September weather forecast
Keri, FL

The first month of the autumn, September, is also a hot month in Keri, Florida, with temperature in the range of an average high of 88.3°F (31.3°C) and an average low of 74.3°F (23.5°C).

Temperature

At the start of September, Keri's average high-temperature reaches a still hot 88.3°F (31.3°C), subtly different from the preceding month. During the month of September, the temperature falls to an average of 74.3°F (23.5°C).

Heat index

September's mean heat index is computed to be a scorching 107.6°F (42°C). Preventive measures are required to mitigate the risk of heat cramps and heat exhaustion. Continuous activity may precipitate heatstroke.
The metrics for the heat index are tailored for both shady environments and light winds. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', reflects the feeling of heat when considering both air temperature and humidity. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are quite important for children. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. Elevated relative humidity disrupts typical body cooling by reducing the evaporation rate, consequently decreasing the body's cooling rate and enhancing the feeling of heat. The body is at risk of dehydration and related complications when it fails to shed excessive heat.

Humidity

With an average relative humidity of 80%, September is the most humid month.

Rainfall

In Keri, during September, the rain falls for 19.7 days and regularly aggregates up to 1.81" (46mm) of precipitation. In Keri, during the entire year, the rain falls for 161.1 days and collects up to 17.6" (447mm) of precipitation.

Daylight

The average length of the day in September is 12h and 18min.
On the first day of September in Keri, sunrise is at 7:05 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 7:12 pm EDT.

Sunshine

In Keri, the average sunshine in September is 8.8h.

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 vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: The daily high UV index of 7 in September translates into this advice:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. 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. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.