September weather forecast
Largo, FL

September in Largo starts moving away from the oppressive heat of the previous months but is tainted by persistent, albeit less frequent, rainfall. Summer's end brings in a sense of respite as average temperatures begin to decline. However, it is worth noting that September still sees substantial rainfall with an accumulation of 2.17" (55mm). Winds pick up the pace, offering cooling breezes that provide welcomed relief to residents. As the city steps into October, the rainfall drops significantly, marking the start of the dryer half of the year.

Temperature

The beginning of September reveals an average high-temperature of a still hot 86.2°F (30.1°C), showing minimal deviation from the previous month. Recording a slight decline in temperature during the nights, Largo's September temperatures average at a moderately hot 77.9°F (25.5°C).

Heat index

The average heat index in September is estimated at a very hot 96.8°F (36°C). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. 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 remain especially vital for babies and toddlers. Juveniles are regularly less conscious of the need to recuperate and rehydrate. Thirst is a tardy symptom of dehydration - hydration, especially during lengthy physical activities, should be maintained.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.

Humidity

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

Rainfall

In Largo, in September, during 20.7 rainfall days, 2.17" (55mm) of precipitation is typically accumulated. In Largo, during the entire year, the rain falls for 149.9 days and collects up to 16.18" (411mm) of precipitation.

Daylight

In September, the average length of the day is 12h and 19min.
On the first day of September, sunrise is at 7:10 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 September, the average sunshine is 9.1h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.
Note: An average UV index of 7 in September transforms into this advice:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.