September weather forecast
Flagler Beach, FL

The first month of the autumn, September, is also a moderately hot month in Flagler Beach, Florida, with an average temperature varying between 76.1°F (24.5°C) and 85.1°F (29.5°C).

Temperature

Flagler Beach's September reports an average high-temperature of a warm 85.1°F (29.5°C), exhibiting a minor difference from August. Nighttime temperatures in Flagler Beach hover around an average low of 76.1°F (24.5°C) in September, a slight descent from daytime highs.

Heat index

September's average heat index is estimated at a torrid 95°F (35°C). Apply extra caution, heat cramps and heat exhaustion could happen. Heatstroke might occur with long-duration activity.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', integrates the air's temperature and its humidity to showcase the felt temperature by people. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.

Humidity

In September, the average relative humidity is 77%.

Rainfall

In Flagler Beach, in September, it is raining for 21.5 days, with typically 4.76" (121mm) of accumulated precipitation. In Flagler Beach, during the entire year, the rain falls for 191.6 days and collects up to 35.2" (894mm) of precipitation.

Ocean temperature

In Flagler Beach, the average seawater temperature in September is 83.8°F (28.8°C).
Note: Water surface temperatures from 77°F (25°C) to 84.2°F (29°C) are considered optimal and extremely delightful for long-lasting pleasure in any water activity.

Daylight

In September, the average length of the day is 12h and 20min.
On the first day of September in Flagler Beach, Florida, 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

In September, the average sunshine is 8.7h.

UV index

In September, the average daily maximum UV index in Flagler Beach is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the average person.
Note: A maximum high UV index of 6 in September translates into the following recommendations:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. 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. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Beware! Reflecting off water and sand, UV rays are much stronger.