September weather forecast and climate
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 average temperature varying between 76.1°F (24.5°C) and 88.7°F (31.5°C).

Temperature

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

Heat index

The average heat index is estimated at a scorching 104.5°F (40.3°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
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 'real feel', 'feels like', 'felt air temperature', or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (differences in body mass, height, and shape, wind, metabolic differences). 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. 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. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In September, the average relative humidity is 74%.

Rainfall

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

Ocean temperature

In September, the average ocean temperature in Tampa, Florida, is 84.4°F (29.1°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 Tampa, the average length of the day in September is 12.3h.

Sunshine

In September, the average sunshine is 8.9h.

UV index

Months with the highest UV index in Tampa are May through September, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from the exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 7 transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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 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 Tampa?

In Tampa, in September, the average high-temperature is 88.7°F (31.5°C), and the average low-temperature is 76.1°F (24.5°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in September is estimated at 104.5°F (40.3°C).

What is the average humidity in September in Tampa?

The average relative humidity in September is 74%.

How many days does it rain in September in Tampa?

In Tampa, Florida, in September, during 21.2 rainfall days, 3.9" (99mm) of precipitation is typically accumulated.

What is the water temperature in September in Tampa?

In Tampa, Florida, in September, the average water temperature is 84.4°F (29.1°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.

How many hours of daylight does Tampa have in September?

The average length of the day in September is 12.3h.

How many hours of sunshine does Tampa have in September?

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

What are the months with the highest UV index in Tampa?

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

How high is the UV index in September in Tampa?

In Tampa, 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 the exposure to the Sun's UV radiation.

Average temperature in September
Tampa, FL

Average temperature in September - Tampa, FL
  • Average high temperature in September: 31.5°C

The warmest month (with the highest average high temperature) is August (32.4°C).
The month with the lowest average high temperature is January (19.9°C).

  • Average low temperature in September: 24.5°C

The month with the highest average low temperature is August (26.1°C).
The coldest month (with the lowest average low temperature) is January (11.9°C).

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Average pressure in September
Tampa, FL

Average pressure in September - Tampa, FL
  • Average pressure in September: 1014.6mbar

The month with the highest atmospheric pressure is January (1020.5mbar).
The month with the lowest atmospheric pressure is September (1014.6mbar).

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Average wind speed in September
Tampa, FL

Average wind speed in September - Tampa, FL
  • Average wind speed in September: 10km/h

The windiest month (with the highest average wind speed) is March (12.5km/h).
The calmest month (with the lowest average wind speed) is July (9.4km/h).

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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: 99mm

The wettest month (with the highest rainfall) is July (144mm).
The driest month (with the least rainfall) is November (32mm).

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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: 29.1°C

The best month for swimming (with the highest average sea temperature) is August (30.3°C).
The coldest month (with the lowest average sea temperature) is January (18.2°C).

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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: 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).

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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).
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

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

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: 10km

Months with the highest visibility are April, May, June, July, August, September, October and November (10km).
Months with the lowest visibility are January, February, March and December (9km).

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