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September Weather in Rowlett, United States

Last updated: June 24, 2025

In September, the average temperature in Rowlett, United States hovers around 26°C (79°F). Expect a minimum of 10°C (51°F) and a maximum soaring to 37°C (99°F). With an average humidity of 65%, you'll feel comfortably warm despite experiencing around 89 mm (3.5 in) of precipitation spread over 8 days.

September Temperature in Rowlett

In September in Rowlett, the average temperature is 26°C (79°F). Maximum temperatures can reach 37°C (99°F), while minimums can dip as low as 10°C (51°F). It's a great time to explore Rowlett with a mix of warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Rowlett, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rowlett, September typically has an average temperature of 26°C (79°F), with highs reaching up to 37°C (99°F) and lows dropping to around 10°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec464960657481848479675651
Data source: Temperature data for Rowlett 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 Rowlett

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

September Precipitation Trends in Rowlett

The chart displays monthly precipitation patterns in Rowlett, 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 Rowlett, September typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec64111121138181915595891485873
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Rowlett

In Rowlett 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 Rowlett

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

In Rowlett 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 Rowlett.

Maximum UV Index Levels in Rowlett for September

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

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

This table compares monthly weather conditions in Rowlett, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)64 mm (2.5 inches)80%moderate
February Weather9°C (49°F)111 mm (4.4 inches)79%high
March Weather15°C (60°F)121 mm (4.8 inches)78%very high
April Weather18°C (65°F)138 mm (5.4 inches)78%very high
May Weather23°C (74°F)180 mm (7.1 inches)81%extreme
June Weather27°C (81°F)91 mm (3.6 inches)78%extreme
July Weather29°C (85°F)55 mm (2.2 inches)73%extreme
August Weather29°C (84°F)95 mm (3.7 inches)66%extreme
September Weather26°C (79°F)89 mm (3.5 inches)65%very high
October Weather20°C (68°F)148 mm (5.8 inches)72%very high
November Weather13°C (56°F)58 mm (2.3 inches)82%high
December Weather11°C (51°F)73 mm (2.9 inches)87%moderate

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