September weather forecast and climate
Saint Pete Beach, FL

Weather in September

The first month of the autumn, September, is still a tropical month in Saint Pete Beach, Florida, with average temperature ranging between min 77.9°F (25.5°C) and max 86.5°F (30.3°C).

Temperature

In September, the average high-temperature is practically the same as in August - a still hot 86.5°F (30.3°C). In September, in Saint Pete Beach, the average low-temperature is 77.9°F (25.5°C).

Heat index

The average heat index is appraised at a torrid 98.4°F (36.9°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. 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', 'apparent temperature', 'felt air temperature', or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Additional factors like activity, pregnancy, metabolic differences, and wind affect individual temperature impact. 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.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. 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 September, the average relative humidity is 74%.

Rainfall

In Saint Pete Beach, it is raining for 6.5 days, with typically 0.24" (6mm) of accumulated precipitation. In Saint Pete Beach, during the entire year, the rain falls for 60.4 days and collects up to 5.16" (131mm) of precipitation.

Ocean temperature

In Saint Pete Beach, in September, the average water temperature is 84.7°F (29.3°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

The average length of the day in Saint Pete Beach is 12.3h.

Sunshine

In Saint Pete Beach, the average sunshine in September is 9.3h.

UV index

Months with the highest UV index in Saint Pete Beach 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 unprotected exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 7 interpret into the following advice:
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 reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the temperature in September in Saint Pete Beach?

In Saint Pete Beach, in September, the average high-temperature is 86.5°F (30.3°C), and the average low-temperature is 77.9°F (25.5°C). The average heat index (a.k.a. 'feels like', 'real feel'), which combines air temperature and relative humidity, in September is appraised at 98.4°F (36.9°C).

What is the average humidity in September in Saint Pete Beach?

In Saint Pete Beach, Florida, the average relative humidity in September is 74%.

How many days does it rain in September in Saint Pete Beach?

In Saint Pete Beach, Florida, in September, during 6.5 rainfall days, 0.24" (6mm) of precipitation is typically accumulated.

How warm is the water in September in Saint Pete Beach?

In Saint Pete Beach, the average seawater temperature in September is 84.7°F (29.3°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.

What is the average length of the day in September in Saint Pete Beach?

In Saint Pete Beach, the average length of the day in September is 12.3h.

How many hours of sunshine does Saint Pete Beach have in September?

In September, the average sunshine in Saint Pete Beach, Florida, is 9.3h.

What are the months with the highest UV index in Saint Pete Beach?

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

What is the UV index intensity in September in Saint Pete Beach?

The average daily maximum UV index in September in Saint Pete Beach is 7. A UV Index of 6 to 7 symbolizes a high health threat from the exposure to the Sun's UV rays.

Average temperature in September
Saint Pete Beach, FL

Average temperature in September - Saint Pete Beach, FL
  • Average high temperature in September: 86.5°F

The warmest month (with the highest average high temperature) is August (87.8°F).
The month with the lowest average high temperature is January (66.7°F).

  • Average low temperature in September: 77.9°F

The month with the highest average low temperature is August (80.6°F).
The coldest month (with the lowest average low temperature) is January (56.7°F).

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Average pressure in September
Saint Pete Beach, FL

Average pressure in September - Saint Pete Beach, FL
  • Average pressure in September: 29.96"

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is September (29.96").

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Average wind speed in September
Saint Pete Beach, FL

Average wind speed in September - Saint Pete Beach, FL
  • Average wind speed in September: 8mph

The windiest months (with the highest average wind speed) are January and November (10.1mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).

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Average humidity in September
Saint Pete Beach, FL

Average humidity in September - Saint Pete Beach, FL
  • Average humidity in September: 74%

The month with the highest relative humidity is December (77%).
Months with the lowest relative humidity are March, May and October (73%).

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Average rainfall in September
Saint Pete Beach, FL

Average rainfall in September - Saint Pete Beach, FL
  • Average rainfall in September: 0.24"

The wettest month (with the highest rainfall) is July (0.98").
The driest month (with the least rainfall) is March (0.08").

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Average rainfall days in September
Saint Pete Beach, FL

Average rainfall days in September - Saint Pete Beach, FL
  • Average rainfall days in September: 6.5 days

The month with the highest number of rainy days is July (8.8 days).
The month with the least rainy days is January (2.6 days).

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Average sea temperature in September
Saint Pete Beach, FL

Average sea temperature in September - Saint Pete Beach, FL
  • Average sea temperature in September: 84.7°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°F).

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Average daylight in September /
Average sunshine in September
Saint Pete Beach, FL

Average daylight in September / Average sunshine in September - Saint Pete Beach, 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: 9.3h

The month with the most sunshine is May (Average sunshine: 11.3h).
The month with the least sunshine is December (Average sunshine: 6.7h).

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Average sunshine days in September
Saint Pete Beach, FL

Average sunshine days in September - Saint Pete Beach, FL
  • Average sunshine days in September: 14.7 days

The month with the most sunshine days is March (27.6 days).
The month with the least sunshine days is August (13.5 days).

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Average UV index in September
Saint Pete Beach, FL

Average UV index in September - Saint Pete Beach, 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
Saint Pete Beach, FL

Average cloud cover in September - Saint Pete Beach, FL
  • Average cloud cover in September: 26

Months with the most cloud cover are January and December (Cloud cover 29).
The month with the least cloud cover is May (Cloud cover 20).

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Average visibility in September
Saint Pete Beach, FL

Average visibility in September - Saint Pete Beach, 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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