September weather forecast
South Palm Beach, FL

September, the first month of the autumn in South Palm Beach, is also a moderately hot month, with an average temperature varying between 80.1°F (26.7°C) and 85.1°F (29.5°C).

Temperature

September's advent presents an average high-temperature of a moderately hot 85.1°F (29.5°C), indicating a slight variation from the conditions of the previous month. A modest dip in temperatures to an average of 80.1°F (26.7°C) is observed throughout South Palm Beach's September nights.

Heat index

September's mean heat index is calculated to be a very hot 95°F (35°C). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.
It is crucial to understand that heat index figures are for shade and gentle wind conditions. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', arises from combining readings of air temperature and relative moisture content. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

In South Palm Beach, the average relative humidity in September is 75%.

Rainfall

In South Palm Beach, in September, during 26.8 rainfall days, 7.48" (190mm) of precipitation is typically accumulated. Throughout the year, in South Palm Beach, there are 238.3 rainfall days, and 54.53" (1385mm) of precipitation is accumulated.

Ocean temperature

In South Palm Beach, in September, the average water temperature is 84.7°F (29.3°C).
Note: In water temperatures ranging between 77°F (25°C) and 84.2°F (29°C), activities such as swimming and diving become highly pleasurable for long durations.

Daylight

In September, the average length of the day in South Palm Beach, Florida, is 12h and 18min.
On the first day of the month, sunrise is at 7:00 am and sunset at 7:39 pm. On the last day of September, sunrise is at 7:12 am and sunset at 7:07 pm EDT.

Sunshine

In South Palm Beach, the average sunshine in September is 8.9h.

UV index

The months with the highest UV index in South Palm Beach are May through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum daily UV index, 7 in September, converts into the following recommendations:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. 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. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Stay aware! UV radiation is magnified when reflecting off sand and water.