September weather forecast
Apalachicola, FL

September, the first month of the autumn in Apalachicola, is still a warm month, with an average temperature ranging between min 76.1°F (24.5°C) and max 85.1°F (29.5°C).

Temperature

On the advent of September, Apalachicola's average high-temperature exhibits a minor adjustment to a warm 85.1°F (29.5°C) from August's 87.4°F (30.8°C). Apalachicola sustains an average of approximately a still moderately hot 76.1°F (24.5°C) during September nights, with little variation from daytime highs.

Heat index

September's mean heat index is computed to be a sweltering 95°F (35°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Keep in mind the heat index values are meant for areas in shade and with light wind. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', shows a temperature sensation when both heat and moisture conditions are combined. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
By perspiring, the human body can shed its excessive warmth since evaporated sweat cools it off. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

In September, the average relative humidity is 75%.

Rainfall

In Apalachicola, in September, during 20 rainfall days, 3.58" (91mm) of precipitation is typically accumulated. In Apalachicola, during the entire year, the rain falls for 171.9 days and collects up to 36.81" (935mm) of precipitation.

Ocean temperature

In September, the average ocean temperature in Apalachicola is 83.5°F (28.6°C).
Note: Water temperatures between 77°F (25°C) and 84.2°F (29°C) are ideal for swimming, diving, and other activities, ensuring comfort and enjoyment for lengthened periods.

Daylight

In Apalachicola, the average length of the day in September is 12h and 20min.
On the first day of September in Apalachicola, sunrise is at 7:17 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 7:26 pm EDT.

Sunshine

In Apalachicola, the average sunshine in September is 9.1h.

UV index

The average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: In September, the maximum UV index of 6 suggests these recommendations:
Prevent overexposure. Protection from the sun's harmful effects is needed. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Stay alert! Reflective properties of sand and water amplify the Sun's UV radiation.