September weather forecast
Tampa, FL

The Hillsborough River flowing under the bridge in Tampa, Florida
The Hillsborough River flowing under the bridge in Tampa, Florida

Weather in September

The first month of the autumn, September, is also a hot month in Tampa, Florida, with temperature in the range of an average high of 88.7°F (31.5°C) and an average low of 76.1°F (24.5°C).

Temperature

In Tampa, the average high-temperature in September is almost the same as in August - a still tropical 88.7°F (31.5°C). In September, the average low-temperature is 76.1°F (24.5°C).

Heat index

In September, the average heat index is appraised at a blistering 104°F (40°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 'apparent temperature', 'real feel', 'feels like', or 'felt air temperature', 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, clothing, metabolic differences). 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 particularly important for children. 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.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. 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. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

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

Rainfall

In September, in Tampa, the rain falls for 21.2 days. Throughout September, 3.9" (99mm) of precipitation is accumulated. In Tampa, during the entire year, the rain falls for 178.2 days and collects up to 32.87" (835mm) of precipitation.

Ocean temperature

In Tampa, in September, the average water temperature is 84.4°F (29.1°C).
Note: 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.

Daylight

In Tampa, Florida, the average length of the day in September is 12h and 19min.
On the first day of September, sunrise is at 7:08 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 7:17 pm EDT.

Sunshine

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

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in Tampa. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, the average maximum UV index of 7 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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 Tampa?

The average high-temperature, in September, in Tampa, is 88.7°F (31.5°C), while the average low-temperature is 76.1°F (24.5°C). The average heat index (a.k.a. 'real feel', 'feels like'), which combines relative humidity and air temperature, in September is appraised at 104°F (40°C).

What is the average humidity in September in Tampa?

The average relative humidity in September in Tampa is 74%.

How many days does it rain in September in Tampa?

In Tampa, during September, the rain falls for 21.2 days and regularly aggregates up to 3.9" (99mm) of precipitation.

How warm is the water in September in Tampa?

In September, the average ocean temperature is 84.4°F (29.1°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 Tampa have in September?

The average day length in September in Tampa, Florida, is 12h and 19min.

What time are sunrise and sunset in September in Tampa?

In September, on the first day of the month, sunrise is at 7:08 am and sunset at 7:51 pm. On the last day of the month, in Tampa, sunrise is at 7:22 am and sunset at 7:17 pm EDT.

How many hours of sunshine does Tampa have in September?

In Tampa, the average sunshine duration in September is 8.9h.

What is the month with the highest UV index in Tampa?

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

What is the UV index intensity in September in Tampa?

The average daily maximum UV index in September in Tampa, Florida, is 7. A UV Index reading of 6 to 7 represents a high hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Tampa, FL

Average temperature in September - Tampa, 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 (67.8°F).

  • Average low temperature in September: 76.1°F

The month with the highest average low temperature is August (79°F).
The coldest month (with the lowest average low temperature) is January (53.4°F).

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Average pressure in September
Tampa, FL

Average pressure in September - Tampa, FL
  • Average pressure in September: 29.96"Hg

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

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Average wind speed in September
Tampa, FL

Average wind speed in September - Tampa, FL
  • Average wind speed in September: 6.2mph

The windiest month (with the highest average wind speed) is March (7.8mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).

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Average humidity in September
Tampa, FL

Average humidity in September - Tampa, FL
  • Average humidity in September: 74%

The month with the highest relative humidity is December (75%).
The month with the lowest relative humidity is May (69%).

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Average rainfall in September
Tampa, FL

Average rainfall in September - Tampa, FL
  • Average rainfall in September: 3.9"

The wettest month (with the highest rainfall) is July (5.67").
The driest month (with the least rainfall) is November (1.26").

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Average rainfall days in September
Tampa, FL

Average rainfall days in September - Tampa, FL
  • Average rainfall days in September: 21.2 days

The month with the highest number of rainy days is August (25.3 days).
The month with the least rainy days is November (8.2 days).

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Average sea temperature in September
Tampa, FL

Average sea temperature in September - Tampa, FL
  • Average sea temperature in September: 84.4°F

The best month for swimming (with the highest average sea temperature) is August (86.5°F).
The coldest month (with the lowest average sea temperature) is January (64.8°F).

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

Average daylight in September / Average sunshine in September - Tampa, FL
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is May (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).

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Average sunshine days in September
Tampa, FL

Average sunshine days in September - Tampa, FL
  • Average sunshine days in September: 6.9 days

The month with the most sunshine days is November (20.3 days).
The months with the least sunshine days are July and August (4.3 days).

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Average UV index in September
Tampa, FL

Average UV index in September - Tampa, 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 4).

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Average cloud cover in September
Tampa, FL

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

The months with the most cloud cover are January and December (Cloud cover 33).
The month with the least cloud cover is May (Cloud cover 24).

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Average visibility in September
Tampa, FL

Average visibility in September - Tampa, 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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