September weather forecast and climate
Fernandina Beach, FL

The glorious Fernandina Beach in Florida found on the scenic Amelia Island
The glorious Fernandina Beach in Florida found on the scenic Amelia Island

Weather in September

September, the first month of the autumn, in Fernandina Beach, is also a moderately hot month, with average temperature ranging between min 75°F (23.9°C) and max 85.3°F (29.6°C).

Temperature

In September, the average high-temperature is relatively the same as in August - a moderately hot 85.3°F (29.6°C). In September, in Fernandina Beach, the average low-temperature is 75°F (23.9°C).

Heat index

In September, the average heat index is estimated at a sweltering 95.9°F (35.5°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 'real feel', 'feels like', 'felt air temperature', or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (differences in body mass, height, and shape, clothing, pregnancy). 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.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. 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

The average relative humidity in September is 76%.

Rainfall

In September, in Fernandina Beach, the rain falls for 21 days. Throughout September, 4.49" (114mm) of precipitation is accumulated. Throughout the year, there are 185.3 rainfall days, and 35.87" (911mm) of precipitation is accumulated.

Snowfall

In Fernandina Beach, Florida, snow does not fall in February through December.

Ocean temperature

In September, the average ocean temperature in Fernandina Beach is 82.8°F (28.2°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

The average length of the day in September is 12.3h.

Sunshine

In September, the average sunshine in Fernandina Beach is 8.5h.

UV index

The average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high threat to health from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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 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. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
[Resources]

FAQ

What is the temperature in September in Fernandina Beach?

In Fernandina Beach, Florida, in September, the average high-temperature is 85.3°F (29.6°C), and the average low-temperature is 75°F (23.9°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), that represents influence of the relative humidity to air temperaure, in September is calculated to 95.9°F (35.5°C).

What is the average humidity in September in Fernandina Beach?

The average relative humidity in September is 76%.

How many days does it rain in September in Fernandina Beach?

In Fernandina Beach, Florida, during September, the rain falls for 21 days and regularly aggregates up to 4.49" (114mm) of precipitation.

When it does not snow in Fernandina Beach?

In Fernandina Beach snow does not fall in February through December.

What is the ocean temperature in September in Fernandina Beach?

In Fernandina Beach, Florida, the average seawater temperature in September is 82.8°F (28.2°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.

How many hours of daylight does Fernandina Beach have in September?

In September, the average length of the day in Fernandina Beach, Florida, is 12.3h.

How long on average sun shines in September in Fernandina Beach?

In September, the average sunshine is 8.5h.

How high is the UV index in September in Fernandina Beach?

In September, the average daily maximum UV index in Fernandina Beach, Florida, is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from the exposure to the Sun's UV radiation.

Average temperature in September
Fernandina Beach, FL

Average temperature in September - Fernandina Beach, FL
  • Average high temperature in September: 85.3°F

The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is January (62.1°F).

  • Average low temperature in September: 75°F

The month with the highest average low temperature is August (77.7°F).
The coldest month (with the lowest average low temperature) is January (48.7°F).

[Resources]

Average pressure in September
Fernandina Beach, FL

Average pressure in September - Fernandina Beach, FL
  • Average pressure in September: 29.98"

The month with the highest atmospheric pressure is January (30.14").
Months with the lowest atmospheric pressure are June, August and September (29.98").

[Resources]

Average wind speed in September
Fernandina Beach, FL

Average wind speed in September - Fernandina Beach, FL
  • Average wind speed in September: 7.4mph

The windiest month (with the highest average wind speed) is January (8.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).

[Resources]

Average humidity in September
Fernandina Beach, FL

Average humidity in September - Fernandina Beach, FL
  • Average humidity in September: 76%

The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is March (71%).

[Resources]

Average rainfall in September
Fernandina Beach, FL

Average rainfall in September - Fernandina Beach, FL
  • Average rainfall in September: 4.49"

The wettest month (with the highest rainfall) is August (5.87").
The driest month (with the least rainfall) is January (1.3").

[Resources]

Average rainfall days in September
Fernandina Beach, FL

Average rainfall days in September - Fernandina Beach, FL
  • Average rainfall days in September: 21 days

The month with the highest number of rainy days is August (25.6 days).
The month with the least rainy days is January (9.6 days).

[Resources]

Average snowfall days in September
Fernandina Beach, FL

Average snowfall days in September - Fernandina Beach, FL
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (0.3 days).
Months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).

[Resources]

Average sea temperature in September
Fernandina Beach, FL

Average sea temperature in September - Fernandina Beach, FL
  • Average sea temperature in September: 82.7°F

The best month for swimming (with the highest average sea temperature) is August (83°F).
The coldest month (with the lowest average sea temperature) is February (58.3°F).

[Resources]

Average daylight in September /
Average sunshine in September
Fernandina Beach, FL

Average daylight in September / Average sunshine in September - Fernandina Beach, FL
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 14.1h).
The month with the shortest days is December (Average daylight: 10.2h).

  • Average sunshine in September: 8.5h

The month with the most sunshine is July (Average sunshine: 10.9h).
Months with the least sunshine are January and December (Average sunshine: 5.8).

[Resources]

Average sunshine days in September
Fernandina Beach, FL

Average sunshine days in September - Fernandina Beach, FL
  • Average sunshine days in September: 6.3 days

The month with the most sunshine days is January (19.2 days).
The month with the least sunshine days is August (3.8 days).

[Resources]

Average UV index in September
Fernandina Beach, FL

Average UV index in September - Fernandina Beach, FL
  • Average UV index in September: 6

Months with the highest UV index are May, June, July and August (UV index 7).
Months with the lowest UV index are January and December (UV index 4).

[Resources]

Average cloud cover in September
Fernandina Beach, FL

Average cloud cover in September - Fernandina Beach, FL
  • Average cloud cover in September: 32

The month with the most cloud cover is December (Cloud cover 39).
The month with the least cloud cover is May (Cloud cover 27).

[Resources]

Average visibility in September
Fernandina Beach, FL

Average visibility in September - Fernandina 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).

[Resources]