Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
With the onset of September, the average high-temperature registers at a warm 85.3°F (29.6°C), subtly different from August's 88.9°F (31.6°C). Fernandina Beach experiences an average low-temperature reading of 75°F (23.9°C) throughout September.Heat index
During September, the heat index is evaluated at a torrid 95°F (35°C). Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.In terms of the heat index, values are set with light wind and shade conditions in mind. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', gives a temperature feeling by integrating air temperature and humidity. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
One of the main methods the human body employs to cool down is by perspiring, as this process allows sweat to evaporate and remove excess heat. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.
Humidity
In September, the average relative humidity is 76%.Rainfall
In September, 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
February through December are months without snowfall.Ocean temperature
In Fernandina Beach, the average seawater temperature in September is 82.8°F (28.2°C).Note: Water temperature ranging between 77°F (25°C) and 84.2°F (29°C) is considered very warm and pleasing for everyone. It allows for enjoyable water activities over extended periods without discomfort.
Daylight
In September, the average length of the day in Fernandina Beach is 12h and 20min.On the first day of September in Fernandina Beach, sunrise is at 7:02 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 7:11 pm EDT.
Sunshine
The average sunshine in September is 8.5h.UV index
In Fernandina Beach, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 6 in September translates into this advice:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. 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-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in Fernandina Beach in September?
What is the average humidity in September in Fernandina Beach?
How much does it rain in Fernandina Beach in September?
When it does not snow in Fernandina Beach?
How warm is the water in September in Fernandina Beach?
How many hours of daylight does Fernandina Beach have in September?
When is the sunrise / sunset in September in Fernandina Beach?
How long on average sun shines in September in Fernandina Beach?
What is the UV index reading in September in Fernandina Beach?
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).
Average pressure in September
Fernandina Beach, FL
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.98"Hg).
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).
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%).
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").
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).
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).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).
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).
Average daylight in September /
Average sunshine in September
Fernandina Beach, FL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are January and December (Average sunshine: 5h and 48min).
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).
Average UV index in September
Fernandina Beach, FL
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 4).
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).
Average visibility in September
Fernandina Beach, 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).
Fernandina Beach, Florida, USA
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