September weather forecastShell Bluff, FL

Weather in September

September, the first month of the autumn in Shell Bluff, is still a tropical month, with an average temperature ranging between max 88.7°F (31.5°C) and min 73.4°F (23°C).

Temperature

The average high-temperature during September registers at a still tropical 88.7°F (31.5°C), closely corresponding to the preceding month. Shell Bluff experiences a mean temperature of 73.4°F (23°C) during September nights.

Heat index

For September, the heat index is estimated at a blisteringly hot 105.8°F (41°C). Heightened safety actions are necessary, heat cramps and heat exhaustion are probable. Persistent activity may lead to heatstroke.
It is emphasized that the heat index's values are meant for shaded zones with mild winds. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a single figure representing how weather conditions feel when combining temperature and humidity. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. 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 largely significant for babies and toddlers. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

The months with the highest humidity are July through September, with an average relative humidity of 77%.

Rainfall

In Shell Bluff, in September, during 15.7 rainfall days, 1.85" (47mm) of precipitation is typically accumulated. In Shell Bluff, during the entire year, the rain falls for 151.1 days and collects up to 17.99" (457mm) of precipitation.

Daylight

The average length of the day in September is 12h and 20min.
On the first day of September, sunrise is at 7:03 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 7:12 pm EDT.

Sunshine

In September, the average sunshine is 8.1h.

UV index

In Shell Bluff, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the ordinary person.
Note: A maximum daily UV index of 6 during September morphs into the following directions:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. During bright days, sunglasses that offer UVA and UVB defense are recommended.