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April Weather in San Juan, Mexico

Last updated: August 27, 2025

In San Juan, Mexico, the average temperature in April hovers around 22°C (72°F), with a comfortable average humidity of 56%. Expect milder moments as temperatures can dip to a refreshing 7°C (45°F) at the lowest, while the mercury may rise to a toasty 34°C (94°F) at its peak. With just 1 mm (0.0 in) of precipitation across 0 days, you can anticipate plenty of sunshine!

April Temperature in San Juan

In April in San Juan, the average temperature is 22°C (72°F). The maximum can reach 34°C (94°F) and the minimum can be as low as 7°C (45°F). This diverse temperature range makes it a great time for travelers to enjoy a mix of warm and cooler experiences.

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

The chart illustrates April temperature patterns in San Juan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Juan, April typically has an average temperature of 22°C (72°F), with highs reaching up to 34°C (94°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec636468727678767675746964
Data source: Temperature data for San Juan 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 Juan

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

April Precipitation Trends in San Juan

The chart displays monthly precipitation patterns in San Juan, 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 Juan, April typically receives around 1 mm (0.0 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec113721273217255166681324
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in San Juan

In San Juan in April humidity is 56%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, making it quite comfortable for traveling while also adding a touch of stickiness that encourages you to hydrate and seek out refreshing breaks in the shade.

April Average Humidity in San Juan

This chart illustrates the average monthly humidity levels in San Juan, 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 Juan is approximately 56%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%66%61%56%61%73%82%83%83%79%77%78%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in San Juan

In San Juan 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 Juan.

Maximum UV Index Levels in San Juan for April

The chart shows the monthly maximum UV Index (UVI) for San Juan 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 Juan typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec710111313121212121186
Data source: San Juan 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 Juan Compares to Other Months

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

This table compares monthly weather conditions in San Juan, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather17°C (63°F)11 mm (0.4 inches)74%high
February Weather18°C (65°F)37 mm (1.5 inches)66%very high
March Weather20°C (68°F)2 mm (0.1 inches)61%extreme
April Weather22°C (72°F)1 mm (0.0 inches)56%extreme
May Weather24°C (76°F)2 mm (0.1 inches)61%extreme
June Weather26°C (78°F)73 mm (2.9 inches)73%extreme
July Weather24°C (76°F)217 mm (8.6 inches)82%extreme
August Weather25°C (76°F)255 mm (10.0 inches)83%extreme
September Weather24°C (75°F)166 mm (6.5 inches)83%extreme
October Weather23°C (74°F)68 mm (2.7 inches)78%extreme
November Weather21°C (69°F)13 mm (0.5 inches)77%very high
December Weather18°C (64°F)24 mm (0.9 inches)78%high

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