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March Weather in San Antonio, Mexico

Last updated: August 27, 2025

In San Antonio, Mexico, the average temperature in March is a comfortable 19°C (66°F). Expect a minimum of 6°C (43°F) and a maximum of 31°C (87°F) during this time. The area sees a modest 7 mm (0.3 in) of precipitation over 1 day, with an average humidity of 59%.

March Temperature in San Antonio

In March in San Antonio, the average temperature is 19°C (66°F), with maximums reaching up to 31°C (87°F) and minimums dropping as low as 6°C (43°F). This makes it an ideal time for travelers seeking pleasant weather and a variety of outdoor activities.

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 19°C (66°F), with highs reaching up to 31°C (87°F) and lows dropping to around 6°C (43°F).
JanFebMarAprMayJunJulAugSepOctNovDec596266687068666666666360
Data source: Temperature data for San Antonio generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

March Precipitation in San Antonio

In San Antonio in March, the precipitation amount is 7 mm (0.3 in) over the course 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 7 mm (0.3 inches) of precipitation spread over approximately 1 days.
JanFebMarAprMayJunJulAugSepOctNovDec132173462324203833471453815
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in San Antonio

In San Antonio in March, humidity is 59%. With an average temperature of 19°C (66°F), this humidity feels like a mild cloak wrapping around you while traveling, creating a pleasant yet refreshing atmosphere that invites you to explore the surroundings without feeling overly sticky or uncomfortable.

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 59%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec70%65%59%60%67%80%81%83%83%80%77%76%
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 is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in San Antonio, you can check here.

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 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec9111415141413131412108
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.
 TemperaturePrecipitationHumidityUV
January Weather15°C (60°F)13 mm (0.5 inches)70%very high
February Weather16°C (62°F)21 mm (0.8 inches)65%extreme
March Weather19°C (66°F)7 mm (0.3 inches)59%extreme
April Weather20°C (68°F)3 mm (0.1 inches)60%extreme
May Weather21°C (70°F)46 mm (1.8 inches)67%extreme
June Weather20°C (69°F)231 mm (9.1 inches)80%extreme
July Weather19°C (66°F)420 mm (16.5 inches)81%extreme
August Weather19°C (66°F)383 mm (15.1 inches)83%extreme
September Weather19°C (66°F)347 mm (13.7 inches)83%extreme
October Weather19°C (66°F)145 mm (5.7 inches)80%extreme
November Weather17°C (63°F)38 mm (1.5 inches)77%very high
December Weather15°C (60°F)15 mm (0.6 inches)76%very high

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