September weather forecast
Holly Hill, FL

September, the first month of the autumn in Holly Hill, is still a tropical month, with an average temperature varying between 86.2°F (30.1°C) and 75.9°F (24.4°C).

Temperature

The transition into September shows a subtle variation to a still hot 86.2°F (30.1°C) from August's 89.2°F (31.8°C) in the average high-temperature. Holly Hill experiences a nighttime temperature average of 75.9°F (24.4°C) during September.

Heat index

During September, the heat index is computed to be a fiery hot 98.6°F (37°C). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
Heat index guidelines indicate values are for light wind scenarios and shaded regions. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. 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. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.

Humidity

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

Rainfall

In Holly Hill, in September, during 22.1 rainfall days, 4.96" (126mm) of precipitation is typically accumulated. In Holly Hill, during the entire year, the rain falls for 196 days and collects up to 37.91" (963mm) of precipitation.

Daylight

The average length of the day in September is 12h and 20min.
On the first day of September, sunrise is at 7:02 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 7:10 pm EDT.

Sunshine

In Holly Hill, the average sunshine in September is 8.8h.

UV index

In Holly Hill, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The UV index of 6 during September leads to these advisories:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.