September Weather in Cotulla, United States

Last updated: June 24, 2025

In Cotulla, United States, the average temperature in September hovers around 29°C (84°F). Expect a minimum of 15°C (60°F) and the mercury can rise as high as 41°C (106°F). During this time, you'll encounter approximately 116 mm (4.6 in) of precipitation spread over about 9 days, contributing to an average humidity level of 65%. Stay prepared for the warmth and occasional showers!

September Temperature in Cotulla

In September in Cotulla, the average temperature is 29°C (84°F). The maximum can reach 41°C (106°F), while the minimum can be as low as 15°C (60°F). It's essential to prepare for hot days and cooler nights when traveling during this time.

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

The chart illustrates September temperature patterns in Cotulla, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cotulla, September typically has an average temperature of 29°C (84°F), with highs reaching up to 41°C (106°F) and lows dropping to around 15°C (60°F).

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

September Precipitation in Cotulla

In Cotulla in September, the precipitation amount is 116 mm (4.6 in) spread over 9 days.

September Precipitation Trends in Cotulla

The chart displays monthly precipitation patterns in Cotulla, 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 Cotulla, September typically receives around 116 mm (4.6 inches) of precipitation spread over approximately 9 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 Cotulla

In Cotulla in September humidity is 65%. With average temperature 29°C (84°F), this humidity feels like a warm embrace, making outdoor activities comfortable yet requiring you to stay hydrated and take breaks in the shade.

September Average Humidity in Cotulla

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

In Cotulla 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 Cotulla.

Maximum UV Index Levels in Cotulla for September

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

Data source: Cotulla 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 Cotulla Compares to Other Months

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

This table compares monthly weather conditions in Cotulla, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	14°C (57°F)	22 mm (0.9 inches)	79%	moderate
February Weather	16°C (60°F)	29 mm (1.1 inches)	79%	very high
March Weather	21°C (70°F)	33 mm (1.3 inches)	74%	very high
April Weather	24°C (75°F)	46 mm (1.8 inches)	76%	extreme
May Weather	27°C (82°F)	108 mm (4.2 inches)	81%	extreme
June Weather	30°C (87°F)	45 mm (1.8 inches)	76%	extreme
July Weather	31°C (89°F)	48 mm (1.9 inches)	66%	extreme
August Weather	32°C (90°F)	31 mm (1.2 inches)	58%	extreme
September Weather	29°C (84°F)	116 mm (4.6 inches)	65%	extreme
October Weather	24°C (76°F)	52 mm (2.0 inches)	74%	very high
November Weather	18°C (65°F)	30 mm (1.2 inches)	81%	high
December Weather	15°C (60°F)	23 mm (0.9 inches)	86%	moderate