Moroni
Comoros
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Moroni, Comoros

A clear view of an iconic mosque building, under clear blue skies, in Moroni, Comoros
A clear view of an iconic mosque building, under clear blue skies, in Moroni, Comoros
The first month of the spring, September, is also a moderately hot month in Moroni, Comoros, with average temperature fluctuating between 19°C (66.2°F) and 28.1°C (82.6°F).

Temperature

In Moroni, Comoros, the average high-temperature is almost the same as in August - a still warm 28.1°C (82.6°F). In September, the average low-temperature is 19°C (66.2°F).

Heat index

The average heat index is calculated to a hot 30.9°C (87.6°F). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'apparent temperature', 'felt air temperature', or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, differences in body mass, height, and shape, pregnancy). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In September, the average relative humidity in Moroni is 70%.

Rainfall

In Moroni, during September, the rain falls for 11 days and regularly aggregates up to 108mm (4.3") of precipitation. Throughout the year, there are 167 rainfall days, and 2700mm (106.3") of precipitation is accumulated.

Sea temperature

In Moroni, in September, the average water temperature is 26°C (78.8°F).
Note: 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.

Daylight

The average length of the day in September is 12h.

Sunshine

In Moroni, the average sunshine is 7.4h.

UV index

January through April, September through December, with an average maximum UV index of 12, are months with the highest UV index. A UV Index value of 11, and more, symbolizes an extreme health hazard from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the average maximum UV index of 12 translate into the following recommendations:
Take all necessary precautions, as unprotected skin can burn in minutes. 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. 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. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the temperature in September in Moroni?

In Moroni, in September, the average high-temperature is 28.1°C (82.6°F), and the average low-temperature is 19°C (66.2°F). In September, the average heat index (a.k.a. 'apparent temperature', 'feels like'), that represents influence of the relative humidity to air temperaure, is appraised at 30.9°C (87.6°F).

What is the average humidity in September in Moroni?

The average relative humidity in September in Moroni is 70%.

How much does it rain in Moroni in September?

In Moroni, during September, the rain falls for 11 days and regularly aggregates up to 108mm (4.3") of precipitation.

How warm is the water in September in Moroni?

In September, the average sea temperature in Moroni, Comoros, is 26°C (78.8°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the average length of the day in September in Moroni?

In September, the average length of the day in Moroni is 12h.

How many hours of sunshine does Moroni have in September?

In September, the average sunshine in Moroni is 7.4h.

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

January through April, September through December, with an average maximum UV index of 12, are months with the highest UV index in Moroni, Comoros.

What is the UV index intensity in September in Moroni?

In September, the average daily maximum UV index in Moroni is 12. A UV Index estimate of 11, and higher, represents an extreme health vulnerability from the exposure to the Sun's UV rays.
Average temperature in September - Moroni, Comoros
  • Average high temperature in September: 28.1°C

Warmest months (with the highest average high temperature) are March and December (30.8°C).
Months with the lowest average high temperature are July and August (27.7°C).

  • Average low temperature in September: 19°C

The month with the highest average low temperature is January (23.4°C).
The coldest month (with the lowest average low temperature) is August (18.4°C).

Average humidity in September - Moroni, Comoros
  • Average humidity in September: 70%

The month with the highest relative humidity is January (79%).
Months with the lowest relative humidity are July and August (65%).

Average rainfall in September - Moroni, Comoros
  • Average rainfall in September: 108mm

The wettest month (with the highest rainfall) is January (364mm).
The driest month (with the lowest rainfall) is October (97mm).

Average rainfall days in September - Moroni, Comoros
  • Average rainfall days in September: 11 days

Months with the highest number of rainy days are January, March and April (18 days).
The month with the lowest number of rainy days is August (10 days).

Average sea temperature in September - Moroni, Comoros
  • Average sea temperature in September: 26°C

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).

Average daylight in September / Average sunshine in September - Moroni, Comoros
  • Average daylight in September: 12h

The month with the longest days is December (Average daylight: 12.8h).
The month with shortest days is June (Average daylight: 11.4h).

  • Average sunshine in September: 7.4h

Months with most sunshine are June and November (Average sunshine: 7.7h).
The month with least sunshine is January (Average sunshine: 6h).

Average UV index in September - Moroni, Comoros
  • Average UV index in September: 12

Months with the highest UV index are January, February, March, April, September, October, November and December (UV index 12).
The month with the lowest UV index is June (UV index 8).