September weather forecast
Terrell, FL

The first month of the autumn, September, is also a hot month in Terrell, Florida, with an average temperature fluctuating between 88.2°F (31.2°C) and 72.9°F (22.7°C).

Temperature

September's climate shows a minor adjustment in average high-temperatures to a still hot 88.2°F (31.2°C) from August's 90°F (32.2°C). Terrell experiences an average low-temperature of 72.9°F (22.7°C) in month of September.

Heat index

For most parts of September, the heat index is calculated to be a blisteringly hot 105.8°F (41°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
When assessing, remember that heat index measurements are for light winds and shaded spots. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a numerical representation of warmth when taking temperature and moisture levels into account. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.

Humidity

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

Rainfall

In Terrell, in September, during 15.9 rainfall days, 1.46" (37mm) of precipitation is typically accumulated. Throughout the year, in Terrell, there are 140.2 rainfall days, and 15" (381mm) of precipitation is accumulated.

Daylight

In September, the average length of the day in Terrell is 12h and 19min.
On the first day of September in Terrell, sunrise is at 7:07 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 7:15 pm EDT.

Sunshine

The average sunshine in September in Terrell is 8.8h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in Terrell. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the average person.
Note: In September, a daily maximum UV index of 7 leads to the following instructions:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. During bright days, sunglasses that offer UVA and UVB defense are recommended.