September weather forecast
South Tampa, FL

The first month of the autumn, September, is still a tropical month in South Tampa, Florida, with an average temperature varying between 88.7°F (31.5°C) and 74.8°F (23.8°C).

Temperature

September ushers in an average high-temperature of a still tropical 88.7°F (31.5°C), aligning closely with the preceding month. South Tampa observes an average low-temperature of 74.8°F (23.8°C) during September nights.

Heat index

During September, the heat index is evaluated at an extremely hot 105.8°F (41°C). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
The heat index's values are generally associated with conditions in shade and light breezes. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is an estimation of the warmth sensation when considering humidity levels. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. 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 highly important for children. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.

Humidity

The months with the highest humidity are August, September and December, with an average relative humidity of 76%.

Rainfall

In September, the rain falls for 19.6 days. Throughout September, 1.65" (42mm) of precipitation is accumulated. Throughout the year, there are 160.9 rainfall days, and 16.77" (426mm) of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 19min.
On the first day of the month, sunrise is at 7:09 am and sunset at 7:50 pm. On the last day of September, sunrise is at 7:22 am and sunset at 7:16 pm EDT.

Sunshine

In South Tampa, the average sunshine in September is 8.9h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the average person.
Note: In September, the maximum UV index of 7 suggests this advice:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.