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September Weather in Bastrop, United States

Last updated: June 24, 2025

In September, the average temperature in Bastrop, United States hovers around 26°C (79°F), making it quite pleasant. However, be prepared for a temperature range that can dip as low as 12°C (53°F) and soar up to 39°C (102°F). During this month, expect about 78 mm (3.1 in) of precipitation over 8 days, with an average humidity level of 73%, creating a warm and somewhat humid climate.

September Temperature in Bastrop

In September in Bastrop, the average temperature is 26°C (79°F). Maximum temperatures can reach up to 39°C (102°F), while minimum temperatures can drop as low as 12°C (53°F). Be prepared for a warm climate with occasional cool evenings when traveling to Bastrop during this month.

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

The chart illustrates September temperature patterns in Bastrop, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bastrop, September typically has an average temperature of 26°C (79°F), with highs reaching up to 39°C (102°F) and lows dropping to around 12°C (53°F).
JanFebMarAprMayJunJulAugSepOctNovDec485161657480838279685552
Data source: Temperature data for Bastrop 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 Bastrop

In Bastrop in September, the total precipitation amount is 78 mm (3.1 in) over the course of 8 days.

September Precipitation Trends in Bastrop

The chart displays monthly precipitation patterns in Bastrop, 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 Bastrop, September typically receives around 78 mm (3.1 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec12719415818213511798937814185117
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Bastrop

In Bastrop in September, humidity is 73%. With an average temperature of 26°C (79°F), this humidity feels like a warm, sticky embrace, making travel slightly uncomfortable as you navigate through the heat with a constant sheen of sweat on your skin.

September Average Humidity in Bastrop

This chart illustrates the average monthly humidity levels in Bastrop, 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 Bastrop is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%80%82%83%80%80%75%73%76%84%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Bastrop

In Bastrop in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Bastrop.

Maximum UV Index Levels in Bastrop for September

The chart shows the monthly maximum UV Index (UVI) for Bastrop 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 Bastrop typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec47811111212119864
Data source: Bastrop 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 Bastrop Compares to Other Months

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

This table compares monthly weather conditions in Bastrop, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (48°F)127 mm (5.0 inches)84%moderate
February Weather11°C (52°F)194 mm (7.6 inches)83%high
March Weather16°C (61°F)158 mm (6.2 inches)80%very high
April Weather18°C (65°F)182 mm (7.2 inches)82%extreme
May Weather23°C (74°F)135 mm (5.3 inches)83%extreme
June Weather27°C (80°F)117 mm (4.6 inches)80%extreme
July Weather28°C (83°F)98 mm (3.9 inches)80%extreme
August Weather28°C (83°F)93 mm (3.7 inches)75%extreme
September Weather26°C (79°F)78 mm (3.1 inches)73%very high
October Weather20°C (68°F)141 mm (5.6 inches)76%very high
November Weather13°C (55°F)85 mm (3.3 inches)84%high
December Weather11°C (52°F)117 mm (4.6 inches)88%moderate

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