September weather forecast
Fort Myers Beach, FL

A notable change in Fort Myers Beach's weather is observed in September, with a reduction in the high temperatures and rainfall that dominated August. However, the month does not bring a significant drop in humidity. The sea remains warm enough for bathing, but a decrease in the average daylight hours indicates the onset of fall. The winds gain speed, further contributing to the climate shift. As September ends, it paves the way for the cooler autumn months ahead.

Temperature

In September, Fort Myers Beach experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 88°F (31.1°C) in August to a still hot 86.5°F (30.3°C). Throughout September, Fort Myers Beach's nights experience a slight temperature dip to a warm 79.2°F (26.2°C).

Heat index

September's heat index is calculated to be a torrid 98.6°F (37°C). Emphasize additional safety, risk of heat cramps and heat exhaustion is high. Continuous activity might result in heatstroke.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is an aggregate value of air's warmth and moisture to show the human-felt temperature. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. Rising body temperatures due to excess heat retention could signify impending heat disorders.

Humidity

The average relative humidity in September is 75%.

Rainfall

In Fort Myers Beach, during September, the rain falls for 25.3 days and regularly aggregates up to 6.18" (157mm) of precipitation. Throughout the year, there are 190.9 rainfall days, and 41.73" (1060mm) of precipitation is accumulated.

Ocean temperature

In Fort Myers Beach, Florida, the average seawater temperature in September is 85.6°F (29.8°C).
Note: Water temperature between 77°F (25°C) and 84.2°F (29°C) provides warmth and pleasure, making water activities enjoyable for lengthened periods without feeling uncomfortable.

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 7:14 pm EDT.

Sunshine

In Fort Myers Beach, 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 threat to health from exposure to the Sun's UV rays for the average person.
Note: A maximum daily UV index of 7 during September morphs into the following directions:
Shun overexposure. Protection from sun ravages is indispensable. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Warning! The Sun's UV rays intensify with reflections from sand and water.