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March Weather in San Juan, Mexico

Last updated: August 27, 2025

In March, the average temperature in San Juan, Mexico is a pleasant 18°C (65°F), with temperatures ranging from a cool 4°C (39°F) to a warm 33°C (92°F). You can expect to see a modest precipitation amount of 5 mm (0.2 in) over the course of 1 day, accompanied by an average humidity level of 49%. Enjoy the diverse weather this month brings!

March Temperature in San Juan

In March in San Juan, the average temperature is 18°C (65°F), with maximums reaching 33°C (92°F) and minimums dipping as low as 4°C (39°F). This diverse range of temperatures makes San Juan an ideal destination for travelers seeking both warm sunny days and cooler evenings.

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 18°C (65°F), with highs reaching up to 33°C (92°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec545964687170686865635955
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 precipitation amount is 5 mm (0.2 in) over a duration of 1 day.

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 5 mm (0.2 inches) of precipitation spread over approximately 1 days.
JanFebMarAprMayJunJulAugSepOctNovDec17957197712065119421612
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 49%. With an average temperature of 18°C (65°F), this humidity feels like a refreshing breeze, making it pleasant for traveling and exploring the sights without feeling overheated.

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 49%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec71%64%49%47%55%77%82%83%86%83%80%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 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 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 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec8111314151414141412108
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 Weather12°C (55°F)17 mm (0.7 inches)71%very high
February Weather15°C (59°F)9 mm (0.3 inches)64%extreme
March Weather18°C (65°F)5 mm (0.2 inches)49%extreme
April Weather20°C (68°F)7 mm (0.3 inches)47%extreme
May Weather22°C (72°F)19 mm (0.8 inches)55%extreme
June Weather21°C (71°F)77 mm (3.0 inches)77%extreme
July Weather20°C (68°F)120 mm (4.7 inches)82%extreme
August Weather20°C (69°F)65 mm (2.6 inches)83%extreme
September Weather18°C (65°F)119 mm (4.7 inches)86%extreme
October Weather17°C (64°F)42 mm (1.7 inches)83%extreme
November Weather15°C (59°F)15 mm (0.6 inches)80%very high
December Weather13°C (55°F)12 mm (0.5 inches)83%very high

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