September weather forecast
Guantanamo, Cuba

September serves as a prelude to autumn in Guantanamo, presenting a subtle downturn in temperature. Rainfall registers 95mm (3.74"), matching the high levels of precipitation recorded in May. This shift in climatic conditions stands out as a harbinger of the impending change. Compared to August, September carries prestigious signs of the transition into the cooler season, despite bearing similar levels of sunshine duration. These transformations carry on into October as the warmth of summer starts becoming a distant memory.

Temperature

September in Guantanamo begins with an average high-temperature of a still tropical 30.9°C (87.6°F), reflecting close similarity to the preceding month. An average low-temperature of 23.5°C (74.3°F) is expected in Guantanamo during September.

Heat index

The heat index for September is calculated to be an extremely hot 40°C (104°F). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
Always consider that heat index estimations are for light winds and places in the shade. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly important for children. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
The human body keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. The body is at risk of dehydration and related complications when it fails to shed excessive heat.

Humidity

The average relative humidity in September in Guantanamo is 79%.

Rainfall

The months with the most rainfall in Guantanamo are May and September, with an average 95mm (3.74") of precipitation.

Daylight

The average length of the day in September is 12h and 15min.
On the first day of September, sunrise is at 06:45 and sunset at 19:15. On the last day of the month, sunrise is at 06:51 and sunset at 18:49 CDT.

Sunshine

The average sunshine in September in Guantanamo is 10.7h.

UV index

April through October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 7 in September converts into the following recommendations:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Experience reduced UV exposure by about half when donning a wide-brim hat.