September weather forecast
Port Richey, FL

The first month of the autumn, September, is also a hot month in Port Richey, Florida, with an average temperature fluctuating between 86.4°F (30.2°C) and 77°F (25°C).

Temperature

During September, Port Richey observes a subtle ascent to a still tropical 86.4°F (30.2°C) from August's 88.2°F (31.2°C) in the average high-temperature. During the month of September, the temperature falls to an average of 77°F (25°C).

Heat index

In September, the heat index is computed to be a torrid 98.6°F (37°C). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
The body's innate mechanism to counteract overheating is through perspiration, as it leverages the cooling effects of sweat evaporation. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

In Port Richey, the average relative humidity in September is 76%.

Rainfall

In Port Richey, during September, the rain falls for 20.4 days and regularly aggregates up to 2.95" (75mm) of precipitation. Throughout the year, in Port Richey, there are 164 rainfall days, and 26.57" (675mm) of precipitation is accumulated.

Daylight

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

Sunshine

In Port Richey, the average sunshine in September is 9.2h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in Port Richey. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: An average UV index of 7 in September transforms into this advice:
Fend off overexposure. Sun protection is vital. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.