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September Weather in Dallas City, United States

Last updated: June 24, 2025

In September, the average temperature in Dallas City, United States is a pleasant 21°C (70°F), with a minimum of 7°C (45°F) and a maximum soaring up to 35°C (95°F). Expect around 100 mm (4.0 in) of precipitation spread over 8 days, along with an average humidity level of 78%. Perfect for those who enjoy a bit of variety in their weather!

September Temperature in Dallas City

In September in Dallas City, the average temperature is 21°C (70°F), with maximums reaching 35°C (95°F) and minimums dropping as low as 7°C (45°F). This diverse temperature range makes it important for travelers to pack accordingly to enjoy their stay comfortably.

September Weather in Dallas City: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Dallas City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Dallas City, September typically has an average temperature of 21°C (70°F), with highs reaching up to 35°C (95°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec262842516475787570554034
Data source: Temperature data for Dallas City 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 Dallas City

In Dallas City in September, the precipitation amount is 100 mm (4.0 in) distributed over a span of 8 days.

September Precipitation Trends in Dallas City

The chart displays monthly precipitation patterns in Dallas City, 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 Dallas City, September typically receives around 100 mm (4.0 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec5660979216813180751001235145
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Dallas City

In Dallas City in September, humidity is 78%. With an average temperature of 21°C (70°F), this humidity feels like a warm, enveloping blanket that can leave travelers feeling sticky and slightly fatigued, making it important to stay hydrated and take frequent breaks from outdoor activities.

September Average Humidity in Dallas City

This chart illustrates the average monthly humidity levels in Dallas City, 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 Dallas City is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%81%81%82%78%81%79%77%78%79%87%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Dallas City

In Dallas City 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 Dallas City.

Maximum UV Index Levels in Dallas City for September

The chart shows the monthly maximum UV Index (UVI) for Dallas City 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 Dallas City typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689111098642
Data source: Dallas City 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 Dallas City Compares to Other Months

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

This table compares monthly weather conditions in Dallas City, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)56 mm (2.2 inches)81%moderate
February Weather-2°C (29°F)60 mm (2.3 inches)81%moderate
March Weather5°C (42°F)97 mm (3.8 inches)81%high
April Weather10°C (51°F)92 mm (3.6 inches)82%very high
May Weather18°C (64°F)168 mm (6.6 inches)78%very high
June Weather24°C (75°F)131 mm (5.1 inches)81%extreme
July Weather26°C (78°F)79 mm (3.1 inches)79%very high
August Weather24°C (75°F)75 mm (3.0 inches)77%very high
September Weather21°C (70°F)100 mm (4.0 inches)78%very high
October Weather13°C (56°F)123 mm (4.8 inches)78%high
November Weather5°C (41°F)51 mm (2.0 inches)87%moderate
December Weather1°C (34°F)45 mm (1.8 inches)84%low

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