September weather forecast
North Naples, FL

Weather in September

The first month of the autumn, September, is still a tropical month in North Naples, Florida, with an average temperature varying between 87.1°F (30.6°C) and 78.4°F (25.8°C).

Temperature

In September, the average high-temperature is almost the same as in August - a still tropical 87.1°F (30.6°C). The average low-temperature, in North Naples, is 78.4°F (25.8°C).

Heat index

The average heat index in September is estimated at a sweltering 100.4°F (38°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
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 'feels like', 'felt air temperature', 'apparent temperature', or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like activity, differences in body mass, height, and shape, wind, and pregnancy affect individual temperature impact. 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. 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.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. 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

The average relative humidity in September in North Naples is 75%.

Rainfall

In North Naples, Florida, it is raining for 21.5 days, with typically 2.4" (61mm) of accumulated precipitation. In North Naples, during the entire year, the rain falls for 162.1 days and collects up to 21.69" (551mm) of precipitation.

Daylight

In September, the average length of the day is 12h and 18min.
On the first day of September, 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 North Naples, the average sunshine in September is 9.2h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 7 in September interpret into the following advice:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. 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. 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.
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FAQ

What is the temperature in September in North Naples?

In September, the average high-temperature is 87.1°F (30.6°C), and the average low-temperature is 78.4°F (25.8°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which represents the influence of relative humidity on air temperature, in September is estimated at 100.4°F (38°C).

What is the average humidity in September in North Naples?

In North Naples, the average relative humidity in September is 75%.

How many days does it rain in September in North Naples?

In North Naples, Florida, in September, during 21.5 rainfall days, 2.4" (61mm) of precipitation is typically accumulated.

How many hours of daylight does North Naples have in September?

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

What time are sunrise and sunset in September in North Naples?

On the first day of September in North Naples, Florida, 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.

How long on average sun shines in September in North Naples?

The average sunshine duration in September in North Naples, Florida, is 9.2h.

What are the months with the highest UV index in North Naples?

The 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 North Naples?

In North Naples, Florida, the average daily maximum UV index in September is 7. A UV Index of 6 to 7 symbolizes a high health risk 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
North Naples, FL

Average temperature in September - North Naples, FL
  • Average high temperature in September: 87.1°F

The warmest month (with the highest average high temperature) is August (88.3°F).
The month with the lowest average high temperature is January (71.6°F).

  • Average low temperature in September: 78.4°F

The month with the highest average low temperature is August (80.2°F).
The coldest month (with the lowest average low temperature) is January (59.5°F).

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Average pressure in September
North Naples, FL

Average pressure in September - North Naples, FL
  • Average pressure in September: 29.94"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is September (29.94"Hg).

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Average wind speed in September
North Naples, FL

Average wind speed in September - North Naples, FL
  • Average wind speed in September: 7mph

The windiest month (with the highest average wind speed) is November (9.2mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).

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Average humidity in September
North Naples, FL

Average humidity in September - North Naples, FL
  • Average humidity in September: 75%

The month with the highest relative humidity is December (76%).
The month with the lowest relative humidity is March (72%).

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Average rainfall in September
North Naples, FL

Average rainfall in September - North Naples, FL
  • Average rainfall in September: 2.4"

The wettest month (with the highest rainfall) is August (4.29").
The driest month (with the least rainfall) is March (0.63").

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Average rainfall days in September
North Naples, FL

Average rainfall days in September - North Naples, FL
  • Average rainfall days in September: 21.5 days

The month with the highest number of rainy days is August (22.4 days).
The month with the least rainy days is February (7 days).

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Average daylight in September /
Average sunshine in September
North Naples, FL

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

The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).

  • Average sunshine in September: 9h and 1min

The months with the most sunshine are May and July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).

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Average sunshine days in September
North Naples, FL

Average sunshine days in September - North Naples, FL
  • Average sunshine days in September: 7.1 days

The month with the most sunshine days is January (21.8 days).
The month with the least sunshine days is August (6.8 days).

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Average UV index in September
North Naples, FL

Average UV index in September - North Naples, 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 months with the lowest UV index are January and February (UV index 5).

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Average cloud cover in September
North Naples, FL

Average cloud cover in September - North Naples, FL
  • Average cloud cover in September: 27

The month with the most cloud cover is January (Cloud cover 28).
The months with the least cloud cover are March and April (Cloud cover 22).

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Average visibility in September
North Naples, FL

Average visibility in September - North Naples, 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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