September weather forecast
Royster, FL

September, the first month of the autumn in Royster, is also a hot month, with an average temperature varying between 73.6°F (23.1°C) and 88.2°F (31.2°C).

Temperature

The onset of September brings an average high-temperature of a still hot 88.2°F (31.2°C), nearly matching the August temperature. September nights are marked by an average low-temperature of 73.6°F (23.1°C).

Heat index

In September, the average heat index is computed to be a blisteringly hot 105.8°F (41°C). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.
Heat index determinations are made taking into account the shade and light air movements. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', quantifies the warmth felt when relative humidity is considered. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. An increase in relative humidity disrupts body cooling by slowing the evaporation rate, thereby reducing the rate at which the body cools and amplifying the sense of heat. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.

Humidity

The months with the highest humidity in Royster are August and September, with an average relative humidity of 79%.

Rainfall

In Royster, during September, the rain falls for 20.6 days and regularly aggregates up to 3.98" (101mm) of precipitation. In Royster, during the entire year, the rain falls for 189 days and collects up to 36.54" (928mm) of precipitation.

Daylight

In Royster, the average length of the day in September is 12h and 19min.
On the first day of the month, sunrise is at 7:06 am and sunset at 7:48 pm. On the last day of September, sunrise is at 7:20 am and sunset at 7:14 pm EDT.

Sunshine

In Royster, the average sunshine in September is 8.6h.

UV index

The months with the highest UV index in Royster are May through September, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: In September, the maximum UV index of 7 transforms into these recommendations:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. 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. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.