September weather forecast
Keysville, FL

The first month of the autumn, September, is still a hot month in Keysville, Florida, with an average temperature varying between 73.6°F (23.1°C) and 88.2°F (31.2°C).

Temperature

The initiation of September records an average high-temperature of a still hot 88.2°F (31.2°C), displaying a near consistency with the previous month. Keysville encounters a steady low-temperature average of 73.6°F (23.1°C) throughout the month of September.

Heat index

In September, the average heat index is estimated at a blisteringly hot 105.8°F (41°C). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.
It is emphasized that the heat index's values are meant for shaded zones with mild winds. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', reflects the feeling of heat when considering both air temperature and humidity. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are quite important for babies and toddlers. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
The process of perspiration is vital for the human body to get rid of excess warmth by allowing sweat to evaporate. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.

Humidity

August and September, with an average relative humidity of 79%, are the most humid months.

Rainfall

In Keysville, during September, the rain falls for 20.6 days and regularly aggregates up to 3.98" (101mm) of precipitation. Throughout the year, in Keysville, Florida, there are 189 rainfall days, and 36.54" (928mm) of precipitation is accumulated.

Daylight

The average length of the day in September in Keysville, Florida, is 12h and 19min.
On the first day of the month, sunrise is at 7:07 am and sunset at 7:48 pm. On the last day of September, sunrise is at 7:21 am and sunset at 7:15 pm EDT.

Sunshine

In September, the average sunshine is 8.6h.

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 health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: The maximum UV index, 7 during September, leads to the following recommendations:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.