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September Weather in Bryan, United States

Last updated: June 24, 2025

In September, the average temperature in Bryan, United States hovers around 27°C (81°F), making it a warm destination. Expect a minimum temperature of 11°C (52°F) and a maximum of 40°C (104°F), so be prepared for a range of conditions. With precipitation amounting to 105 mm (4.1 in) over 11 days, and an average humidity level of 69%, it’s wise to pack accordingly for both warmth and potential showers.

September Temperature in Bryan

In September in Bryan, the average temperature is 27°C (81°F). Maximum temperatures can reach 40°C (104°F), while minimums can drop to as low as 11°C (52°F). Be prepared for warm weather and pack accordingly for both hot days and cooler evenings.

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

The chart illustrates September temperature patterns in Bryan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bryan, September typically has an average temperature of 27°C (81°F), with highs reaching up to 40°C (104°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec525464687682858681716055
Data source: Temperature data for Bryan 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 Bryan

In Bryan in September, the precipitation amount is 105 mm (4.1 in) over the course of 11 days.

September Precipitation Trends in Bryan

The chart displays monthly precipitation patterns in Bryan, 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 Bryan, September typically receives around 105 mm (4.1 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec7791821491571177112210510681105
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Bryan

In Bryan in September, humidity is 69%. With an average temperature of 27°C (81°F), this humidity feels like a warm blanket wrapped around you, making it essential to stay hydrated and take frequent breaks during your travels.

September Average Humidity in Bryan

This chart illustrates the average monthly humidity levels in Bryan, 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 Bryan is approximately 69%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%80%78%79%81%77%71%67%69%73%82%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Bryan

In Bryan 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 Bryan.

Maximum UV Index Levels in Bryan for September

The chart shows the monthly maximum UV Index (UVI) for Bryan 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 Bryan typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589111112121110864
Data source: Bryan 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 Bryan Compares to Other Months

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

This table compares monthly weather conditions in Bryan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (52°F)77 mm (3.0 inches)79%moderate
February Weather12°C (54°F)91 mm (3.6 inches)80%very high
March Weather18°C (64°F)82 mm (3.2 inches)78%very high
April Weather20°C (68°F)149 mm (5.9 inches)79%extreme
May Weather25°C (77°F)157 mm (6.2 inches)81%extreme
June Weather28°C (82°F)117 mm (4.6 inches)77%extreme
July Weather30°C (86°F)71 mm (2.8 inches)71%extreme
August Weather30°C (86°F)121 mm (4.8 inches)67%extreme
September Weather27°C (81°F)105 mm (4.1 inches)69%very high
October Weather22°C (71°F)106 mm (4.2 inches)73%very high
November Weather16°C (60°F)81 mm (3.2 inches)82%high
December Weather13°C (56°F)105 mm (4.1 inches)87%moderate

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