September weather forecast
Groveland, FL

The first month of the autumn, September, is also a hot month in Groveland, Florida, with an average temperature varying between 73°F (22.8°C) and 88.2°F (31.2°C).

Temperature

The ushering in of September brings an average high-temperature of a still hot 88.2°F (31.2°C), closely mirroring the 90.5°F (32.5°C) of August. Groveland records a consistent low-temperature of 73°F (22.8°C) during September nights.

Heat index

September's mean heat index is computed to be a blistering 105.8°F (41°C). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. 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 highly critical to babies and toddlers. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
The body's innate mechanism to counteract overheating is through perspiration, as it leverages the cooling effects of sweat evaporation. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

July through September, with an average relative humidity of 79%, are the most humid months.

Rainfall

In September, the rain falls for 23.6 days. Throughout September, 4.21" (107mm) of precipitation is accumulated. In Groveland, during the entire year, the rain falls for 195.1 days and collects up to 37.28" (947mm) of precipitation.

Daylight

In Groveland, the average length of the day in September is 12h and 19min.
On the first day of September, sunrise is at 7:05 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:14 pm EDT.

Sunshine

The average sunshine in September is 8.7h.

UV index

The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the average person.
Note: The UV index of 6 in September translates into these instructions:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.