September weather forecast
Holden Heights, FL

The first month of the autumn, September, is also a hot month in Holden Heights, Florida, with temperature in the range of an average low of 74.5°F (23.6°C) and an average high of 88.5°F (31.4°C).

Temperature

The arrival of September brings an average high-temperature of a still hot 88.5°F (31.4°C), closely following the temperature pattern of August. In Holden Heights, the average nighttime temperature during September is a warm 74.5°F (23.6°C).

Heat index

For most parts of September, the heat index is appraised at an extremely hot 105.8°F (41°C). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
For clarity, heat index numbers account for light winds and areas under shade. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'real feel' or 'felt air temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
The process of perspiration is vital for the human body to get rid of excess warmth by allowing sweat to evaporate. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

Humidity

With an average relative humidity of 77%, September is the most humid month.

Rainfall

In September, in Holden Heights, the rain falls for 15.4 days. Throughout September, 0.75" (19mm) of precipitation is accumulated. Throughout the year, there are 126.6 rainfall days, and 9.06" (230mm) of precipitation is accumulated.

Daylight

In Holden Heights, the average length of the day in September is 12h and 19min.
On the first day of the month, sunrise is at 7:04 am and sunset at 7:46 pm. On the last day of September, in Holden Heights, sunrise is at 7:18 am and sunset at 7:12 pm EDT.

Sunshine

In Holden Heights, the average sunshine in September is 8.5h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the ordinary person.
Note: An average UV index of 7 in September transforms into this advice:
Shun overexposure. Protection from sun ravages is indispensable. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.