September weather forecast
Palm Harbor, FL

September, the first month of the autumn in Palm Harbor, is still a tropical month, 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

Palm Harbor marks the onset of September with an average high-temperature of a still hot 86.5°F (30.3°C), subtly divergent from August's 88°F (31.1°C). Palm Harbor sustains a near constant temperature throughout September, with nighttime averages of 77.7°F (25.4°C).

Heat index

September's average heat index is calculated to be a fiery hot 98.6°F (37°C). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'feels like' or 'apparent temperature', binds temperature metrics with humidity values to give a sense of the actual warmth. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of 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. Rising body temperatures due to excess heat retention could signify impending heat disorders.

Humidity

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

Rainfall

In Palm Harbor, in September, it is raining for 21 days, with typically 3.7" (94mm) of accumulated precipitation. In Palm Harbor, Florida, during the entire year, the rain falls for 168.5 days and collects up to 27.4" (696mm) of precipitation.

Ocean temperature

In Palm Harbor, the average seawater temperature in September is 84.6°F (29.2°C).
Note: For any water activity, temperatures between 77°F (25°C) and 84.2°F (29°C) are deemed excellent and extremely satisfying for enduring periods.

Daylight

The average length of the day in September is 12h and 19min.
On the first day of September in Palm Harbor, 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 in Palm Harbor, Florida, are May through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index, 7 in September, converts into the following recommendations:
Deter overexposure. Protecting against the sun's effects is essential. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Caution! The reflection of sand and water significantly amplifies the Sun's UV radiation.