September weather forecast
Pierce, FL

The first month of the autumn, September, is still a tropical month in Pierce, Florida, with temperature in the range of an average low of 73.6°F (23.1°C) and an average high of 88.2°F (31.2°C).

Temperature

Pierce's weather in September, with an average high-temperature of a still tropical 88.2°F (31.2°C), subtly shifts from August's 90°F (32.2°C). Pierce experiences an average low-temperature of 73.6°F (23.1°C) in month of September.

Heat index

September's mean heat index is computed to be an extremely hot 105.8°F (41°C). Greater preventive actions are needed, heat exhaustion and heat cramps are likely. Persistent activity could provoke heatstroke.
Be aware that heat index ratings are designed for shaded locations and minor breezes. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is found by incorporating humidity levels into the air temperature measurement. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
The human body keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. An increase in relative humidity retards evaporation, subsequently reducing the body's heat removal rate and leading to a sensation of being overly warm. When body heat isn't effectively managed, risks of dehydration and overheating amplify.

Humidity

The months with the highest humidity in Pierce, Florida, are August and September, with an average relative humidity of 79%.

Rainfall

In September, in Pierce, the rain falls for 20.6 days. Throughout September, 3.98" (101mm) of precipitation is accumulated. In Pierce, during the entire year, the rain falls for 189 days and collects up to 36.54" (928mm) of precipitation.

Daylight

In Pierce, the average length of the day in September is 12h and 19min.
On the first day of September, sunrise is at 7:06 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:14 pm EDT.

Sunshine

The average sunshine in September in Pierce, Florida, is 8.6h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum UV index of 7 in September translates into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays.