September weather forecast
Holly Hill, FL

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

Temperature

Holly Hill marks the start of September with an average high-temperature of a still tropical 86.2°F (30.1°C), hinting at a slight fluctuation from August's 89.2°F (31.8°C). September nights are marked by an average temperature drop to a moderately hot 75.9°F (24.4°C).

Heat index

During September, the heat index is estimated at a fiery hot 98.6°F (37°C). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.
The heat index's values are generally associated with conditions in shade and light breezes. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'real feel' or 'apparent temperature', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

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

Rainfall

In Holly Hill, in September, during 22.1 rainfall days, 4.96" (126mm) of precipitation is typically accumulated. Throughout the year, there are 196 rainfall days, and 37.91" (963mm) of precipitation is accumulated.

Daylight

In September, the average length of the day in Holly Hill, Florida, is 12h and 20min.
On the first day of September in Holly Hill, Florida, 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

The average sunshine in September in Holly Hill, Florida, is 8.8h.

UV index

In Holly Hill, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum daily UV index of 6 during September translates into the following directions:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Always opt for UVA and UVB-resistant sunglasses on radiant days.