index in Fomboni?

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

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

January through December, with an average maximum UV index of 7, are months with the lowest UV index in Fomboni, Comoros.

What is the UV index intensity in September in Fomboni?

In September, the average daily maximum UV index in Fomboni, Comoros, is 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to UV radiation.
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Average temperature in September
Fomboni, Comoros

Average temperature in September - Fomboni, Comoros
  • Average high temperature in September: 25.4°C

The warmest months (with the highest average high temperature) are March and April (28.9°C).
The months with the lowest average high temperature are August and September (25.4°C).

  • Average low temperature in September: 24.7°C

The months with the highest average low temperature are February and March (28°C).
The coldest months (with the lowest average low temperature) are August and September (24.7°C).

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Average pressure in September
Fomboni, Comoros

Average pressure in September - Fomboni, Comoros
  • Average pressure in September: 1016.4mbar

The month with the highest atmospheric pressure is August (1017mbar).
The month with the lowest atmospheric pressure is February (1010.3mbar).

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Average wind speed in September
Fomboni, Comoros

Average wind speed in September - Fomboni, Comoros
  • Average wind speed in September: 11.4km/h

The windiest month (with the highest average wind speed) is July (20.9km/h).
The calmest month (with the lowest average wind speed) is September (11.4km/h).

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Average humidity in September
Fomboni, Comoros

Average humidity in September - Fomboni, Comoros
  • Average humidity in September: 75%

The month with the highest relative humidity is November (77%).
The month with the lowest relative humidity is July (72%).

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Average rainfall in September
Fomboni, Comoros

Average rainfall in September - Fomboni, Comoros
  • Average rainfall in September: 8mm

The wettest month (with the highest rainfall) is January (179mm).
The driest month (with the least rainfall) is September (8mm).

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Average rainfall days in September
Fomboni, Comoros

Average rainfall days in September - Fomboni, Comoros
  • Average rainfall days in September: 6.4 days

The month with the highest number of rainy days is January (23.2 days).
The month with the least rainy days is September (6.4 days).

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Average sea temperature in September
Fomboni, Comoros

Average sea temperature in September - Fomboni, 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 months (with the lowest average sea temperature) are July, August and September (26°C).

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

Average daylight in September / Average sunshine in September - Fomboni, 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: 8h and 2min

The month with the most sunshine is December (Average sunshine: 10h and 30min).
The months with the least sunshine are May and August (Average sunshine: 7h and 0min).

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Average sunshine days in September
Fomboni, Comoros

Average sunshine days in September - Fomboni, Comoros
  • Average sunshine days in September: 20.4 days

The month with the most sunshine days is September (20.4 days).
The month with the least sunshine days is January (5.3 days).

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Average UV index in September
Fomboni, Comoros

Average UV index in September - Fomboni, Comoros
  • 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).

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Average cloud cover in September
Fomboni, Comoros

Average cloud cover in September - Fomboni, Comoros
  • Average cloud cover in September: 24

The month with the most cloud cover is January (Cloud cover 43).
The months with the least cloud cover are July and August (Cloud cover 21).

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Average visibility in September
Fomboni, Comoros

Average visibility in September - Fomboni, 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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