September weather forecast and climate
Bradenton, FL

Beautiful clear water and white sand of the busy Coquina Beach in Brandenton, Florida
Beautiful clear water and white sand of the busy Coquina Beach in Brandenton, Florida

Weather in September

September, the first month of the autumn, in Bradenton, is still a tropical month, with average temperature varying between 86.9°F (30.5°C) and 77.4°F (25.2°C).

Temperature

In September, the average high-temperature is essentially the same as in August - a still tropical 86.9°F (30.5°C). In Bradenton, Florida, in September, the average low-temperature is 77.4°F (25.2°C).

Heat index

In September, the average heat index is calculated to be a sweltering 99.9°F (37.7°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. 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 'real feel', 'feels like', 'apparent temperature', or 'felt air temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (pregnancy, metabolic differences, wind). 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. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. 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 Bradenton, the average relative humidity is 75%.

Rainfall

In Bradenton, during September, the rain falls for 23.5 days and regularly aggregates up to 4.61" (117mm) of precipitation. In Bradenton, during the entire year, the rain falls for 183.1 days and collects up to 34.92" (887mm) of precipitation.

Ocean temperature

In Bradenton, Florida, the average seawater temperature 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 Bradenton, the average length of the day in September is 12.3h.

Sunshine

In Bradenton, the average sunshine in September is 9h.

UV index

Months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from unsafe exposure to the UV radiation for the ordinary person.
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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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 Bradenton?

The average high-temperature, in September, is 86.9°F (30.5°C), while the average low-temperature is 77.4°F (25.2°C). In September, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 99.9°F (37.7°C).

What is the average humidity in September in Bradenton?

In September, the average relative humidity is 75%.

How many days does it rain in September in Bradenton?

In Bradenton, Florida, during September, the rain falls for 23.5 days and regularly aggregates up to 4.61" (117mm) of precipitation.

What is the water temperature in September in Bradenton?

In Bradenton, Florida, the average seawater temperature in September is 84.7°F (29.3°C). 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.

What is the average length of the day in September in Bradenton?

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

How long on average sun shines in September in Bradenton?

The average sunshine in September in Bradenton, Florida, is 9h.

When is the highest UV index in Bradenton?

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

What is the UV index reading in September in Bradenton?

In Bradenton, the average daily maximum UV index in September is 7. A UV Index value of 6 to 7 symbolizes a high hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in September
Bradenton, FL

Average temperature in September - Bradenton, FL
  • Average high temperature in September: 86.9°F

The warmest month (with the highest average high temperature) is August (88.5°F).
The month with the lowest average high temperature is January (68.5°F).

  • Average low temperature in September: 77.4°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 (56.1°F).

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Average pressure in September
Bradenton, FL

Average pressure in September - Bradenton, FL
  • Average pressure in September: 29.95"

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is September (29.95").

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Average wind speed in September
Bradenton, FL

Average wind speed in September - Bradenton, FL
  • Average wind speed in September: 7.2mph

The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is July (6.4mph).

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Average humidity in September
Bradenton, FL

Average humidity in September - Bradenton, FL
  • Average humidity in September: 75%

The month with the highest relative humidity is December (76%).
Months with the lowest relative humidity are March, April and May (72%).

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Average rainfall in September
Bradenton, FL

Average rainfall in September - Bradenton, FL
  • Average rainfall in September: 4.61"

The wettest month (with the highest rainfall) is August (6.42").
The driest months (with the least rainfall) are February and November (1.06").

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Average rainfall days in September
Bradenton, FL

Average rainfall days in September - Bradenton, FL
  • Average rainfall days in September: 23.5 days

The month with the highest number of rainy days is August (26.8 days).
Months with the least rainy days are January, February and November (8.3 days).

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Average sea temperature in September
Bradenton, FL

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

The best month for swimming (with the highest average sea temperature) is August (86.7°F).
The coldest month (with the lowest average sea temperature) is January (64.1°F).

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Average daylight in September /
Average sunshine in September
Bradenton, FL

Average daylight in September / Average sunshine in September - Bradenton, FL
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 13.9h).
The month with the shortest days is December (Average daylight: 10.4h).

  • Average sunshine in September: 9h

The month with the most sunshine is May (Average sunshine: 11.1h).
The month with the least sunshine is December (Average sunshine: 6.5h).

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Average sunshine days in September
Bradenton, FL

Average sunshine days in September - Bradenton, FL
  • Average sunshine days in September: 4.5 days

The month with the most sunshine days is January (21.1 days).
The month with the least sunshine days is August (2.5 days).

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Average UV index in September
Bradenton, FL

Average UV index in September - Bradenton, FL
  • Average UV index in September: 7

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 4).

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Average cloud cover in September
Bradenton, FL

Average cloud cover in September - Bradenton, FL
  • Average cloud cover in September: 28

Months with the most cloud cover are January and December (Cloud cover 30).
The month with the least cloud cover is May (Cloud cover 22).

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Average visibility in September
Bradenton, FL

Average visibility in September - Bradenton, 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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