September Weather in Schertz, United States

Last updated: June 24, 2025

In September, the average temperature in Schertz, United States sits at a warm 27°C (81°F). Expect minimums of 12°C (54°F) and maximums reaching up to 38°C (101°F). With an average humidity of 65%, you may feel the heat! However, be prepared for some rain, as 119 mm (4.7 in) of precipitation typically falls over 11 days.

September Temperature in Schertz

In September, in Schertz, the average temperature is 27°C (81°F), with maximums reaching up to 38°C (101°F) and minimums dropping as low as 12°C (54°F). This makes it an ideal time for travelers seeking warm weather while also enjoying a pleasant range of temperatures for outdoor activities.

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

The chart illustrates September temperature patterns in Schertz, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Schertz, September typically has an average temperature of 27°C (81°F), with highs reaching up to 38°C (101°F) and lows dropping to around 12°C (54°F).

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

September Precipitation in Schertz

In Schertz in September, the total precipitation amount is 119 mm (4.7 in), which occurs over the course of 11 days.

September Precipitation Trends in Schertz

The chart displays monthly precipitation patterns in Schertz, 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 Schertz, September typically receives around 119 mm (4.7 inches) of precipitation spread over approximately 11 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 Schertz

In Schertz in September, humidity is 65%. With an average temperature of 27°C (81°F), this humidity feels like a warm embrace, making travel feel both refreshing and slightly sticky as you explore the sights and sounds around you.

September Average Humidity in Schertz

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

In Schertz 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 Schertz.

Maximum UV Index Levels in Schertz for September

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

Data source: Schertz 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 Schertz Compares to Other Months

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

This table compares monthly weather conditions in Schertz, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (53°F)	44 mm (1.7 inches)	79%	moderate
February Weather	13°C (55°F)	56 mm (2.2 inches)	79%	very high
March Weather	18°C (65°F)	58 mm (2.3 inches)	74%	very high
April Weather	21°C (70°F)	75 mm (3.0 inches)	76%	extreme
May Weather	25°C (78°F)	126 mm (5.0 inches)	81%	extreme
June Weather	28°C (83°F)	84 mm (3.3 inches)	76%	extreme
July Weather	29°C (85°F)	73 mm (2.9 inches)	66%	extreme
August Weather	30°C (86°F)	69 mm (2.7 inches)	58%	extreme
September Weather	27°C (81°F)	119 mm (4.7 inches)	65%	extreme
October Weather	22°C (72°F)	88 mm (3.4 inches)	74%	very high
November Weather	16°C (61°F)	49 mm (1.9 inches)	81%	high
December Weather	13°C (56°F)	57 mm (2.3 inches)	86%	moderate