September weather forecast
Riviera Lagoons, FL

September, the first month of the autumn in Riviera Lagoons, is also a hot month, with temperature in the range of an average high of 88.7°F (31.5°C) and an average low of 75°F (23.9°C).

Temperature

At the onset of September, Riviera Lagoons records an average high-temperature of a still tropical 88.7°F (31.5°C), showing little deviation from the preceding month. An average low-temperature of 75°F (23.9°C) is recorded in the month of September.

Heat index

For most parts of September, the heat index is computed to be a blistering 107.6°F (42°C). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.
Bear in mind that the heat index values are determined for shaded areas and light breezes. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', evaluates the perceived heat by adding the effect of moisture in the air. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are of high significance for children. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

The most humid month is September, with an average relative humidity of 78%.

Rainfall

In September, the rain falls for 22.6 days. Throughout September, 3.5" (89mm) of precipitation is accumulated. Throughout the year, there are 181.8 rainfall days, and 29.37" (746mm) of precipitation is accumulated.

Daylight

In Riviera Lagoons, the average length of the day in September is 12h and 18min.
On the first day of the month, sunrise is at 7:07 am and sunset at 7:47 pm. On the last day of September, sunrise is at 7:20 am and sunset at 7:15 pm EDT.

Sunshine

In September, the average sunshine is 8.9h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: A typical high UV index of 7 in September suggests the following recommendations:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.