September weather forecast
Marianao, Cuba

The first month of the autumn, September, is also a hot month in Marianao, Cuba, with an average temperature varying between 31.5°C (88.7°F) and 24.1°C (75.4°F).

Temperature

At the onset of September, Marianao records an average high-temperature of a still tropical 31.5°C (88.7°F), showing little deviation from the preceding month. Marianao experiences a nighttime temperature average of 24.1°C (75.4°F) during September.

Heat index

In September, the heat index is estimated at an extremely hot 43°C (109.4°F). Keep wary: Heat cramps along with heat exhaustion are expected. Heatstroke is a possible outcome of ongoing activity.
Heat index determinations are made taking into account the shade and light air movements. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

The months with the highest humidity are September and October, with an average relative humidity of 80%.

Rainfall

In Marianao, Cuba, during September, the rain falls for 25.2 days and regularly aggregates up to 105mm (4.13") of precipitation. Throughout the year, there are 204.8 rainfall days, and 802mm (31.57") of precipitation is accumulated.

Daylight

The average length of the day in September is 12h and 16min.
On the first day of September in Marianao, sunrise is at 07:12 and sunset at 19:46. On the last day of the month, sunrise is at 07:21 and sunset at 19:17 CDT.

Sunshine

The average sunshine in September in Marianao is 8.9h.

UV index

The months with the highest UV index are March through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A maximum daily UV index of 7 during September morphs into the following directions:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.