September weather forecast
Carrollton, TX

September announces the arrival of autumn in Carrollton, Texas, significantly reducing temperatures but still maintaining the city's warmth, with an average high temperature of 88°F (31.1°C). Rainfall rises and cloud coverage increases, inviting cooler and more pleasant weather conditions. It calls for comfort outdoor pursuits as it breaks the persistent heat of the summer. The shrinking length of daylight becomes more noticeable, heralding the coming of the cooler months. Despite the heat withdrawal, the weather maintains a mild summer feeling, making it favorable for barbecues and outdoor festivals.

Temperature

Transition into September subtly marks a drop in the average high-temperature, moderately moving from a very hot 96.3°F (35.7°C) in August to a tropical 88°F (31.1°C). Carrollton reports an average low-temperature of 70.7°F (21.5°C) during the nights of September.

Heat index

The heat index for September is evaluated at a torrid 96.8°F (36°C). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
In terms of the heat index, values are set with light wind and shade conditions in mind. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

In Carrollton, the average relative humidity in September is 62%.

Rainfall

In Carrollton, in September, during 14.8 rainfall days, 2.64" (67mm) of precipitation is typically accumulated. In Carrollton, during the entire year, the rain falls for 142.4 days and collects up to 31.3" (795mm) of precipitation.

Snowfall

March through October are months without snowfall in Carrollton.

Daylight

In Carrollton, the average length of the day in September is 12h and 22min.
On the first day of the month, sunrise is at 7:02 am and sunset at 7:52 pm. On the last day of September, in Carrollton, sunrise is at 7:21 am and sunset at 7:13 pm CDT.

Sunshine

The average sunshine in September is 8.5h.

UV index

In Carrollton, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum UV index of 6 during September leads to these instructions:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Stay sun-safe with clothing that is both closely woven and worn loosely.