September weather forecast
Highland Park, FL

The first month of the autumn, September, is still a hot month in Highland Park, Florida, with an average temperature fluctuating between 87.8°F (31°C) and 73.9°F (23.3°C).

Temperature

September commences with an average high-temperature of a still hot 87.8°F (31°C), showing little deviation from August's 90°F (32.2°C). Throughout September, Highland Park anticipates an average low-temperature of 73.9°F (23.3°C).

Heat index

September's mean heat index is calculated to be a blistering 105.8°F (41°C). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.
Be aware that heat index ratings are designed for shaded locations and minor breezes. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a metric representing the sensation of warmth when air temperature and moisture come together. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values hold particular 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.
Perspiration is the body's default response to elevated temperatures, as it promotes the evaporation of sweat to achieve cooling. In high relative humidity, the body's ability to evaporate heat is diminished, resulting in a heightened feeling of warmth. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

September is the most humid month, with an average relative humidity of 80%.

Rainfall

In Highland Park, in September, it is raining for 23.9 days, with typically 4.53" (115mm) of accumulated precipitation. In Highland Park, during the entire year, the rain falls for 205 days and collects up to 41.3" (1049mm) of precipitation.

Daylight

In September, the average length of the day is 12h and 19min.
On the first day of the month, sunrise is at 7:05 am and sunset at 7:46 pm. On the last day of September, sunrise is at 7:18 am and sunset at 7:13 pm EDT.

Sunshine

In September, the average sunshine is 8.7h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The daily maximum UV index of 7 in September interprets into the following advice:
Inhibit overexposure. Warding off sun damage is of utmost importance. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. To cut down UV radiation exposure by about half, sport a wide-brim hat.