September weather forecast
Hollywood, FL

The shift from August to September in Hollywood brings a slight decrease in temperature, but the weather continues to be sweaty and humid. The city starts experiencing reduction in daylight hours and a diminished UV index. The sea temperature begins to drop slightly, signaling the upcoming end of summer. September remains wet, receiving a total of 7.68" (195mm) of rainfall.

Temperature

Upon the beginning of September, Hollywood's high-temperatures register at a still tropical 86.2°F (30.1°C), closely mirroring the preceding month. In Hollywood, the September nights are characterized by an average low-temperature of 80.4°F (26.9°C), a minor dip from daytime readings.

Heat index

For most parts of September, the heat index is calculated to be a fiery hot 96.8°F (36°C). Undertake enhanced precautions, heat exhaustion and heat cramps are possible risks. Continuous activity could trigger heatstroke.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

The average relative humidity in September is 73%.

Rainfall

In September, the rain falls for 26.9 days. Throughout September, 7.68" (195mm) of precipitation is accumulated. In Hollywood, during the entire year, the rain falls for 240.3 days and collects up to 50.75" (1289mm) of precipitation.

Ocean temperature

In Hollywood, in September, the average water temperature is 85.1°F (29.5°C).
Note: Temperatures between 77°F (25°C) and 84.2°F (29°C) are ideal for swimming, diving, and similar water activities, ensuring pleasure and comfort for extended periods without feeling uneasy.

Daylight

In Hollywood, the average length of the day in September is 12h and 18min.
On the first day of the month, sunrise is at 7:01 am and sunset at 7:39 pm. On the last day of September, in Hollywood, sunrise is at 7:12 am and sunset at 7:07 pm EDT.

Sunshine

The average sunshine in September is 9h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: The daily high UV index of 7 in September translates into this advice:
Deter overexposure. Protecting against the sun's effects is essential. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Heed this! UV intensity is much stronger when reflected off sand and water.