September weather forecast and climate
Mariel, Cuba

Weather in September

The first month of the autumn, September, is still a tropical month in Mariel, Cuba, with temperature in the range of an average low of 25.7°C (78.3°F) and an average high of 30.6°C (87.1°F).

Temperature

In September, the average high-temperature is essentially the same as in August - a still hot 30.6°C (87.1°F). In September, in Mariel, the average low-temperature is 25.7°C (78.3°F).

Heat index

In September, the average heat index is computed to be a very hot 38.9°C (102°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With 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', 'feels like', or 'felt air temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Additional factors like activity, wind, differences in body mass, height, and shape, and pregnancy affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in Mariel is 78%.

Rainfall

In Mariel, in September, it is raining for 17.5 days, with typically 63mm (2.48") of accumulated precipitation. Throughout the year, in Mariel, there are 144.5 rainfall days, and 485mm (19.09") of precipitation is accumulated.

Sea temperature

In September, the average sea temperature is 29.6°C (85.3°F).
Note: 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.

Daylight

The average length of the day in September is 12.3h.

Sunshine

In September, the average sunshine is 9.3h.

UV index

Months with the highest UV index in Mariel, Cuba, are March through October, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to the UV radiation for the ordinary person.
Note: The daily maximum UV index of 7 interpret into the following advice:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the temperature in September in Mariel?

In Mariel, Cuba, in September, the average high-temperature is 30.6°C (87.1°F), and the average low-temperature is 25.7°C (78.3°F). In September, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, is computed to be 38.9°C (102°F).

What is the average humidity in September in Mariel?

The average relative humidity in September is 78%.

How much does it rain in Mariel in September?

In Mariel, in September, it is raining for 17.5 days, with typically 63mm (2.48") of accumulated precipitation.

How warm is the water in September in Mariel?

In Mariel, the average seawater temperature in September is 29.6°C (85.3°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.

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

The average length of the day in September is 12.3h.

How many hours of sunshine does Mariel have in September?

In Mariel, the average sunshine in September is 9.3h.

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

Months with the highest UV index in Mariel are March through October, with an average maximum UV index of 7.

What is the UV index intensity in September in Mariel?

The average daily maximum UV index in September in Mariel is 7. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to the UV radiation.

Average temperature in September
Mariel, Cuba

Average temperature in September - Mariel, Cuba
  • Average high temperature in September: 30.6°C

The warmest month (with the highest average high temperature) is August (31.6°C).
The month with the lowest average high temperature is January (24.9°C).

  • Average low temperature in September: 25.7°C

The month with the highest average low temperature is August (25.9°C).
The coldest month (with the lowest average low temperature) is January (19.6°C).

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Average pressure in September
Mariel, Cuba

Average pressure in September - Mariel, Cuba
  • Average pressure in September: 1013.2mbar

The month with the highest atmospheric pressure is January (1018.3mbar).
The month with the lowest atmospheric pressure is October (1013.1mbar).

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Average wind speed in September
Mariel, Cuba

Average wind speed in September - Mariel, Cuba
  • Average wind speed in September: 10.3km/h

The windiest months (with the highest average wind speed) are January and November (14.2km/h).
The calmest month (with the lowest average wind speed) is July (9.4km/h).

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Average humidity in September
Mariel, Cuba

Average humidity in September - Mariel, Cuba
  • Average humidity in September: 78%

Months with the highest relative humidity are October and December (79%).
The month with the lowest relative humidity is March (71%).

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Average rainfall in September
Mariel, Cuba

Average rainfall in September - Mariel, Cuba
  • Average rainfall in September: 63mm

The wettest month (with the highest rainfall) is August (73mm).
The driest month (with the least rainfall) is March (8mm).

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Average rainfall days in September
Mariel, Cuba

Average rainfall days in September - Mariel, Cuba
  • Average rainfall days in September: 17.5 days

The month with the highest number of rainy days is August (18.3 days).
The month with the least rainy days is March (5.8 days).

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Average sea temperature in September
Mariel, Cuba

Average sea temperature in September - Mariel, Cuba
  • Average sea temperature in September: 29.6°C

The best month for swimming (with the highest average sea temperature) is August (30.2°C).
The coldest month (with the lowest average sea temperature) is January (24.8°C).

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Average daylight in September /
Average sunshine in September
Mariel, Cuba

Average daylight in September / Average sunshine in September - Mariel, Cuba
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 13.5h).
The month with the shortest days is December (Average daylight: 10.7h).

  • Average sunshine in September: 9.3h

The month with the most sunshine is May (Average sunshine: 11h).
The month with the least sunshine is December (Average sunshine: 6.7h).

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Average sunshine days in September
Mariel, Cuba

Average sunshine days in September - Mariel, Cuba
  • Average sunshine days in September: 9.8 days

The month with the most sunshine days is March (24.7 days).
The month with the least sunshine days is September (9.8 days).

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Average UV index in September
Mariel, Cuba

Average UV index in September - Mariel, Cuba
  • Average UV index in September: 7

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

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Average cloud cover in September
Mariel, Cuba

Average cloud cover in September - Mariel, Cuba
  • Average cloud cover in September: 24

The month with the most cloud cover is January (Cloud cover 31).
The month with the least cloud cover is April (Cloud cover 19).

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Average visibility in September
Mariel, Cuba

Average visibility in September - Mariel, Cuba
  • Average visibility in September: 10km

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

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