September weather forecast and climate
Brandon, FL

The first month of the autumn, September, is also a hot month in Brandon, Florida, with temperature in the range of an average low of 74.8°F (23.8°C) and an average high of 88.7°F (31.5°C).

Temperature

In Brandon, Florida, the average high-temperature in September is practically the same as in August - a still hot 88.7°F (31.5°C). In Brandon, Florida, the average low-temperature is 74.8°F (23.8°C).

Heat index

In September, the average heat index is appraised at an extremely hot 106°F (41.1°C). Be wary - heat exhaustion and heat cramps are highly anticipated. With continued activity, heatstroke is very likely.
Note that heat index values are valued for light wind and location in the shade. 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', 'feels like', 'apparent temperature', or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (differences in body mass, height, and shape, metabolic differences, clothing). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, 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.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. 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

Months with the highest humidity are August, September and December, with an average relative humidity of 76%.

Rainfall

In Brandon, in September, during 19.6 rainfall days, 1.65" (42mm) of precipitation is typically accumulated. In Brandon, during the entire year, the rain falls for 160.9 days and collects up to 16.77" (426mm) of precipitation.

Daylight

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

Sunshine

In Brandon, the average sunshine in September is 8.9h.

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 health hazard from the exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 7 in September transform into the following instructions:
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.

What is the temperature in September in Brandon?

The average high-temperature, in September, in Brandon, Florida, is 88.7°F (31.5°C), while the average low-temperature is 74.8°F (23.8°C). In September, the average heat index (a.k.a. 'feels like', 'felt air temperature'), that combines air temperature and relative humidity, is appraised at 106°F (41.1°C).

What are the most humid months in Brandon?

Months with the highest humidity in Brandon, Florida, are August, September and December, with an average relative humidity of 76%.

What is the average humidity in September in Brandon?

The average relative humidity in September in Brandon is 76%.

How many days does it rain in September in Brandon?

In September, in Brandon, the rain falls for 19.6 days. Throughout September, 1.65" (42mm) of precipitation is accumulated.

How many hours of daylight does Brandon have in September?

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

How long on average sun shines in September in Brandon?

The average sunshine in September in Brandon, Florida, is 8.9h.

When is the highest UV index in Brandon?

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

What is the UV index reading in September in Brandon?

In September, the average daily maximum UV index in Brandon, Florida, is 7. A UV Index reading of 6 to 7 represents a high health threat from unprotected exposure to the UV radiation.
Average temperature in September - Brandon, FL
  • Average high temperature in September: 88.7°F

The warmest month (with the highest average high temperature) is August (90.3°F).
The month with the lowest average high temperature is January (68.5°F).

  • Average low temperature in September: 74.8°F

The month with the highest average low temperature is August (77.4°F).
The coldest month (with the lowest average low temperature) is January (52.3°F).

Average pressure in September - Brandon, FL
  • Average pressure in September: 29.96"

The month with the highest atmospheric pressure is January (30.14").
The month with the lowest atmospheric pressure is September (29.96").

Average wind speed in September - Brandon, FL
  • Average wind speed in September: 5.5mph

The windiest month (with the highest average wind speed) is March (7.2mph).
The calmest month (with the lowest average wind speed) is July (5.1mph).

Average humidity in September - Brandon, FL
  • Average humidity in September: 76%

Months with the highest relative humidity are August, September and December (76%).
Months with the lowest relative humidity are March and May (70%).

Average rainfall in September - Brandon, FL
  • Average rainfall in September: 1.65"

The wettest month (with the highest rainfall) is July (3.23").
The driest month (with the least rainfall) is March (0.35").

Average rainfall days in September - Brandon, FL
  • Average rainfall days in September: 19.6 days

The month with the highest number of rainy days is July (24 days).
The month with the least rainy days is January (5.8 days).

Average daylight in September / Average sunshine in September - Brandon, 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: 8.9h

The month with the most sunshine is May (Average sunshine: 10.9h).
The month with the least sunshine is December (Average sunshine: 6.3h).

Average sunshine days in September - Brandon, FL
  • Average sunshine days in September: 8.3 days

The month with the most sunshine days is January (23.1 days).
The month with the least sunshine days is July (4.5 days).

Average UV index in September - Brandon, 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).

Average cloud cover in September - Brandon, FL
  • Average cloud cover in September: 30

Months with the most cloud cover are January, February and December (Cloud cover 32).
The month with the least cloud cover is May (Cloud cover 24).

Average visibility in September - Brandon, 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).