September weather forecast
Boca Raton, FL

The Atlantic ocean surrounding the fantastic city of Boca Raton, Florida
The Atlantic ocean surrounding the fantastic city of Boca Raton, Florida

Weather in September

The first month of the autumn, September, is still a warm month in Boca Raton, Florida, with an average temperature ranging between max 85.3°F (29.6°C) and min 80.2°F (26.8°C).

Temperature

In Boca Raton, the average high-temperature in September is practically the same as in August - a warm 85.3°F (29.6°C). In September, the average low-temperature is 80.2°F (26.8°C).

Heat index

In September, the average heat index is computed to be a sweltering 95°F (35°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'real feel', 'feels like', 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 subjective, depending on the activity and individual's heat perception influenced by various reasons (wind, clothing, differences in body mass, height, and shape). Bear in mind that direct sunshine exposure increases weather impact, and may raise 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.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 99.5°F (37.5°C) to 100.9°F (38.3°C), thermal conditions are potentially life-threatening.

Humidity

In September, the average relative humidity in Boca Raton is 74%.

Rainfall

In September, in Boca Raton, the rain falls for 27.8 days. Throughout September, 10.59" (269mm) of precipitation is accumulated. In Boca Raton, Florida, during the entire year, the rain falls for 244.6 days and collects up to 68.54" (1741mm) of precipitation.

Ocean temperature

In September, the average ocean temperature is 85.1°F (29.5°C).
Note: 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.

Daylight

In Boca Raton, the average length of the day in September is 12h and 18min.
On the first day of the month, sunrise is at 7:00 am and sunset at 7:40 pm. On the last day of September, sunrise is at 7:12 am and sunset at 7:08 pm EDT.

Sunshine

The average sunshine in September in Boca Raton is 9h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in Boca Raton, Florida. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The average daily UV index of 7 in September transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for the 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. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in September in Boca Raton?

The average high-temperature, in September, in Boca Raton, is 85.3°F (29.6°C), while the average low-temperature is 80.2°F (26.8°C). in September, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines air temperature and relative humidity, is computed to be 95°F (35°C).

What is the average humidity in September in Boca Raton?

The average relative humidity in September in Boca Raton, Florida, is 74%.

How many days does it rain in September in Boca Raton?

In Boca Raton, in September, during 27.8 rainfall days, 10.59" (269mm) of precipitation is typically accumulated.

What is the ocean temperature in September in Boca Raton?

In Boca Raton, Florida, in September, the average water temperature is 85.1°F (29.5°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.

What is the average length of the day in September in Boca Raton?

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

When is the sunrise / sunset in September in Boca Raton?

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 7:12 am and sunset at 7:08 pm EDT.

How long on average sun shines in September in Boca Raton?

The average sunshine duration in September is 9h.

What is the month with the highest UV index in Boca Raton?

May through September, with an average maximum UV index of 7, are months with the highest UV index in Boca Raton, Florida.

How high is the UV index in September in Boca Raton?

The average daily maximum UV index in September in Boca Raton, Florida, is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to Sun's UV rays.

Average temperature in September
Boca Raton, FL

Average temperature in September - Boca Raton, FL
  • Average high temperature in September: 85.3°F

The warmest month (with the highest average high temperature) is August (87.1°F).
The month with the lowest average high temperature is January (72.5°F).

  • Average low temperature in September: 80.2°F

The month with the highest average low temperature is August (81.5°F).
The coldest month (with the lowest average low temperature) is January (64.2°F).

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Average pressure in September
Boca Raton, FL

Average pressure in September - Boca Raton, FL
  • Average pressure in September: 29.95"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is September (29.95"Hg).

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Average wind speed in September
Boca Raton, FL

Average wind speed in September - Boca Raton, FL
  • Average wind speed in September: 8.4mph

The windiest month (with the highest average wind speed) is March (11.4mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).

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Average humidity in September
Boca Raton, FL

Average humidity in September - Boca Raton, FL
  • Average humidity in September: 74%

The months with the highest relative humidity are June and December (75%).
The month with the lowest relative humidity is March (70%).

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Average rainfall in September
Boca Raton, FL

Average rainfall in September - Boca Raton, FL
  • Average rainfall in September: 10.59"

The wettest month (with the highest rainfall) is August (12.05").
The driest month (with the least rainfall) is January (1.57").

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Average rainfall days in September
Boca Raton, FL

Average rainfall days in September - Boca Raton, FL
  • Average rainfall days in September: 27.8 days

The month with the highest number of rainy days is August (29.3 days).
The month with the least rainy days is February (12.7 days).

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Average sea temperature in September
Boca Raton, FL

Average sea temperature in September - Boca Raton, FL
  • Average sea temperature in September: 85.1°F

The best month for swimming (with the highest average sea temperature) is August (86.3°F).
The coldest months (with the lowest average sea temperature) are January and February (74.2°F).

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Average daylight in September /
Average sunshine in September
Boca Raton, FL

Average daylight in September / Average sunshine in September - Boca Raton, FL
  • Average daylight in September: 12h and 18min

The month with the longest days is June (Average daylight: 13h and 46min).
The month with the shortest days is December (Average daylight: 10h and 31min).

  • Average sunshine in September: 9h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are January and December (Average sunshine: 6h and 12min).

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Average sunshine days in September
Boca Raton, FL

Average sunshine days in September - Boca Raton, FL
  • Average sunshine days in September: 1.4 days

The month with the most sunshine days is March (13.3 days).
The month with the least sunshine days is August (0.9 days).

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Average UV index in September
Boca Raton, FL

Average UV index in September - Boca Raton, 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 month with the lowest UV index is January (UV index 5).

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Average cloud cover in September
Boca Raton, FL

Average cloud cover in September - Boca Raton, FL
  • Average cloud cover in September: 31

The month with the most cloud cover is October (Cloud cover 36).
The months with the least cloud cover are March, April, May and July (Cloud cover 29).

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Average visibility in September
Boca Raton, FL

Average visibility in September - Boca Raton, 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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