September weather forecast
Mariel, Cuba

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Weather in September

September presents a noticeable transition into a less aggressive weather pattern as Mariel inches closer to the end of the wet season. Although a strong likelihood of rain persists, the town observes a marginal drop in both temperatures and humidity. Interestingly, sea temperatures take a slight plunge to 29.6°C (85.3°F), offering a refreshing breather to Mariel's warmer summer months. Moreover, pressure picks up, promoting less volatile weather and forecasting a shift towards the cooler end of the year.

Temperature

September notes an average high-temperature of a still hot 30.6°C (87.1°F), subtly differing from August's 31.6°C (88.9°F). Mariel's September nights exhibit a subtle drop in temperature, averaging at a warm 25.7°C (78.3°F), closely aligned with the daytime highs.

Heat index

September's average heat index is estimated at a fiery hot 39°C (102.2°F). Heightened safety actions are necessary, heat cramps and heat exhaustion are probable. Persistent activity may lead to heatstroke.
Heat index readings emphasize conditions of light breezes and shaded spots. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'feels like' or 'apparent temperature', measures the perceived warmth when incorporating the humidity present in the air. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.

Humidity

The average relative humidity in September 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 Mariel, the average seawater temperature in September is 29.6°C (85.3°F).
Note: Ideal surface water temperatures for any water activity fall between 25°C (77°F) and 29°C (84.2°F), offering maximum enjoyment for lengthened periods.

Daylight

In Mariel, the average length of the day in September is 12h and 16min.
On the first day of the month, sunrise is at 07:13 and sunset at 19:48. On the last day of September, sunrise is at 07:22 and sunset at 19:19 CDT.

Sunshine

The average sunshine in September is 9.3h.

UV index

The months with the highest UV index are March through October, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily high UV index of 7 in September translates into this advice:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Beware! Reflecting off water and sand, UV rays are much stronger.
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Frequently asked questions

How hot is September in Mariel?

Mariel in September has an average high-temperature of 30.6°C (87.1°F) and an average low-temperature of 25.7°C (78.3°F). In September, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines air temperature and relative humidity, is estimated at 39°C (102.2°F).

What is the average humidity in September in Mariel?

In Mariel, Cuba, the average relative humidity in September is 78%.

How many days does it rain in September in Mariel?

In Mariel, Cuba, 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, in September, the average water temperature 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?

In September, the average day length in Mariel is 12h and 16min.

What time are sunrise and sunset in September in Mariel?

On the first day of September, sunrise is at 07:13 and sunset at 19:48. On the last day of the month, sunrise is at 07:22 and sunset at 19:19 CDT.

How many hours of sunshine does Mariel have in September?

In September, the average sunshine duration is 9.3h.

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

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

What is the UV index reading in September in Mariel?

In September, the average daily maximum UV index in Mariel, Cuba, is 7. A UV Index of 6 to 7 symbolizes a high hazard to health from exposure to Sun's UV rays.

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%

The 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: 12h and 2min

The month with the longest days is June (Average daylight: 13h and 30min).
The month with the shortest days is December (Average daylight: 10h and 48min).

  • Average sunshine in September: 9h and 2min

The month with the most sunshine is May (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).

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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

The months with the highest UV index are March, April, May, June, July, August, September and October (UV index 7).
The 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

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

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Mariel, Cuba

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