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April Weather in San Antonio, Mexico

Last updated: August 27, 2025

In San Antonio, Mexico, the average temperature in April hovers around 20°C (68°F). However, be prepared for temperature fluctuations, with a low of 7°C (44°F) and highs reaching up to 32°C (90°F). The region experiences minimal rainfall, with only 3 mm (0.1 in) of precipitation expected over 1 day. Expect a pleasant atmosphere with an average humidity of 60%, making it a great time to explore.

April Temperature in San Antonio

In April in San Antonio, the average temperature is 20°C (68°F), with maximums reaching up to 32°C (90°F) and minimums dropping as low as 7°C (44°F). It's a comfortable time for travel, offering a nice balance of warm days and cooler evenings.

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 20°C (68°F), with highs reaching up to 32°C (90°F) and lows dropping to around 7°C (44°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.

April Precipitation in San Antonio

In San Antonio in April, the precipitation amount is 3 mm (0.1 in) over the course of 1 day.

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 3 mm (0.1 inches) of precipitation spread over approximately 1 days.
JanFebMarAprMayJunJulAugSepOctNovDec132173462324203833471453815
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 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.

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 60%, 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 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 an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. 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 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec9111415141413131412108
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 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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