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March Weather in San Juan, Peru

Last updated: August 27, 2025

In March, the average temperature in San Juan, Peru hovers around 8°C (47°F), with lows dipping to -2°C (29°F) and highs reaching up to 18°C (64°F). Expect significant moisture, with an average precipitation of 323 mm (12.7 in) over 30 days, accompanied by a humidity level of around 90%. Be prepared for a chilly and wet month!

March Temperature in San Juan

In March in San Juan, the average temperature is 8°C (47°F). The maximum can reach 18°C (64°F), and the minimum can be as low as -2°C (29°F). Travelers should prepare for a mix of cool and mild weather during this time.

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

The chart illustrates March 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, March typically has an average temperature of 8°C (47°F), with highs reaching up to 18°C (64°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec474747454443424345464647
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.

March Precipitation in San Juan

In San Juan in March, the total precipitation amount is 323 mm (12.7 in) over a span of 30 days.

March Precipitation Trends in San Juan

The chart displays monthly precipitation patterns in San Juan, 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 Juan, March typically receives around 323 mm (12.7 inches) of precipitation spread over approximately 30 days.
JanFebMarAprMayJunJulAugSepOctNovDec254268323142724941369310683146
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in San Juan

In San Juan in March, humidity is 90%. With an average temperature of 8°C (47°F), this humidity feels like a damp chill enveloping you, making even short walks outside feel uncomfortable and heavy, as if the air is thick with moisture.

March Average Humidity in San Juan

This chart illustrates the average monthly humidity levels in San Juan, 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 Juan is approximately 90%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%90%90%90%84%67%53%47%53%67%75%83%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in San Juan

In San Juan in March, the maximum UV index is 18, which corresponds to an extreme exposure category. This means that the time to burn is just 10 minutes. For more detailed information, you can check the hourly UV index in San Juan.

Maximum UV Index Levels in San Juan for March

The chart shows the monthly maximum UV Index (UVI) for San Juan 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 Juan typically reaches 18, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec181818161311121416171818
Data source: San Juan 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 Juan Compares to Other Months

Weather in San Juan varies notably across the year, with each month offering distinct climate conditions. This page compares March’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 March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)254 mm (10.0 inches)89%extreme
February Weather8°C (47°F)268 mm (10.6 inches)90%extreme
March Weather8°C (47°F)323 mm (12.7 inches)90%extreme
April Weather7°C (46°F)142 mm (5.6 inches)90%extreme
May Weather6°C (44°F)72 mm (2.8 inches)84%extreme
June Weather6°C (43°F)49 mm (1.9 inches)67%extreme
July Weather6°C (43°F)41 mm (1.6 inches)53%extreme
August Weather6°C (44°F)35 mm (1.4 inches)47%extreme
September Weather7°C (46°F)93 mm (3.7 inches)53%extreme
October Weather8°C (46°F)106 mm (4.2 inches)67%extreme
November Weather8°C (47°F)83 mm (3.3 inches)75%extreme
December Weather8°C (47°F)146 mm (5.7 inches)82%extreme

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