September weather forecast
Cape Coral, FL

The tranquil setting of Cape Coral in Florida, with the calm sea out front and a view of the rest of the city
The tranquil setting of Cape Coral in Florida, with the calm sea out front and a view of the rest of the city

Weather in September

September, the first month of the autumn in Cape Coral, is still a hot month, with an average temperature ranging between min 77.5°F (25.3°C) and max 87.3°F (30.7°C).

Temperature

In September, the average high-temperature is practically the same as in August - a still tropical 87.3°F (30.7°C). The average low-temperature, in Cape Coral, is 77.5°F (25.3°C).

Heat index

In September, the average heat index is appraised at a torrid 101.5°F (38.6°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
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 'feels like', 'felt air temperature', 'apparent temperature', or 'real feel', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (pregnancy, differences in body mass, height, and shape, 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.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. 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

September and December, with an average relative humidity of 76%, are the most humid months in Cape Coral.

Rainfall

In Cape Coral, it is raining for 21.2 days, with typically 2.6" (66mm) of accumulated precipitation. In Cape Coral, during the entire year, the rain falls for 156.4 days and collects up to 17.95" (456mm) of precipitation.

Ocean temperature

In Cape Coral, the average water temperature is 84.9°F (29.4°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 September, the average length of the day in Cape Coral, Florida, is 12h and 18min.
On the first day of September in Cape Coral, sunrise is at 7:07 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 7:15 pm EDT.

Sunshine

In September, the average sunshine is 9.1h.

UV index

The 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 unsafe exposure to UV radiation for average 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. 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 the 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 Cape Coral?

In September, the average high-temperature is 87.3°F (30.7°C), and the average low-temperature is 77.5°F (25.3°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in September is appraised at 101.5°F (38.6°C).

What are the most humid months in Cape Coral?

The months with the highest humidity in Cape Coral, Florida, are September and December, with an average relative humidity of 76%.

What is the average humidity in September in Cape Coral?

The average relative humidity in September in Cape Coral, Florida, is 76%.

How many days does it rain in September in Cape Coral?

In September, in Cape Coral, Florida, the rain falls for 21.2 days. Throughout September, 2.6" (66mm) of precipitation is accumulated.

How warm is the water in September in Cape Coral?

In September, the average ocean temperature is 84.9°F (29.4°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 Cape Coral have in September?

In September, the average day length is 12h and 18min.

What time are sunrise and sunset in September in Cape Coral?

In September, on the first day of the month, sunrise is at 7:07 am and sunset at 7:47 pm. On the last day of the month, in Cape Coral, sunrise is at 7:19 am and sunset at 7:15 pm EDT.

How many hours of sunshine does Cape Coral have in September?

In Cape Coral, Florida, the average sunshine duration in September is 9.1h.

What is the month with the highest UV index in Cape Coral?

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

What is the UV index reading in September in Cape Coral?

The average daily maximum UV index in September in Cape Coral, Florida, is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to Sun's UV rays.

Average temperature in September
Cape Coral, FL

Average temperature in September - Cape Coral, FL
  • Average high temperature in September: 87.3°F

The warmest month (with the highest average high temperature) is August (88.9°F).
The month with the lowest average high temperature is January (70.7°F).

  • Average low temperature in September: 77.5°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 (57.7°F).

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Average pressure in September
Cape Coral, FL

Average pressure in September - Cape Coral, FL
  • Average pressure in September: 29.95"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is September (29.95"Hg).

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Average wind speed in September
Cape Coral, FL

Average wind speed in September - Cape Coral, FL
  • Average wind speed in September: 7mph

The windiest month (with the highest average wind speed) is October (8.7mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).

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Average humidity in September
Cape Coral, FL

Average humidity in September - Cape Coral, FL
  • Average humidity in September: 76%

The months with the highest relative humidity are September and December (76%).
The month with the lowest relative humidity is March (71%).

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Average rainfall in September
Cape Coral, FL

Average rainfall in September - Cape Coral, FL
  • Average rainfall in September: 2.6"

The wettest month (with the highest rainfall) is August (3.94").
The driest months (with the least rainfall) are February and March (0.43").

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Average rainfall days in September
Cape Coral, FL

Average rainfall days in September - Cape Coral, FL
  • Average rainfall days in September: 21.2 days

The month with the highest number of rainy days is August (24 days).
The month with the least rainy days is February (6.2 days).

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Average sea temperature in September
Cape Coral, FL

Average sea temperature in September - Cape Coral, FL
  • Average sea temperature in September: 84.9°F

The best month for swimming (with the highest average sea temperature) is August (86.8°F).
The coldest month (with the lowest average sea temperature) is January (67°F).

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Average daylight in September /
Average sunshine in September
Cape Coral, FL

Average daylight in September / Average sunshine in September - Cape Coral, FL
  • Average daylight in September: 12h and 18min

The month with the longest days is June (Average daylight: 13h and 47min).
The month with the shortest days is December (Average daylight: 10h and 31min).

  • Average sunshine in September: 9h and 6min

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).

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Average sunshine days in September
Cape Coral, FL

Average sunshine days in September - Cape Coral, FL
  • Average sunshine days in September: 5.8 days

The month with the most sunshine days is January (22.8 days).
The month with the least sunshine days is August (5.3 days).

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Average UV index in September
Cape Coral, FL

Average UV index in September - Cape Coral, 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
Cape Coral, FL

Average cloud cover in September - Cape Coral, FL
  • Average cloud cover in September: 28

The month with the most cloud cover is January (Cloud cover 29).
The months with the least cloud cover are March and May (Cloud cover 24).

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Average visibility in September
Cape Coral, FL

Average visibility in September - Cape Coral, 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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