September weather forecast and climate
Port Salerno, FL

Weather in September

The first month of the autumn, September, is also a moderately hot month in Port Salerno, Florida, with average temperature varying between 78.3°F (25.7°C) and 85.3°F (29.6°C).

Temperature

In Port Salerno, the average high-temperature is almost the same as in August - a moderately hot 85.3°F (29.6°C). In September, the average low-temperature is 78.3°F (25.7°C).

Heat index

In September, the average heat index is evaluated at a torrid 96.3°F (35.7°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 'real feel', 'feels like', 'felt air temperature', or 'apparent temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, wind, differences in body mass, height, and shape). 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. 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.
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. 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

In Port Salerno, the average relative humidity is 77%.

Rainfall

In Port Salerno, in September, during 22.6 rainfall days, 1.5" (38mm) of precipitation is typically accumulated. In Port Salerno, during the entire year, the rain falls for 168.1 days and collects up to 14.09" (358mm) of precipitation.

Ocean temperature

In September, the average ocean temperature is 84.4°F (29.1°C).
Note: For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

In Port Salerno, the average length of the day is 12.3h.

Sunshine

The average sunshine is 9h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high threat to health from the 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 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. 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 Port Salerno?

In September, the average high-temperature is 85.3°F (29.6°C), and the average low-temperature is 78.3°F (25.7°C). In September, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines relative humidity and air temperature, is evaluated at 96.3°F (35.7°C).

What is the average humidity in September in Port Salerno?

In Port Salerno, Florida, the average relative humidity in September is 77%.

How much does it rain in Port Salerno in September?

In Port Salerno, Florida, in September, during 22.6 rainfall days, 1.5" (38mm) of precipitation is typically accumulated.

How warm is the water in September in Port Salerno?

In September, the average ocean temperature in Port Salerno 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.

What is the average length of the day in September in Port Salerno?

The average length of the day in September in Port Salerno, Florida, is 12.3h.

How long on average sun shines in September in Port Salerno?

In September, the average sunshine in Port Salerno, Florida, is 9h.

When is the highest UV index in Port Salerno?

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

What is the UV index intensity in September in Port Salerno?

In September, the average daily maximum UV index is 7. A UV Index estimate of 6 to 7 represents a high health risk from the exposure to the Sun's UV rays.

Average temperature in September
Port Salerno, FL

Average temperature in September - Port Salerno, FL
  • Average high temperature in September: 85.3°F

The warmest month (with the highest average high temperature) is August (87.1°F).
The month with the lowest average high temperature is January (71.4°F).

  • Average low temperature in September: 78.3°F

The month with the highest average low temperature is August (79.3°F).
The coldest month (with the lowest average low temperature) is January (61.2°F).

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Average pressure in September
Port Salerno, FL

Average pressure in September - Port Salerno, FL
  • Average pressure in September: 29.96"

The month with the highest atmospheric pressure is January (30.12").
The month with the lowest atmospheric pressure is September (29.96").

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Average wind speed in September
Port Salerno, FL

Average wind speed in September - Port Salerno, FL
  • Average wind speed in September: 7.9mph

The windiest months (with the highest average wind speed) are January, March and November (10.3mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).

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Average humidity in September
Port Salerno, FL

Average humidity in September - Port Salerno, FL
  • Average humidity in September: 77%

Months with the highest relative humidity are June and August (78%).
The month with the lowest relative humidity is March (70%).

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Average rainfall in September
Port Salerno, FL

Average rainfall in September - Port Salerno, FL
  • Average rainfall in September: 1.5"

The wettest month (with the highest rainfall) is August (2.56").
The driest month (with the least rainfall) is January (0.39").

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Average rainfall days in September
Port Salerno, FL

Average rainfall days in September - Port Salerno, FL
  • Average rainfall days in September: 22.6 days

The month with the highest number of rainy days is August (23.1 days).
The month with the least rainy days is February (7.7 days).

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Average sea temperature in September
Port Salerno, FL

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

The best month for swimming (with the highest average sea temperature) is August (85.1°F).
The coldest month (with the lowest average sea temperature) is February (73.3°F).

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Average daylight in September /
Average sunshine in September
Port Salerno, FL

Average daylight in September / Average sunshine in September - Port Salerno, FL
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 13.8h).
The month with the shortest days is December (Average daylight: 10.5h).

  • Average sunshine in September: 9h

Months with the most sunshine are July and August (Average sunshine: 10.9h).
Months with the least sunshine are January and December (Average sunshine: 6.1).

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Average sunshine days in September
Port Salerno, FL

Average sunshine days in September - Port Salerno, FL
  • Average sunshine days in September: 4.7 days

The month with the most sunshine days is January (19.5 days).
The month with the least sunshine days is August (3.4 days).

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Average UV index in September
Port Salerno, FL

Average UV index in September - Port Salerno, FL
  • Average UV index in September: 7

Months with the highest UV index are May, June, July, August and September (UV index 7).
Months with the lowest UV index are January and December (UV index 5).

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Average cloud cover in September
Port Salerno, FL

Average cloud cover in September - Port Salerno, FL
  • Average cloud cover in September: 29

Months with the most cloud cover are January, November and December (Cloud cover 34).
Months with the least cloud cover are May and July (Cloud cover 26).

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Average visibility in September
Port Salerno, FL

Average visibility in September - Port Salerno, 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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