September weather forecast
Charlotte Harbor, FL

The first month of the autumn, September, is also a hot month in Charlotte Harbor, Florida, with an average temperature ranging between min 75.6°F and max 88.3°F.

Temperature

The arrival of September brings an average high-temperature of a still hot 88.3°F, nearly identical to August's 90.1°F. During the month of September, the temperature in Charlotte Harbor, Florida, generally drops to a low average of 75.6°F.

Heat index

The heat index value for September is computed to be a blistering 105.8°F. Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.
Bear in mind that the heat index values are determined for shaded areas and light breezes. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', integrates the air's temperature and its humidity to showcase the felt temperature by people. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are particularly meaningful for babies and toddlers. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

The most humid month in Charlotte Harbor is September, with an average relative humidity of 78%.

Rainfall

In Charlotte Harbor, in September, it is raining for 22.5 days, with typically 3.03" of accumulated precipitation. Throughout the year, there are 176 rainfall days, and 26.26" of precipitation is accumulated.

Ocean temperature

In Charlotte Harbor, the average seawater temperature in September is 84.9°F.
Note: For swimming, diving, and other water activities, temperatures between 77°F and 84.2°F are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

In September, the average length of the day in Charlotte Harbor is 12h and 19min.
On the first day of September in Charlotte Harbor, sunrise is at 7:07 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:16 pm EDT.

Sunshine

The average sunshine in September is 9h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the average person.
Note: A maximum UV index of 7 in September translates into the following recommendations:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Boost your sun resistance with garments that are densely woven yet spacious. Take note! Sand and water reflections strengthen the Sun's UV exposure.