March Weather in San Antonio, Mexico

Last updated: August 27, 2025

In March, the average temperature in San Antonio, Mexico is a pleasant 20°C (68°F). During this time, temperatures can range from a chilly 9°C (49°F) to a warm 32°C (90°F). Expect light rainfall, with about 5 mm (0.2 in) of precipitation over just 1 day of the month. Humidity levels hover around 60%, adding a comfortable ambiance to the climate.

March Temperature in San Antonio

In March in San Antonio, the average temperature is 20°C (68°F). Maximums can reach 32°C (90°F) and minimums can be as low as 9°C (49°F). This makes it a pleasant time for travelers seeking mild weather for outdoor activities and exploration.

March Weather in San Antonio: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in San Antonio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Antonio, March typically has an average temperature of 20°C (68°F), with highs reaching up to 32°C (90°F) and lows dropping to around 9°C (49°F).

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

March Precipitation in San Antonio

In San Antonio in March, the precipitation amount is 5 mm (0.2 in) over a duration of 1 day.

March Precipitation Trends in San Antonio

The chart displays monthly precipitation patterns in San Antonio, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In San Antonio, March typically receives around 5 mm (0.2 inches) of precipitation spread over approximately 1 days.

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

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Millimeters (mm) Inches (in)

March Humidity in San Antonio

In San Antonio in March, humidity is 60%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace, making traveling quite comfortable yet slightly sticky, perfect for leisurely strolls but reminding you to stay hydrated.

March Average Humidity in San Antonio

This chart illustrates the average monthly humidity levels in San Antonio, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in San Antonio is approximately 60%, offering insight into how humid the weather typically is during this month.

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

March UV Index in San Antonio

In San Antonio in March, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in San Antonio.

Maximum UV Index Levels in San Antonio for March

The chart shows the monthly maximum UV Index (UVI) for San Antonio in March, 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 March, the maximum UV index in San Antonio typically reaches 10, which falls under the very high exposure category.

Data source: San Antonio March 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 March Weather in San Antonio Compares to Other Months

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

This table compares monthly weather conditions in San Antonio, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	18°C (64°F)	13 mm (0.5 inches)	74%	high
February Weather	18°C (65°F)	9 mm (0.4 inches)	67%	very high
March Weather	20°C (68°F)	5 mm (0.2 inches)	60%	very high
April Weather	23°C (73°F)	0 mm (0.0 inches)	51%	extreme
May Weather	25°C (78°F)	0 mm (0.0 inches)	47%	extreme
June Weather	29°C (84°F)	18 mm (0.7 inches)	50%	extreme
July Weather	31°C (88°F)	36 mm (1.4 inches)	70%	extreme
August Weather	31°C (88°F)	73 mm (2.9 inches)	81%	extreme
September Weather	30°C (86°F)	77 mm (3.0 inches)	82%	extreme
October Weather	28°C (83°F)	20 mm (0.8 inches)	78%	very high
November Weather	24°C (75°F)	28 mm (1.1 inches)	78%	high
December Weather	19°C (66°F)	16 mm (0.6 inches)	80%	moderate