September weather forecast
Fort De Soto, FL

The first month of the autumn, September, is also a hot month in Fort De Soto, Florida, with temperature in the range of an average low of 77.9°F (25.5°C) and an average high of 86.2°F (30.1°C).

Temperature

The advent of September presents an average high-temperature of a still hot 86.2°F (30.1°C), maintaining a close correlation with the preceding month. During the month of September, Fort De Soto's average nighttime temperature closely mirrors its daytime counterpart, at a warm 77.9°F (25.5°C).

Heat index

In September, the heat index is computed to be a sweltering 98.6°F (37°C). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.
Be advised, the heat index considers values for conditions in shade and with a light breeze. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', is a metric representing the sensation of warmth when air temperature and moisture come together. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
One way the human body deals with excessive warmth is by perspiring and allowing sweat to evaporate. An increase in relative humidity disrupts body cooling by slowing the evaporation rate, thereby reducing the rate at which the body cools and amplifying the sense of heat. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.

Humidity

The average relative humidity in September in Fort De Soto, Florida, is 75%.

Rainfall

In Fort De Soto, in September, during 21.5 rainfall days, 3.43" (87mm) of precipitation is typically accumulated. Throughout the year, there are 166.4 rainfall days, and 26.38" (670mm) of precipitation is accumulated.

Daylight

In Fort De Soto, the average length of the day in September is 12h and 19min.
On the first day of September, sunrise is at 7:10 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

The average sunshine in September in Fort De Soto is 9.1h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum UV index of 7 during September translates into these guidelines:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.