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April Weather in San Antonio, Mexico

Last updated: August 26, 2025

In April, the average temperature in San Antonio, Mexico is a warm 27°C (81°F), with a comfortable minimum of 22°C (72°F) and a delightful maximum reaching 33°C (91°F). Expect minimal precipitation, with only 1 mm (0.0 in) falling over 0 days. The average humidity sits at a pleasant 62%, making it an ideal time to enjoy the outdoors!

April Temperature in San Antonio

In April in San Antonio, the average temperature is 27°C (81°F). The maximum can reach 33°C (91°F), while the minimum can dip to as low as 22°C (72°F). This climate makes San Antonio an ideal destination for travelers seeking warm and pleasant weather during this time of year.

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

The chart illustrates April 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, April typically has an average temperature of 27°C (81°F), with highs reaching up to 33°C (91°F) and lows dropping to around 22°C (72°F).
JanFebMarAprMayJunJulAugSepOctNovDec807980818282838281818180
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.

April Precipitation in San Antonio

In San Antonio in April, the precipitation amount is 1 mm (0.0 in) during a span of 0 days.

April Precipitation Trends in San Antonio

The chart displays monthly precipitation patterns in San Antonio, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In San Antonio, April typically receives around 1 mm (0.0 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec210113235952842992133717
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in San Antonio

In San Antonio in April humidity is 62%. With an average temperature of 27°C (81°F), this humidity feels like walking through a warm, soft blanket, making travel feel both cozy and slightly sluggish as you navigate through the warmth.

April Average Humidity in San Antonio

This chart illustrates the average monthly humidity levels in San Antonio, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in San Antonio is approximately 62%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec65%61%59%62%73%78%79%82%82%79%72%70%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in San Antonio

In San Antonio in April, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in San Antonio.

Maximum UV Index Levels in San Antonio for April

The chart shows the monthly maximum UV Index (UVI) for San Antonio in April, 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 April, the maximum UV index in San Antonio typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911131313141313131198
Data source: San Antonio April 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 April 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 April’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 April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (80°F)2 mm (0.1 inches)65%very high
February Weather26°C (80°F)1 mm (0.0 inches)61%extreme
March Weather27°C (80°F)0 mm (0.0 inches)59%extreme
April Weather27°C (81°F)1 mm (0.0 inches)62%extreme
May Weather28°C (82°F)13 mm (0.5 inches)73%extreme
June Weather28°C (82°F)235 mm (9.3 inches)78%extreme
July Weather28°C (83°F)95 mm (3.8 inches)79%extreme
August Weather28°C (82°F)284 mm (11.2 inches)82%extreme
September Weather27°C (81°F)299 mm (11.8 inches)82%extreme
October Weather27°C (81°F)212 mm (8.4 inches)79%extreme
November Weather27°C (81°F)37 mm (1.5 inches)72%very high
December Weather27°C (80°F)17 mm (0.7 inches)70%very high

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