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September Weather in Coppell, United States

Last updated: June 24, 2025

In September, the average temperature in Coppell, United States is a warm 26°C (79°F). Expect a range that can dip to a chilly 10°C (51°F) and soar up to a scorching 37°C (100°F). With 89 mm (3.5 in) of precipitation spread across 8 days, you'll want to keep your umbrella handy. The air is comfortably humid, with an average humidity of 65%.

September Temperature in Coppell

In September in Coppell, the average temperature is 26°C (79°F). Maximum temperatures can reach as high as 37°C (100°F), while the minimum can drop to a chilly 10°C (51°F). Overall, travelers should be prepared for a warm climate with potential fluctuations, making it ideal for various outdoor activities as long as they dress accordingly.

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

The chart illustrates September temperature patterns in Coppell, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Coppell, September typically has an average temperature of 26°C (79°F), with highs reaching up to 37°C (100°F) and lows dropping to around 10°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec464960657481858479685651
Data source: Temperature data for Coppell 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 Coppell

In Coppell in September, the precipitation amount is 89 mm (3.5 in) over a span of 8 days.

September Precipitation Trends in Coppell

The chart displays monthly precipitation patterns in Coppell, 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 Coppell, September typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec5695112107160834396891415659
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Coppell

In Coppell in September, humidity is 65%. With an average temperature of 26°C (79°F), this humidity feels like a warm, enveloping blanket, making travel quite sticky and uncomfortable.

September Average Humidity in Coppell

This chart illustrates the average monthly humidity levels in Coppell, 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 Coppell 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 Coppell

In Coppell 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 Coppell.

Maximum UV Index Levels in Coppell for September

The chart shows the monthly maximum UV Index (UVI) for Coppell 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 Coppell typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111110864
Data source: Coppell 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 Coppell Compares to Other Months

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

This table compares monthly weather conditions in Coppell, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)56 mm (2.2 inches)80%moderate
February Weather9°C (49°F)95 mm (3.7 inches)79%high
March Weather16°C (60°F)112 mm (4.4 inches)78%very high
April Weather18°C (65°F)107 mm (4.2 inches)78%very high
May Weather24°C (75°F)160 mm (6.3 inches)81%extreme
June Weather27°C (82°F)83 mm (3.3 inches)78%extreme
July Weather30°C (85°F)43 mm (1.7 inches)73%extreme
August Weather29°C (85°F)96 mm (3.8 inches)66%extreme
September Weather26°C (79°F)89 mm (3.5 inches)65%very high
October Weather20°C (68°F)141 mm (5.5 inches)72%very high
November Weather13°C (56°F)56 mm (2.2 inches)82%high
December Weather11°C (51°F)59 mm (2.3 inches)87%moderate

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