September Weather in Challenge-Brownsville, United States

Last updated: June 24, 2025

In Challenge-Brownsville, United States, the average temperature in September hovers around 22°C (71°F), offering a pleasant climate for outdoor activities. However, temperatures can vary significantly, dipping as low as 5°C (42°F) and soaring to a scorching 41°C (107°F). Expect 18 mm (0.7 in) of precipitation over 2 days, with average humidity levels at a comfortable 44%. Enjoy the diverse weather that this vibrant locale has to offer!

September Temperature in Challenge-Brownsville

In September in Challenge-Brownsville, the average temperature is 22°C (71°F). Maximum temperatures can reach up to 41°C (107°F), while the minimum can drop as low as 5°C (42°F). Be prepared for a wide range of temperatures, making it ideal for both warm-day activities and cooler evening outings.

September Weather in Challenge-Brownsville: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Challenge-Brownsville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Challenge-Brownsville, September typically has an average temperature of 22°C (71°F), with highs reaching up to 41°C (107°F) and lows dropping to around 5°C (42°F).

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

September Precipitation in Challenge-Brownsville

In Challenge-Brownsville in September, the precipitation amount is 18 mm (0.7 in) over the course of 2 days.

September Precipitation Trends in Challenge-Brownsville

The chart displays monthly precipitation patterns in Challenge-Brownsville, 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 Challenge-Brownsville, September typically receives around 18 mm (0.7 inches) of precipitation spread over approximately 2 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 Challenge-Brownsville

In Challenge-Brownsville in September, humidity is 44%. With an average temperature of 22°C (71°F), this humidity feels like a refreshing embrace, making it pleasant for traveling and exploring the sights without discomfort.

September Average Humidity in Challenge-Brownsville

This chart illustrates the average monthly humidity levels in Challenge-Brownsville, 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 Challenge-Brownsville is approximately 44%, 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 Challenge-Brownsville

In Challenge-Brownsville 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 Challenge-Brownsville.

Maximum UV Index Levels in Challenge-Brownsville for September

The chart shows the monthly maximum UV Index (UVI) for Challenge-Brownsville 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 Challenge-Brownsville typically reaches 9, which falls under the very high exposure category.

Data source: Challenge-Brownsville 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 Challenge-Brownsville Compares to Other Months

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

This table compares monthly weather conditions in Challenge-Brownsville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (46°F)	269 mm (10.6 inches)	84%	moderate
February Weather	8°C (47°F)	289 mm (11.4 inches)	84%	moderate
March Weather	10°C (50°F)	242 mm (9.5 inches)	83%	very high
April Weather	14°C (57°F)	124 mm (4.9 inches)	81%	very high
May Weather	17°C (64°F)	64 mm (2.5 inches)	74%	extreme
June Weather	23°C (74°F)	10 mm (0.4 inches)	64%	extreme
July Weather	26°C (80°F)	1 mm (0.0 inches)	44%	extreme
August Weather	25°C (78°F)	1 mm (0.0 inches)	36%	very high
September Weather	22°C (71°F)	18 mm (0.7 inches)	44%	very high
October Weather	16°C (61°F)	80 mm (3.1 inches)	65%	high
November Weather	11°C (52°F)	153 mm (6.0 inches)	84%	moderate
December Weather	7°C (45°F)	218 mm (8.6 inches)	83%	moderate