September weather forecast
North Fort Myers, FL

September, the first month of the autumn in North Fort Myers, is still a hot month, 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

On the advent of September, North Fort Myers's average high-temperature exhibits a minor adjustment to a still tropical 87.6°F (30.9°C) from August's 89.4°F (31.9°C). An average low-temperature of 76.6°F (24.8°C) is noted during the month of September.

Heat index

For most parts of September, the heat index is estimated at a fiery hot 102.2°F (39°C). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.
Bear in mind that the heat index values are determined for shaded areas and light breezes. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', gives a temperature feeling by integrating air temperature and humidity. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly important for children. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

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

Rainfall

In September, in North Fort Myers, the rain falls for 20.9 days. Throughout September, 2.95" (75mm) of precipitation is accumulated. In North Fort Myers, Florida, during the entire year, the rain falls for 159.2 days and collects up to 23.54" (598mm) of precipitation.

Ocean temperature

In North Fort Myers, in September, the average water temperature is 84.9°F (29.4°C).
Note: For activities in the water such as swimming or diving, temperatures from 77°F (25°C) to 84.2°F (29°C) are considered optimal for prolonged enjoyment without discomfort.

Daylight

In September, the average length of the day in North Fort Myers is 12h and 18min.
On the first day of the month, sunrise is at 7:07 am and sunset at 7:47 pm. On the last day of September, sunrise is at 7:19 am and sunset at 7:14 pm EDT.

Sunshine

The average sunshine in September in North Fort Myers is 9.2h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in North Fort Myers. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: A daily maximum UV index of 7 in September translates into the following instructions:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Note! The Sun's UV radiation gets intensified with the reflection from sand and water.