September weather forecast
Fort Pierce, FL

The first month of the autumn, September, is still a warm month in Fort Pierce, Florida, with an average temperature varying between 85.8°F (29.9°C) and 77.2°F (25.1°C).

Temperature

Fort Pierce indicates an average high-temperature of a warm 85.8°F (29.9°C) in September, showing minor variation from August's 87.6°F (30.9°C). The September nights show a slight decrease to a mean low-temperature of 77.2°F (25.1°C).

Heat index

For most parts of September, the heat index is appraised at a fiery hot 98.6°F (37°C). Take more safety measures, heat exhaustion and heat cramps are potential outcomes. Persistent activity might lead to heatstroke.
Note that heat index values are valued for light wind and location in the shade. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is an estimation of the warmth sensation when considering humidity levels. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. 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 quite important for children. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.
Perspiring is a crucial mechanism for the human body, allowing it to release excessive warmth through evaporating sweat. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

In Fort Pierce, the average relative humidity in September is 78%.

Rainfall

In September, the rain falls for 25.4 days. Throughout September, 5.55" (141mm) of precipitation is accumulated. Throughout the year, in Fort Pierce, there are 221.2 rainfall days, and 46.26" (1175mm) of precipitation is accumulated.

Ocean temperature

In September, the average ocean temperature is 84.4°F (29.1°C).
Note: Swimming, diving, and similar water activities in temperatures ranging from 77°F (25°C) to 84.2°F (29°C) are seen as very agreeable and pleasurable for lengthy periods without discomfort.

Daylight

In September, the average length of the day is 12h and 19min.
On the first day of the month, sunrise is at 7:00 am and sunset at 7:41 pm. On the last day of September, sunrise is at 7:13 am and sunset at 7:08 pm EDT.

Sunshine

In September, the average sunshine is 8.8h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index, 7 in September, converts into the following recommendations:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Be vigilant! The Sun's UV rays get a boost from sand and water reflections.