September weather forecast
Pirate Harbor, FL

The first month of the autumn, September, is still a tropical month in Pirate Harbor, Florida, with temperature in the range of an average low of 75°F (23.9°C) and an average high of 88.7°F (31.5°C).

Temperature

The start of September sees the average high-temperature at a still tropical 88.7°F (31.5°C), showing little difference from August's 90.1°F (32.3°C). In Pirate Harbor, September's nights observe an average temperature dip to a warm 75°F (23.9°C).

Heat index

The average heat index in September is estimated at a blisteringly hot 107.6°F (42°C). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
Heat index data is primarily for areas with shade and subjected to light winds. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', joins air temperature with relative humidity to produce a temperature perception for humans. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

The most humid month in Pirate Harbor is September, with an average relative humidity of 78%.

Rainfall

In Pirate Harbor, Florida, during September, the rain falls for 22.6 days and regularly aggregates up to 3.5" (89mm) of precipitation. Throughout the year, in Pirate Harbor, there are 181.8 rainfall days, and 29.37" (746mm) of precipitation is accumulated.

Daylight

In Pirate Harbor, the average length of the day in September is 12h and 18min.
On the first day of September, sunrise is at 7:08 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:15 pm EDT.

Sunshine

In Pirate Harbor, the average sunshine in September is 8.9h.

UV index

The months with the highest UV index in Pirate Harbor are May through September, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: In September, a daily UV index of 7 turns into the following recommendations:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.