September Weather in Bandera, United States

Last updated: June 24, 2025

In Bandera, United States, the average temperature in September is a warm 26°C (78°F). Expect a range from a cool 10°C (51°F) to a sizzling 38°C (100°F). During this month, precipitation averages 118 mm (4.6 in) over about 10 days, with an average humidity level of 65%. Be prepared for both sunny days and occasional showers!

September Temperature in Bandera

In September in Bandera, the average temperature is 26°C (78°F). Maximum can reach 38°C (100°F) and minimum can be as low as 10°C (51°F). This means travelers should be prepared for both warm days and cooler evenings, making it a great time to explore outdoor activities while layering up for the night.

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

The chart illustrates September temperature patterns in Bandera, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bandera, September typically has an average temperature of 26°C (78°F), with highs reaching up to 38°C (100°F) and lows dropping to around 10°C (51°F).

Data source: Temperature data for Bandera generated using information from the Copernicus Climate Change Service.

September Precipitation in Bandera

In Bandera in September, the total precipitation amount is 118 mm (4.6 in) over a span of 10 days.

September Precipitation Trends in Bandera

The chart displays monthly precipitation patterns in Bandera, 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 Bandera, September typically receives around 118 mm (4.6 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Bandera

In Bandera in September, humidity is 65%. With an average temperature of 26°C (78°F), this humidity feels like a warm, muggy embrace that can make outdoor activities a bit challenging, often leaving travelers feeling sticky and in need of frequent breaks in the shade.

September Average Humidity in Bandera

This chart illustrates the average monthly humidity levels in Bandera, 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 Bandera is approximately 65%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Bandera

In Bandera in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Bandera.

Maximum UV Index Levels in Bandera for September

The chart shows the monthly maximum UV Index (UVI) for Bandera 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 Bandera typically reaches 11, which falls under the extreme exposure category.

Data source: Bandera 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 Bandera Compares to Other Months

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

This table compares monthly weather conditions in Bandera, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (51°F)	43 mm (1.7 inches)	79%	moderate
February Weather	12°C (53°F)	55 mm (2.1 inches)	79%	very high
March Weather	17°C (63°F)	63 mm (2.5 inches)	74%	very high
April Weather	20°C (68°F)	75 mm (3.0 inches)	76%	extreme
May Weather	24°C (75°F)	131 mm (5.2 inches)	81%	extreme
June Weather	27°C (81°F)	73 mm (2.9 inches)	76%	extreme
July Weather	28°C (83°F)	53 mm (2.1 inches)	66%	extreme
August Weather	29°C (84°F)	55 mm (2.2 inches)	58%	extreme
September Weather	26°C (78°F)	118 mm (4.6 inches)	65%	extreme
October Weather	21°C (70°F)	81 mm (3.2 inches)	74%	very high
November Weather	15°C (59°F)	34 mm (1.3 inches)	81%	high
December Weather	12°C (54°F)	44 mm (1.7 inches)	86%	moderate