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

September in Largo, Florida, is marked by an average high-temperature of a still tropical 86.2°F (30.1°C), almost identical to the preceding month. Largo maintains a near steady average temperature of 77.9°F (25.5°C) during the nights of September, demonstrating little drop from daytime highs.

Heat index

The heat index value during September is appraised at a very hot 96.8°F (36°C). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', shows a temperature sensation when both heat and moisture conditions are combined. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for 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.
Perspiration and the resultant sweat evaporation are the body's natural thermostat, helping regulate temperature. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

The average relative humidity in September in Largo is 74%.

Rainfall

In Largo, in September, it is raining for 20.7 days, with typically 2.17" (55mm) of accumulated precipitation. Throughout the year, in Largo, there are 149.9 rainfall days, and 16.18" (411mm) of precipitation is accumulated.

Daylight

In September, the average length of the day in Largo is 12h and 19min.
On the first day of the month, sunrise is at 7:10 am and sunset at 7:51 pm. On the last day of September, in Largo, sunrise is at 7:23 am and sunset at 7:17 pm EDT.

Sunshine

In Largo, the average sunshine in September is 9.1h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in Largo, Florida. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: In September, the maximum UV index of 7 suggests this advice:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.