September weather forecast
Palm Beach, FL

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The famous Palm Beach in Florida, a panorama of the rest of the city, the beautiful blue water, and white sand
The famous Palm Beach in Florida, a panorama of the rest of the city, the beautiful blue water, and white sand

Weather in September

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.
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Frequently asked questions

How hot is it in Palm Beach in September?

In Palm Beach, 84.7°F (29.3°C) is the average high-temperature and 80.4°F (26.9°C) is the average low-temperature during September. In September, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which represents the influence of relative humidity on air temperature, is evaluated at 93.2°F (34°C).

What is the average humidity in September in Palm Beach?

The average relative humidity in September in Palm Beach, Florida, is 75%.

How much does it rain in Palm Beach in September?

In Palm Beach, during September, the rain falls for 25 days and regularly aggregates up to 2.87" (73mm) of precipitation.

What is the water temperature in September in Palm Beach?

In Palm Beach, in September, the average water temperature is 84.7°F (29.3°C). For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

How many hours of daylight does Palm Beach have in September?

In Palm Beach, Florida, the average day length in September is 12h and 18min.

When is the sunrise / sunset in September in Palm Beach?

On the first day of September in Palm Beach, Florida, 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.

How many hours of sunshine does Palm Beach have in September?

In Palm Beach, Florida, the average sunshine duration in September is 9h.

When is the highest UV index in Palm Beach?

The months with the highest UV index in Palm Beach are May through September, with an average maximum UV index of 7.

What is the UV index reading in September in Palm Beach?

In Palm Beach, the average daily maximum UV index in September is 7. A UV Index value of 6 to 7 symbolizes a high health threat from unprotected exposure to UV radiation.

Average temperature in September
Palm Beach, FL

Average temperature in September - Palm Beach, FL
  • Average high temperature in September: 84.7°F

The warmest month (with the highest average high temperature) is August (86.5°F).
The month with the lowest average high temperature is January (72°F).

  • Average low temperature in September: 80.4°F

The month with the highest average low temperature is August (81.3°F).
The coldest month (with the lowest average low temperature) is January (64.2°F).

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Average pressure in September
Palm Beach, FL

Average pressure in September - Palm Beach, FL
  • Average pressure in September: 29.96"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are September and October (29.96"Hg).

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Average wind speed in September
Palm Beach, FL

Average wind speed in September - Palm Beach, FL
  • Average wind speed in September: 8.8mph

The windiest month (with the highest average wind speed) is March (11.8mph).
The calmest month (with the lowest average wind speed) is July (8mph).

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Average humidity in September
Palm Beach, FL

Average humidity in September - Palm Beach, FL
  • Average humidity in September: 75%

The month with the highest relative humidity is June (76%).
The month with the lowest relative humidity is March (70%).

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Average rainfall in September
Palm Beach, FL

Average rainfall in September - Palm Beach, FL
  • Average rainfall in September: 2.87"

The wettest month (with the highest rainfall) is August (4.13").
The driest month (with the least rainfall) is January (0.51").

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Average rainfall days in September
Palm Beach, FL

Average rainfall days in September - Palm Beach, FL
  • Average rainfall days in September: 25 days

The month with the highest number of rainy days is September (25 days).
The month with the least rainy days is February (9.3 days).

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Average sea temperature in September
Palm Beach, FL

Average sea temperature in September - Palm Beach, FL
  • Average sea temperature in September: 84.8°F

The best month for swimming (with the highest average sea temperature) is August (85.7°F).
The coldest month (with the lowest average sea temperature) is January (74.1°F).

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Average daylight in September /
Average sunshine in September
Palm Beach, FL

Average daylight in September / Average sunshine in September - Palm Beach, FL
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).

  • Average sunshine in September: 9h and 0min

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The months with the least sunshine are January and December (Average sunshine: 6h and 6min).

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Average sunshine days in September
Palm Beach, FL

Average sunshine days in September - Palm Beach, FL
  • Average sunshine days in September: 3.6 days

The month with the most sunshine days is January (18.2 days).
The month with the least sunshine days is August (3.5 days).

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Average UV index in September
Palm Beach, FL

Average UV index in September - Palm Beach, FL
  • Average UV index in September: 7

The months with the highest UV index are May, June, July, August and September (UV index 7).
The months with the lowest UV index are January and February (UV index 5).

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Average cloud cover in September
Palm Beach, FL

Average cloud cover in September - Palm Beach, FL
  • Average cloud cover in September: 31

The months with the most cloud cover are January, November and December (Cloud cover 35).
The months with the least cloud cover are May, July and August (Cloud cover 28).

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Average visibility in September
Palm Beach, FL

Average visibility in September - Palm Beach, FL
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Palm Beach, Florida, USA

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