September weather forecastFlagler Beach, FL
September
Weather in September
The first month of the autumn, September, is still a warm month in Flagler Beach, Florida, with temperature in the range of an average low of 76.1°F (24.5°C) and an average high of 85.1°F (29.5°C).Temperature
Flagler Beach experiences an average high-temperature of a moderately hot 85.1°F (29.5°C) with the onset of September, subtly varied from August's 87.8°F (31°C). Flagler Beach registers a steady nighttime temperature averaging a still warm 76.1°F (24.5°C) throughout September.Heat index
For September, the heat index is estimated at a fiery hot 95°F (35°C). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.Research indicates the heat index considers values in shaded locales and with light winds. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is the outcome of merging air's temperature and its humidity metrics. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.
Humidity
The average relative humidity in September is 77%.Rainfall
In Flagler Beach, during September, the rain falls for 21.5 days and regularly aggregates up to 4.76" (121mm) of precipitation. Throughout the year, there are 191.6 rainfall days, and 35.2" (894mm) of precipitation is accumulated.Ocean temperature
In Flagler Beach, the average seawater temperature in September is 83.8°F (28.8°C).Note: Water activities including swimming and diving are pleasurable in temperatures between 77°F (25°C) and 84.2°F (29°C), ensuring comfort and enjoyment for extended time frames.
Daylight
The average length of the day in September is 12h and 20min.On the first day of September, sunrise is at 7:02 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 7:10 pm EDT.
Sunshine
The average sunshine in September is 8.7h.UV index
In September, the average daily maximum UV index in Flagler Beach is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 6 suggests these recommendations:
Shun overexposure. Protection from sun ravages is indispensable. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. Boost your sun resistance with garments that are densely woven yet spacious. Beware! Reflecting off water and sand, UV rays are much stronger.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Flagler Beach, FL
- Average high temperature in September: 85.1°F
The warmest month (with the highest average high temperature) is August (87.8°F).
The month with the lowest average high temperature is January (65.7°F).
- Average low temperature in September: 76.1°F
The month with the highest average low temperature is August (78.4°F).
The coldest month (with the lowest average low temperature) is January (53.8°F).
Average pressure in September
Flagler Beach, FL
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is September (29.97"Hg).
Average wind speed in September
Flagler Beach, FL
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in September
Flagler Beach, FL
- Average humidity in September: 77%
The month with the highest relative humidity is August (78%).
The month with the lowest relative humidity is March (72%).
Average rainfall in September
Flagler Beach, FL
- Average rainfall in September: 4.76"
The wettest month (with the highest rainfall) is August (5.28").
The driest month (with the least rainfall) is March (1.38").
Average rainfall days in September
Flagler Beach, FL
- Average rainfall days in September: 21.5 days
The month with the highest number of rainy days is August (24.2 days).
The month with the least rainy days is February (10.6 days).
Average sea temperature in September
Flagler Beach, FL
- Average sea temperature in September: 83.8°F
The best month for swimming (with the highest average sea temperature) is August (84.6°F).
The coldest month (with the lowest average sea temperature) is January (67.2°F).
Average daylight in September /
Average sunshine in September
Flagler Beach, FL
- Average daylight in September: 12h and 18min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in September: 8h and 42min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in September
Flagler Beach, FL
- Average sunshine days in September: 6.2 days
The month with the most sunshine days is March (17.2 days).
The month with the least sunshine days is August (4.8 days).
Average UV index in September
Flagler 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 month with the lowest UV index is January (UV index 4).
Average cloud cover in September
Flagler Beach, FL
- Average cloud cover in September: 30
The month with the most cloud cover is December (Cloud cover 37).
The months with the least cloud cover are May and July (Cloud cover 27).
Average visibility in September
Flagler 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).
