September weather forecast
Iona, FL

September, the first month of the autumn in Iona, is still a hot month, with temperature in the range of an average high of 87.3°F (30.7°C) and an average low of 77.5°F (25.3°C).

Temperature

September brings an average high-temperature of a still hot 87.3°F (30.7°C), showing a slight difference from August's 88.9°F (31.6°C). Throughout September, the temperature falls to an average low of 77.5°F (25.3°C).

Heat index

During September, the heat index is evaluated at a sweltering 102.2°F (39°C). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. In high relative humidity, the body's ability to evaporate heat is diminished, resulting in a heightened feeling of warmth. The body is at risk of dehydration and related complications when it fails to shed excessive heat.

Humidity

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

Rainfall

In Iona, in September, it is raining for 21.2 days, with typically 2.6" (66mm) of accumulated precipitation. Throughout the year, in Iona, there are 156.4 rainfall days, and 17.95" (456mm) of precipitation is accumulated.

Ocean temperature

In September, the average ocean temperature is 84.9°F (29.4°C).
Note: Water activities including swimming and diving at temperatures from 77°F (25°C) to 84.2°F (29°C) are deemed very pleasurable and enjoyable for extended periods, devoid of discomfort.

Daylight

The average length of the day in September is 12h and 18min.
On the first day of September, sunrise is at 7:07 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:15 pm EDT.

Sunshine

In Iona, 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 reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for average individuals.
Note: During September, 7 as the daily maximum UV index converts into the following advice:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. 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. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Watch out! Sand and water enhance the UV exposure you receive.