September weather forecast
Palm Beach, FL

With the arrival of September, Palm Beach begins to slightly break away from the intense summer months. There is a moderate reduction in maximum temperature to 84.7°F (29.3°C). October foresees further decrease in temperature and precipitation, signaling the end of the rainy, humid spell. Visitors in September can enjoy Florida's lush scenery, serene beaches, and dazzling sunsets devoid of the summer's intense heat.

Temperature

The advent of September signifies a minor shift to an average high-temperature of a moderately hot 84.7°F (29.3°C), aligning closely with August. Palm Beach, during September nights, witnesses an average temperature marginally cooler than its daytime highs, at 80.4°F (26.9°C).

Heat index

In September, the average heat index is evaluated at a hot 93.2°F (34°C). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', measures the perceived warmth when incorporating the humidity present in the air. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.

Humidity

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

Rainfall

In Palm Beach, in September, during 25 rainfall days, 2.87" (73mm) of precipitation is typically accumulated. In Palm Beach, during the entire year, the rain falls for 193.9 days and collects up to 22.56" (573mm) of precipitation.

Ocean temperature

In Palm Beach, Florida, the average seawater temperature in September is 84.7°F (29.3°C).
Note: Engaging in water activities, such as swimming or diving, in temperatures from 77°F (25°C) to 84.2°F (29°C) is very pleasurable for extended periods, without any discomfort.

Daylight

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

Sunshine

In September, the average sunshine is 9h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in Palm Beach, Florida. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum daily UV index of 7 in September converts into the following recommendations:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Stay cautious! Sand and water reflections increase UV radiation potency.