September weather forecast
Fellsmere, FL

The first month of the autumn, September, is also a moderately hot month in Fellsmere, Florida, with temperature in the range of an average low of 75.9°F (24.4°C) and an average high of 85.8°F (29.9°C).

Temperature

Transitioning into September, Fellsmere records an average high-temperature of a warm 85.8°F (29.9°C), almost identical to August's 88.7°F (31.5°C). Throughout September, a steady low-temperature average of 75.9°F (24.4°C) is noted.

Heat index

The heat index in September is appraised at a torrid 98.6°F (37°C). Take more safety measures, heat exhaustion and heat cramps are potential outcomes. Persistent activity might lead to heatstroke.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', takes into account both air temperature and humidity to illustrate what people actually feel. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
Perspiration is the body's default response to elevated temperatures, as it promotes the evaporation of sweat to achieve cooling. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

The average relative humidity in September in Fellsmere is 79%.

Rainfall

In Fellsmere, in September, it is raining for 24.1 days, with typically 4.76" (121mm) of accumulated precipitation. In Fellsmere, during the entire year, the rain falls for 207.6 days and collects up to 39.8" (1011mm) of precipitation.

Daylight

The average length of the day in September in Fellsmere is 12h and 19min.
On the first day of September, sunrise is at 7:01 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 7:09 pm EDT.

Sunshine

In September, the average sunshine is 9h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in Fellsmere, Florida. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: The UV index of 7 during September leads to these advisories:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. 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. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.