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September Weather in Duncanville, United States

Last updated: June 24, 2025

In September, the average temperature in Duncanville, United States is a warm 26°C (80°F), with a minimum dipping down to 10°C (51°F) and a maximum soaring up to 38°C (100°F). Expect some rainfall, with 76 mm (3.0 in) of precipitation spread over 8 days. The average humidity hovers around 65%, making for a humid but pleasant climate.

September Temperature in Duncanville

In September in Duncanville, the average temperature is 26°C (80°F). Maximums can reach 38°C (100°F), and minimums can be as low as 10°C (51°F). This makes it a great time to explore Duncanville, but be sure to pack for both warm days and cooler nights.

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

The chart illustrates September temperature patterns in Duncanville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Duncanville, September typically has an average temperature of 26°C (80°F), with highs reaching up to 38°C (100°F) and lows dropping to around 10°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec474961667582858579685752
Data source: Temperature data for Duncanville 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 Duncanville

In Duncanville in September, the precipitation amount is 76 mm (3.0 in) spread over a duration of 8 days.

September Precipitation Trends in Duncanville

The chart displays monthly precipitation patterns in Duncanville, 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 Duncanville, September typically receives around 76 mm (3.0 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec5594107106158914495761435558
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Duncanville

In Duncanville in September humidity is 65%. With an average temperature of 26°C (80°F), this humidity feels like a warm, sticky embrace, making travel less comfortable as you navigate the sights.

September Average Humidity in Duncanville

This chart illustrates the average monthly humidity levels in Duncanville, 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 Duncanville is approximately 65%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%79%78%78%81%78%73%66%65%72%82%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Duncanville

In Duncanville in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Duncanville.

Maximum UV Index Levels in Duncanville for September

The chart shows the monthly maximum UV Index (UVI) for Duncanville 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 Duncanville typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec478101111111110864
Data source: Duncanville 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 Duncanville Compares to Other Months

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

This table compares monthly weather conditions in Duncanville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)55 mm (2.2 inches)80%moderate
February Weather10°C (50°F)94 mm (3.7 inches)79%high
March Weather16°C (61°F)107 mm (4.2 inches)78%very high
April Weather19°C (66°F)106 mm (4.2 inches)78%very high
May Weather24°C (75°F)158 mm (6.2 inches)81%extreme
June Weather28°C (82°F)91 mm (3.6 inches)78%extreme
July Weather30°C (86°F)44 mm (1.7 inches)73%extreme
August Weather29°C (85°F)95 mm (3.7 inches)66%extreme
September Weather26°C (80°F)76 mm (3.0 inches)65%very high
October Weather20°C (68°F)143 mm (5.6 inches)72%very high
November Weather14°C (57°F)55 mm (2.2 inches)82%high
December Weather11°C (52°F)58 mm (2.3 inches)87%moderate

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