September weather forecast
Flo, TX

The first month of the autumn, September, is also a hot month in Flo, Texas, with an average temperature fluctuating between 68.9°F (20.5°C) and 88.7°F (31.5°C).

Temperature

September's arrival comes with a mild decrease in the average high-temperature, moving subtly from a sweltering 95.9°F (35.5°C) in August to a tropical 88.7°F (31.5°C). During September, Flo experiences a consistent low-temperature average of 68.9°F (20.5°C).

Heat index

September's average heat index is computed to be a very hot 102.2°F (39°C). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.
Given the heat index, its values are aligned with shaded sites and gentle winds. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', represents the fusion of temperature and moisture in the air to suggest how warm it feels. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.

Humidity

In September, the average relative humidity is 70%.

Rainfall

In Flo, during September, the rain falls for 15.5 days and regularly aggregates up to 2.56" (65mm) of precipitation. In Flo, during the entire year, the rain falls for 149.4 days and collects up to 30" (762mm) of precipitation.

Snowfall

January, February and September are months with snowfall in Flo. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 1.1 snowfall days, and 0.47" (12mm) of snow is accumulated.

Daylight

In Flo, Texas, the average length of the day in September is 12h and 21min.
On the first day of September in Flo, sunrise is at 6:59 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 7:09 pm CDT.

Sunshine

In September, the average sunshine is 8.4h.

UV index

In September, the average daily maximum UV index in Flo is 6. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the average person.
Note: In September, a daily maximum UV index of 6 leads to the following instructions:
Resist overexposure. Safeguarding from solar damage is indispensable. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.