September weather forecast
New Smyrna Beach, FL

The first month of the autumn, September, is still a tropical month in New Smyrna Beach, Florida, with an average temperature varying between 86.7°F (30.4°C) and 75.9°F (24.4°C).

Temperature

The advent of September reveals an average high-temperature of a still tropical 86.7°F (30.4°C), showing minimal difference from the prior month. New Smyrna Beach experiences a mean temperature of 75.9°F (24.4°C) during September nights.

Heat index

For September, the heat index is estimated at a very hot 100.4°F (38°C). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.
Heat index specifics point out values are for conditions of shade and a slight breeze. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is an aggregate value of air's warmth and moisture to show the human-felt temperature. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
The physiological way the human body responds to excessive heat is by inducing perspiration, using sweat evaporation as a cooling mechanism. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

In New Smyrna Beach, the average relative humidity in September is 76%.

Rainfall

In New Smyrna Beach, in September, during 14.8 rainfall days, 1.34" (34mm) of precipitation is typically accumulated. Throughout the year, there are 142.9 rainfall days, and 12.99" (330mm) of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 19min.
On the first day of September, sunrise is at 7:01 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 7:10 pm EDT.

Sunshine

In New Smyrna Beach, the average sunshine in September is 8.9h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: During September, 7 as the daily maximum UV index converts into the following advice:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.