September weather forecast
Palm Harbor, FL

The first month of the autumn, September, is also a hot month in Palm Harbor, Florida, with temperature in the range of an average high of 86.5°F (30.3°C) and an average low of 77.7°F (25.4°C).

Temperature

September brings a marginal elevation to a still hot 86.5°F (30.3°C) from August's 88°F (31.1°C) in Palm Harbor's average high-temperatures. Palm Harbor sees a gentle drop from the daily peak temperature in September, with an average low settling at a moderately hot 77.7°F (25.4°C).

Heat index

September's mean heat index is computed to be a fiery hot 98.6°F (37°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Observations indicate that the heat index values are for shady locations with light wind. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', evaluates the perceived heat by adding the effect of moisture in the air. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
The human body keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

In Palm Harbor, the average relative humidity in September is 74%.

Rainfall

In September, in Palm Harbor, the rain falls for 21 days. Throughout September, 3.7" (94mm) of precipitation is accumulated. Throughout the year, there are 168.5 rainfall days, and 27.4" (696mm) of precipitation is accumulated.

Ocean temperature

In September, the average ocean temperature is 84.6°F (29.2°C).
Note: Ideal surface water temperatures for any water activity fall between 77°F (25°C) and 84.2°F (29°C), offering maximum enjoyment for lengthened periods.

Daylight

In Palm Harbor, the average length of the day in September is 12h and 19min.
On the first day of September, sunrise is at 7:09 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 7:17 pm EDT.

Sunshine

In Palm Harbor, the average sunshine in September is 9.2h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 7 in September interprets into the following advice:
Guard against overexposure. Protection from sun-induced harm is essential. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Caution! Sand and water surfaces escalate the UV intensity from the Sun.