September weather forecast
Royal Palm Beach, FL

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Weather in September

The first month of the autumn, September, is still a tropical month in Royal Palm Beach, Florida, with an average temperature varying between 78.4°F (25.8°C) and 86°F (30°C).

Temperature

September begins with an average high-temperature of a still tropical 86°F (30°C), reflecting close similarity to the preceding month. September nights reflect a consistent temperature dip to a moderately hot 78.4°F (25.8°C), a slight descent from daytime peaks.

Heat index

September's heat index is calculated to be a fiery hot 98.6°F (37°C). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.
Always consider that heat index estimations are for light winds and places in the shade. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'real feel' or 'feels like', is found by incorporating humidity levels into the air temperature measurement. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
Through perspiration, the body has a natural mechanism to eliminate excessive heat via sweat evaporation. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.

Humidity

The most humid month is September, with an average relative humidity of 77%.

Rainfall

In Royal Palm Beach, Florida, in September, it is raining for 26.2 days, with typically 4.61" (117mm) of accumulated precipitation. In Royal Palm Beach, during the entire year, the rain falls for 218.6 days and collects up to 34.33" (872mm) of precipitation.

Daylight

The average length of the day in September in Royal Palm Beach is 12h and 18min.
On the first day of September, sunrise is at 7:00 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 7:08 pm EDT.

Sunshine

In September, the average sunshine is 9.1h.

UV index

The months with the highest UV index in Royal Palm Beach are May through September, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the average person.
Note: In September, the UV index of 7 transforms into the following advice:
Fend off overexposure. Sun protection is vital. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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Frequently asked questions

Is it hot in Royal Palm Beach during September?

An average high-temperature, in September, in Royal Palm Beach, is 86°F (30°C) and the average low-temperature is 78.4°F (25.8°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in September is calculated to be 98.6°F (37°C).

What is the most humid month in Royal Palm Beach?

September is the most humid month in Royal Palm Beach, Florida, with an average relative humidity of 77%.

What is the average humidity in September in Royal Palm Beach?

In September, the average relative humidity in Royal Palm Beach, Florida, is 77%.

How much does it rain in Royal Palm Beach in September?

In Royal Palm Beach, Florida, in September, it is raining for 26.2 days, with typically 4.61" (117mm) of accumulated precipitation.

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

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

What time are sunrise and sunset in September in Royal Palm Beach?

On the first day of September in Royal Palm Beach, sunrise is at 7:00 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 7:08 pm EDT.

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

The average sunshine duration in September in Royal Palm Beach, Florida, is 9.1h.

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

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

What is the UV index intensity in September in Royal Palm Beach?

In Royal Palm Beach, the average daily maximum UV index in September is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Royal Palm Beach, FL

Average temperature in September - Royal Palm Beach, FL
  • Average high temperature in September: 86°F

The warmest month (with the highest average high temperature) is August (88.2°F).
The month with the lowest average high temperature is January (72.1°F).

  • Average low temperature in September: 78.4°F

The month with the highest average low temperature is August (79.7°F).
The coldest month (with the lowest average low temperature) is January (61.3°F).

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Average pressure in September
Royal Palm Beach, FL

Average pressure in September - Royal 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
Royal Palm Beach, FL

Average wind speed in September - Royal Palm Beach, FL
  • Average wind speed in September: 7.1mph

The windiest months (with the highest average wind speed) are January and March (9.6mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).

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Average humidity in September
Royal Palm Beach, FL

Average humidity in September - Royal Palm Beach, FL
  • Average humidity in September: 77%

The month with the highest relative humidity is September (77%).
The month with the lowest relative humidity is March (69%).

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Average rainfall in September
Royal Palm Beach, FL

Average rainfall in September - Royal Palm Beach, FL
  • Average rainfall in September: 4.61"

The wettest month (with the highest rainfall) is August (5.94").
The driest month (with the least rainfall) is January (0.83").

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Average rainfall days in September
Royal Palm Beach, FL

Average rainfall days in September - Royal Palm Beach, FL
  • Average rainfall days in September: 26.2 days

The month with the highest number of rainy days is August (26.6 days).
The month with the least rainy days is January (11.3 days).

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

Average daylight in September / Average sunshine in September - Royal 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 1min

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 12min).

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Average sunshine days in September
Royal Palm Beach, FL

Average sunshine days in September - Royal Palm Beach, FL
  • Average sunshine days in September: 2.6 days

The month with the most sunshine days is January (14.7 days).
The month with the least sunshine days is August (2.1 days).

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Average UV index in September
Royal Palm Beach, FL

Average UV index in September - Royal 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
Royal Palm Beach, FL

Average cloud cover in September - Royal Palm Beach, FL
  • Average cloud cover in September: 29

The months with the most cloud cover are January, November and December (Cloud cover 34).
The months with the least cloud cover are April, May and July (Cloud cover 27).

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Average visibility in September
Royal Palm Beach, FL

Average visibility in September - Royal 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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Royal Palm Beach, Florida, USA

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