September weather forecast
Atlantis, FL

September, the first month of the autumn in Atlantis, is also a moderately hot month, with temperature in the range of an average high of 85.1°F (29.5°C) and an average low of 80.1°F (26.7°C).

Temperature

The arrival of September brings an average high-temperature of a warm 85.1°F (29.5°C), closely following the temperature pattern of August. September nights experience a minor temperature downturn to a still moderately hot 80.1°F (26.7°C).

Heat index

The heat index in September is calculated to be a torrid 95°F (35°C). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
Note that heat index values are valued for light wind and location in the shade. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
The natural method the human body uses to remove excess heat is by perspiring and letting sweat evaporate. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

In September, the average relative humidity is 75%.

Rainfall

In Atlantis, Florida, in September, during 26.8 rainfall days, 7.48" (190mm) of precipitation is typically accumulated. In Atlantis, during the entire year, the rain falls for 238.3 days and collects up to 54.53" (1385mm) of precipitation.

Daylight

In Atlantis, the average length of the day in September is 12h and 18min.
On the first day of September, sunrise is at 7:00 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 7:07 pm EDT.

Sunshine

In Atlantis, the average sunshine in September is 8.9h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the average person.
Note: An average maximum UV index of 7 in September leads to these recommendations:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.