September Weather in Carrollton, United States

Last updated: June 24, 2025

In September, the average temperature in Carrollton, United States hovers around 20°C (68°F), making it a pleasant time to visit. Expect a cozy minimum of 4°C (39°F) and a warm maximum of 34°C (93°F), perfect for both cool evenings and sunny afternoons. However, be prepared for some rain, as the area receives an average of 114 mm (4.5 in) of precipitation over 9 days. With an average humidity of 77%, the atmosphere can feel quite refreshing as you explore!

September Temperature in Carrollton

In September in Carrollton, the average temperature is 20°C (68°F). The maximum can reach 34°C (93°F), while the minimum can be as low as 4°C (39°F). Overall, this month offers a pleasant variety of temperatures, making it an excellent time for travelers to explore the region.

September Weather in Carrollton: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Carrollton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Carrollton, September typically has an average temperature of 20°C (68°F), with highs reaching up to 34°C (93°F) and lows dropping to around 4°C (39°F).

Data source: Temperature data for Carrollton generated using information from the Copernicus Climate Change Service.

September Precipitation in Carrollton

In Carrollton in September, the precipitation amount is 114 mm (4.5 in) over the course of 9 days.

September Precipitation Trends in Carrollton

The chart displays monthly precipitation patterns in Carrollton, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Carrollton, September typically receives around 114 mm (4.5 inches) of precipitation spread over approximately 9 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Carrollton

In Carrollton in September, humidity is 77%. With an average temperature of 20°C (68°F), this humidity feels like a warm, sticky embrace, making it essential for travelers to stay hydrated and take breaks in shaded areas to avoid feeling sluggish in the heat.

September Average Humidity in Carrollton

This chart illustrates the average monthly humidity levels in Carrollton, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Carrollton is approximately 77%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Carrollton

In Carrollton in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Carrollton.

Maximum UV Index Levels in Carrollton for September

The chart shows the monthly maximum UV Index (UVI) for Carrollton in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Carrollton typically reaches 8, which falls under the very high exposure category.

Data source: Carrollton September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How September Weather in Carrollton Compares to Other Months

Weather in Carrollton varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Carrollton, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Carrollton, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (30°F)	93 mm (3.7 inches)	88%	moderate
February Weather	1°C (34°F)	112 mm (4.4 inches)	88%	moderate
March Weather	5°C (41°F)	101 mm (4.0 inches)	87%	high
April Weather	10°C (51°F)	133 mm (5.3 inches)	87%	very high
May Weather	17°C (62°F)	127 mm (5.0 inches)	81%	very high
June Weather	21°C (70°F)	133 mm (5.3 inches)	83%	very high
July Weather	24°C (75°F)	128 mm (5.0 inches)	82%	very high
August Weather	22°C (73°F)	105 mm (4.1 inches)	76%	very high
September Weather	20°C (68°F)	114 mm (4.5 inches)	77%	very high
October Weather	14°C (57°F)	120 mm (4.7 inches)	82%	high
November Weather	5°C (42°F)	96 mm (3.8 inches)	89%	moderate
December Weather	2°C (36°F)	100 mm (3.9 inches)	86%	low