September weather forecast and climate
Conch Key, FL

September, the first month of the autumn, in Conch Key, is still a warm month, with average temperature fluctuating between 84.6°F (29.2°C) and 82°F (27.8°C).

Temperature

In Conch Key, the average high-temperature in September is essentially the same as in August - a still warm 84.6°F (29.2°C). The average low-temperature, in Conch Key, is 82°F (27.8°C).

Heat index

The average heat index is estimated at a tropical 93.2°F (34°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. 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', 'apparent temperature', 'felt air temperature', or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like activity, metabolic differences, wind, and clothing affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, 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.

Humidity

In September, the average relative humidity is 74%.

Rainfall

The month with the most rainfall in Conch Key is September when the rain falls for 23 days and typically aggregates up to 4.21" (107mm) of precipitation.

Daylight

The average length of the day is 12.3h.

Sunshine

The average sunshine is 9h.

UV index

April through October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to the UV radiation for the ordinary person.
Note: In September, the average maximum UV index of 7 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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. 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.

What is the temperature in September in Conch Key?

In Conch Key, in September, the average high-temperature is 84.6°F (29.2°C), and the average low-temperature is 82°F (27.8°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), that combines relative humidity and air temperature, in September is appraised at 93.2°F (34°C).

What is the average humidity in September in Conch Key?

In September, the average relative humidity in Conch Key, Florida, is 74%.

How much does it rain in Conch Key in September?

In September, in Conch Key, the rain falls for 23 days. Throughout September, 4.21" (107mm) of precipitation is accumulated.

What is the wettest month in Conch Key?

The month with the most rainfall in Conch Key, Florida, is September when the rain falls for 23 days and typically aggregates up to 4.21" (107mm) of precipitation.

How many hours of daylight does Conch Key have in September?

In Conch Key, Florida, the average length of the day in September is 12.3h.

How many hours of sunshine does Conch Key have in September?

In Conch Key, the average sunshine in September is 9h.

What is the month with the highest UV index in Conch Key?

Months with the highest UV index in Conch Key, Florida, are April through October, with an average maximum UV index of 7.

How high is the UV index in September in Conch Key?

In Conch Key, Florida, the average daily maximum UV index in September is 7. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to the UV radiation.
Average temperature in September - Conch Key, FL
  • Average high temperature in September: 84.6°F

The warmest month (with the highest average high temperature) is August (85.5°F).
The month with the lowest average high temperature is January (72.9°F).

  • Average low temperature in September: 82°F

The month with the highest average low temperature is August (82.9°F).
The coldest month (with the lowest average low temperature) is January (67.5°F).

Average pressure in September - Conch Key, FL
  • Average pressure in September: 29.94"

The month with the highest atmospheric pressure is January (30.1").
Months with the lowest atmospheric pressure are September and October (29.94").

Average wind speed in September - Conch Key, FL
  • Average wind speed in September: 9.8mph

The windiest month (with the highest average wind speed) is January (13.4mph).
The calmest month (with the lowest average wind speed) is July (9mph).

Average humidity in September - Conch Key, FL
  • Average humidity in September: 74%

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

Average rainfall in September - Conch Key, FL
  • Average rainfall in September: 4.21"

The wettest month (with the highest rainfall) is September (4.21").
The driest month (with the least rainfall) is March (0.43").

Average rainfall days in September - Conch Key, FL
  • Average rainfall days in September: 23 days

The month with the highest number of rainy days is September (23 days).
The month with the least rainy days is February (10.3 days).

Average daylight in September / Average sunshine in September - Conch Key, FL
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 13.7h).
The month with the shortest days is December (Average daylight: 10.6h).

  • Average sunshine in September: 9h

The month with the most sunshine is July (Average sunshine: 11.1h).
The month with the least sunshine is December (Average sunshine: 6.6h).

Average sunshine days in September - Conch Key, FL
  • Average sunshine days in September: 4.6 days

The month with the most sunshine days is March (18 days).
The month with the least sunshine days is September (4.6 days).

Average UV index in September - Conch Key, FL
  • Average UV index in September: 7

Months with the highest UV index are April, May, June, July, August, September and October (UV index 7).
The month with the lowest UV index is January (UV index 5).

Average cloud cover in September - Conch Key, FL
  • Average cloud cover in September: 28

Months with the most cloud cover are January and October (Cloud cover 32).
The month with the least cloud cover is April (Cloud cover 23).

Average visibility in September - Conch Key, 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).