September weather forecast
Calixto, Cuba

The first month of the autumn, September, is also a hot month in Calixto, Cuba, with an average temperature varying between 32.3°C (90.1°F) and 22.9°C (73.2°F).

Temperature

During September, Calixto observes a subtle ascent to a still hot 32.3°C (90.1°F) from August's 33.4°C (92.1°F) in the average high-temperature. During September, the nighttime temperature averages to a pleasant 22.9°C (73.2°F).

Heat index

For most parts of September, the heat index is calculated to be a life-threatening hot 47°C (116.6°F). Vigilance: Heat cramps and heat exhaustion are likely. The likelihood of heatstroke increases with continued activity.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. With an abundance of moisture present in the air, the process of evaporation becomes less effective, and the body fails to cool down as it should, leading to the sensation of overheating. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

In September, the average relative humidity is 83%.

Rainfall

The month with the most rainfall in Calixto is September, when the rain falls for 22 days and typically aggregates up to 127mm (5") of precipitation.

Daylight

In September, the average length of the day in Calixto is 12h and 16min.
On the first day of the month, sunrise is at 06:51 and sunset at 19:23. On the last day of September, sunrise is at 06:58 and sunset at 18:56 CDT.

Sunshine

In September, the average sunshine in Calixto, Cuba, is 10.4h.

UV index

The months with the highest UV index in Calixto are April through September, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: A maximum high daily UV index of 7 during September translates into the following directions:
Ward off overexposure. Defence against solar 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. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.