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April Weather in San Antonio, Peru

Last updated: August 27, 2025

In April, the average temperature in San Antonio, Peru hovers around 18°C (65°F). Expect a cozy range with minimums dropping to 12°C (53°F) and highs peaking at 25°C (78°F). While you're enjoying the mild climate, be prepared for 8 mm (0.3 in) of precipitation over 1 day, contributing to an average humidity of a brisk 91%.

April Temperature in San Antonio

In April in San Antonio, the average temperature is 18°C (65°F). Maximum can reach 25°C (78°F), and minimum can be as low as 12°C (53°F). This mild climate makes San Antonio an ideal destination for outdoor activities and sightseeing 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 18°C (65°F), with highs reaching up to 25°C (78°F) and lows dropping to around 12°C (53°F).
JanFebMarAprMayJunJulAugSepOctNovDec646464646463636464656464
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 8 mm (0.3 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 8 mm (0.3 inches) of precipitation spread over approximately 1 days.
JanFebMarAprMayJunJulAugSepOctNovDec8389578001001413
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 91%. With an average temperature of 18°C (65°F), this humidity feels like a thick blanket wrapping around you, making travel feel sticky and draining.

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 91%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%90%90%91%88%76%61%57%59%75%84%84%
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 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 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 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec16161514119101214161716
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 Weather18°C (64°F)83 mm (3.3 inches)89%extreme
February Weather18°C (64°F)89 mm (3.5 inches)90%extreme
March Weather18°C (64°F)57 mm (2.3 inches)90%extreme
April Weather18°C (65°F)8 mm (0.3 inches)91%extreme
May Weather18°C (65°F)0 mm (0.0 inches)88%extreme
June Weather17°C (63°F)0 mm (0.0 inches)76%very high
July Weather17°C (63°F)1 mm (0.0 inches)61%very high
August Weather18°C (64°F)0 mm (0.0 inches)57%extreme
September Weather18°C (65°F)0 mm (0.0 inches)58%extreme
October Weather18°C (65°F)1 mm (0.0 inches)75%extreme
November Weather18°C (64°F)4 mm (0.1 inches)83%extreme
December Weather18°C (65°F)13 mm (0.5 inches)84%extreme

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