September weather forecast
South Bay, FL

The first month of the autumn, September, is also a hot month in South Bay, Florida, with temperature in the range of an average low of 74.8°F (23.8°C) and an average high of 87.1°F (30.6°C).

Temperature

South Bay's average high-temperature in September sits at a still hot 87.1°F (30.6°C), showing little difference from the previous month. In South Bay, an average nighttime temperature of 74.8°F (23.8°C) is expected during September.

Heat index

The average heat index in September is estimated at a scorching 104°F (40°C). Incorporate extra safety measures to avoid heat exhaustion and heat cramps. Continuous activity could provoke heatstroke.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.
In the face of high temperatures, the human body's reflex is to perspire, leveraging sweat evaporation for cooling. Increased relative humidity slows down evaporation, thereby decreasing the rate of heat removal from the body, culminating in a sensation of overheating. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

The most humid month is September, with an average relative humidity of 81%.

Rainfall

In South Bay, Florida, during September, the rain falls for 22.4 days and regularly aggregates up to 2.52" (64mm) of precipitation. Throughout the year, in South Bay, there are 178.9 rainfall days, and 20.51" (521mm) of precipitation is accumulated.

Daylight

The average length of the day in September in South Bay, Florida, is 12h and 18min.
On the first day of the month, sunrise is at 7:02 am and sunset at 7:42 pm. On the last day of September, sunrise is at 7:15 am and sunset at 7:10 pm EDT.

Sunshine

In South Bay, the average sunshine in September is 9h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum daily UV index of 7 during September translates into the following directions:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.