September weather forecast
Gateway, FL

The first month of the autumn, September, is still a tropical month in Gateway, Florida, with temperature in the range of an average high of 87.6°F (30.9°C) and an average low of 76.6°F (24.8°C).

Temperature

The onset of September brings an average high-temperature of a still tropical 87.6°F (30.9°C), nearly matching the August temperature. Gateway's temperature lowers to a mean of 76.6°F (24.8°C) during the nights in September.

Heat index

The heat index value for September is estimated at an extremely hot 104°F (40°C). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. 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 extremely significant for children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

The most humid month is September, with an average relative humidity of 77%.

Rainfall

In Gateway, in September, during 23.5 rainfall days, 3.43" (87mm) of precipitation is typically accumulated. Throughout the year, there are 170 rainfall days, and 23.82" (605mm) of precipitation is accumulated.

Daylight

The average length of the day in September in Gateway, Florida, is 12h and 18min.
On the first day of the month, sunrise is at 7:07 am and sunset at 7:46 pm. On the last day of September, sunrise is at 7:19 am and sunset at 7:14 pm EDT.

Sunshine

In Gateway, the average sunshine in September 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 of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, the maximum UV index of 7 transforms into these recommendations:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.