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September Weather in Carrollton, United States

Last updated: August 27, 2025

In September, the average temperature in Carrollton, United States is a pleasant 25°C (78°F), with a range that can dip as low as 10°C (50°F) and soar to 38°C (100°F). Expect around 96 mm (3.8 in) of precipitation spread across 8 days, contributing to an average humidity level of 73%. Enjoy the warmth, but be prepared for those occasional showers!

September Temperature in Carrollton

In September in Carrollton, the average temperature is 25°C (78°F), with maximums soaring up to 38°C (100°F) and minimums dropping to as low as 10°C (50°F). It's an ideal time to explore Carrollton, but be prepared for warm days and cooler evenings.

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 25°C (78°F), with highs reaching up to 38°C (100°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec465059637379828178675350
Data source: Temperature data for Carrollton generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Carrollton

In Carrollton in September, the precipitation amount is 96 mm (3.8 in) over the course of 8 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 96 mm (3.8 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec1181871671511121251021209612284128
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Carrollton

In Carrollton in September, humidity is 73%. With an average temperature of 25°C (78°F), this humidity feels like stepping into a warm, heavy blanket that wraps around you, making travel feel sluggish and requiring regular breaks to stay refreshed.

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 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%80%82%83%80%80%75%73%76%84%88%
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 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec47810111211119864
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.
 TemperaturePrecipitationHumidityUV
January Weather8°C (46°F)118 mm (4.7 inches)84%moderate
February Weather10°C (51°F)186 mm (7.3 inches)83%high
March Weather15°C (59°F)167 mm (6.6 inches)80%very high
April Weather17°C (63°F)151 mm (6.0 inches)82%very high
May Weather23°C (73°F)112 mm (4.4 inches)83%extreme
June Weather26°C (79°F)125 mm (4.9 inches)80%extreme
July Weather28°C (82°F)102 mm (4.0 inches)80%extreme
August Weather27°C (81°F)120 mm (4.7 inches)75%extreme
September Weather25°C (78°F)96 mm (3.8 inches)73%very high
October Weather19°C (67°F)122 mm (4.8 inches)76%very high
November Weather12°C (54°F)84 mm (3.3 inches)84%high
December Weather10°C (51°F)128 mm (5.0 inches)88%moderate

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