September weather forecast
Palm Beach, FL

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

The first month of the autumn, September, is still a warm month in Palm Beach, Florida, with temperature in the range of an average low of 80.4°F (26.9°C) and an average high of 84.7°F (29.3°C).

Temperature

In Palm Beach, Florida, the average high-temperature is almost the same as in August - a moderately hot 84.7°F (29.3°C). The average low-temperature,, is 80.4°F (26.9°C).

Heat index

In September, the average heat index is estimated at a tropical 93.9°F (34.4°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'real feel', or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (pregnancy, wind, clothing), and activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In September, the average relative humidity is 75%.

Rainfall

In Palm Beach, Florida,, during 25 rainfall days, 2.87" (73mm) of precipitation is typically accumulated. Throughout the year, in Palm Beach, there are 193.9 rainfall days, and 22.56" (573mm) of precipitation is accumulated.

Ocean temperature

In Palm Beach, the average seawater temperature in September is 84.7°F (29.3°C).
Note: For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

In Palm Beach, the average length of the day in September is 12.3h.

Sunshine

In September, the average sunshine in Palm Beach, Florida, 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. A UV Index estimate of 6 to 7 represents a high health hazard from the exposure to the Sun's UV rays for average individuals.
Note: In September, the average maximum UV index of 7 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. 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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

What is the temperature in September in Palm Beach?

The average high-temperature, in September, in Palm Beach, is 84.7°F (29.3°C), while the average low-temperature is 80.4°F (26.9°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which represents the influence of relative humidity on air temperature, in September is estimated at 93.9°F (34.4°C).

What is the average humidity in September in Palm Beach?

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

How much does it rain in Palm Beach in September?

In Palm Beach, in September, it is raining for 25 days, with typically 2.87" (73mm) of accumulated precipitation.

How warm is the water in September in Palm Beach?

In September, the average ocean temperature in Palm Beach is 84.7°F (29.3°C). Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

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

In Palm Beach, the average length of the day in September is 12.3h.

How long on average sun shines in September in Palm Beach?

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

What is the month with the highest UV index in Palm Beach?

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

How high is the UV index in September in Palm Beach?

The average daily maximum UV index in September in Palm Beach, Florida, is 7. A UV Index of 6 to 7 symbolizes a high health threat from the exposure to the Sun's 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"

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

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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: 12.3h

The month with the longest days is June (Average daylight: 13.8h).
The month with the shortest days is December (Average daylight: 10.5h).

  • Average sunshine in September: 9h

The month with the most sunshine is July (Average sunshine: 11h).
Months with the least sunshine are January and December (Average sunshine: 6.1).

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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

Months with the highest UV index are May, June, July, August and September (UV index 7).
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

Months with the most cloud cover are January, November and December (Cloud cover 35).
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

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

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