September weather forecast
Island Grove, FL

The first month of the autumn, September, is still a tropical month in Island Grove, Florida, with an average temperature fluctuating between 72.3°F (22.4°C) and 88°F (31.1°C).

Temperature

September's arrival registers an average high-temperature of a still tropical 88°F (31.1°C), closely aligning with the temperature of the previous month. Island Grove experiences a nighttime temperature average of 72.3°F (22.4°C) during September.

Heat index

In September, the heat index is calculated to be an extremely hot 105.8°F (41°C). Undertake extra safety actions, heat cramps and heat exhaustion are expected. Heatstroke may result from lengthy activity.
Remember that heat index calculations are made for conditions in the shade with light wind. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. Excessive relative humidity disturbs the body's typical cooling process by reducing evaporation, leading to a decrease in body cooling rate and an increase in the sensation of warmth. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

The months with the highest humidity are July through September, with an average relative humidity of 78%.

Rainfall

In Island Grove, during September, the rain falls for 16.8 days and regularly aggregates up to 1.61" (41mm) of precipitation. Throughout the year, there are 162.6 rainfall days, and 24.09" (612mm) of precipitation is accumulated.

Daylight

In Island Grove, the average length of the day in September is 12h and 20min.
On the first day of the month, sunrise is at 7:06 am and sunset at 7:50 pm. On the last day of September, in Island Grove, sunrise is at 7:21 am and sunset at 7:14 pm EDT.

Sunshine

The average sunshine in September is 8.6h.

UV index

In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, the maximum UV index of 6 translates into these guidelines:
Fend off overexposure. Sun protection is vital. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.