September weather forecast
Isles of Capri, FL

The first month of the autumn, September, is still a tropical month in Isles of Capri, Florida, with an average temperature ranging between min 78.4°F (25.8°C) and max 87.1°F (30.6°C).

Temperature

With September's advent, Isles of Capri sees an average high-temperature of a still hot 87.1°F (30.6°C), subtly shifted from August's 88.3°F (31.3°C). A mean low-temperature of 78.4°F (25.8°C) is a distinguishing feature of September, indicating a slight dip from daytime highs.

Heat index

The heat index value for September is computed to be a torrid 100.4°F (38°C). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
It is emphasized that the heat index's values are meant for shaded zones with mild winds. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. Heightened relative humidity interferes with the body's usual cooling mechanism by reducing evaporation, subsequently decreasing the body's cooling rate and increasing the sensation of heat. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.

Humidity

In Isles of Capri, the average relative humidity in September is 75%.

Rainfall

In Isles of Capri, in September, it is raining for 21.5 days, with typically 2.4" (61mm) of accumulated precipitation. Throughout the year, there are 162.1 rainfall days, and 21.69" (551mm) of precipitation is accumulated.

Daylight

In September, the average length of the day in Isles of Capri is 12h and 18min.
On the first day of the month, sunrise is at 7:07 am and sunset at 7:46 pm. On the last day of September, in Isles of Capri, sunrise is at 7:19 am and sunset at 7:14 pm EDT.

Sunshine

The average sunshine in September is 9.2h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in Isles of Capri. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 7 in September transforms into the following instructions:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.