September weather forecast
Fort Worth, TX

With the arrival of September, Fort Worth begins its transition into autumn. Rainfall increases marginally to 62mm (2.44"), while humidity tends to stay consistent compared to August. Fall's onset is marked by vibrant hues in nature, making the city particularly photogenic. Mid-September to October is typically regarded as transition period, with both foliage and temperatures changing dramatically. Gradual cooling and the return of regular rainfall highlight the end of the summer season.

Temperature

The arrival of September suggests a slight decrease in the average high-temperature, moving from a sweltering 35.4°C (95.7°F) in August to a tropical 30.8°C (87.4°F). Fort Worth's average low-temperature is measured at an agreeable 20.9°C (69.6°F) during September.

Heat index

September's mean heat index is calculated to be a fiery hot 35°C (95°F). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', combines both the air temperature and the humidity level to give a perceived human temperature. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
The body's natural response to excessive warmth is perspiration, as it allows for cooling through sweat evaporation. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

In Fort Worth, the average relative humidity in September is 64%.

Rainfall

In September, the rain falls for 14.9 days. Throughout September, 62mm (2.44") of precipitation is accumulated. Throughout the year, there are 132.4 rainfall days, and 657mm (25.87") of precipitation is accumulated.

Snowfall

In Fort Worth, snow does not fall in March through October.

Daylight

In Fort Worth, the average length of the day in September is 12h and 22min.
On the first day of September, sunrise is at 7:04 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 7:14 pm CDT.

Sunshine

In Fort Worth, the average sunshine in September is 8.5h.

UV index

In Fort Worth, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A maximum UV index of 6 in September translates into the following recommendations:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.