September weather forecast
Feather Sound, FL

The first month of the autumn, September, is still a hot month in Feather Sound, Florida, with an average temperature fluctuating between 87.1°F (30.6°C) and 77.5°F (25.3°C).

Temperature

The beginning of September records an average high-temperature of a still tropical 87.1°F (30.6°C), marking a negligible difference from August's 88.9°F (31.6°C). An average minimum temperature of 77.5°F (25.3°C) is recorded during the month of September.

Heat index

The average heat index in September is calculated to be a torrid 100.4°F (38°C). Extra precautions are necessary, heat cramps and heat exhaustion are plausible outcomes. Extended activity could lead to heatstroke.
The heat index's values are generally associated with conditions in shade and light breezes. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', gives a temperature feeling by integrating air temperature and humidity. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

The average relative humidity in September is 74%.

Rainfall

In Feather Sound, Florida, in September, it is raining for 20 days, with typically 2.8" (71mm) of accumulated precipitation. In Feather Sound, Florida, during the entire year, the rain falls for 161.7 days and collects up to 24.76" (629mm) of precipitation.

Ocean temperature

In Feather Sound, in September, the average water temperature is 84.7°F (29.3°C).
Note: For any water activity, surface water temperatures from 77°F (25°C) to 84.2°F (29°C) are deemed perfect and extremely pleasing for enduring enjoyment.

Daylight

In September, the average length of the day is 12h and 19min.
On the first day of September, sunrise is at 7:09 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 7:17 pm EDT.

Sunshine

In September, the average sunshine is 9.2h.

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 rays for average individuals.
Note: The maximum UV index of 7 during September translates into these guidelines:
Inhibit overexposure. Warding off sun damage is of utmost importance. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Heads up! Sand and water reflection magnifies the UV exposure from the Sun.