March Weather in San Juan, Mexico

Last updated: August 27, 2025

In March, the average temperature in San Juan, Mexico hovers around 27°C (81°F). Expect a cozy range, with minimums dipping to 19°C (67°F) and maximums soaring to 36°C (97°F). This month brings an average precipitation of 20 mm (0.8 in) over about 5 days, contributing to a comfortable humidity level of 76%.

March Temperature in San Juan

In March in San Juan, the average temperature is 27°C (81°F). Maximums can reach 36°C (97°F), and minimums can be as low as 19°C (67°F). This makes it an ideal time for travelers seeking warm weather and outdoor activities.

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 27°C (81°F), with highs reaching up to 36°C (97°F) and lows dropping to around 19°C (67°F).

Data source: Temperature data for San Juan generated using information from the Copernicus Climate Change Service.

March Precipitation in San Juan

In San Juan in March, the precipitation amount is 20 mm (0.8 in) over a period of 5 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 20 mm (0.8 inches) of precipitation spread over approximately 5 days.

Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

March Humidity in San Juan

In San Juan in March, humidity is 76%. With an average temperature of 27°C (81°F), this humidity feels like a warm blanket enveloping you, making outdoor activities feel stifling and sweat-inducing, which can be challenging for traveling.

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 76%, offering insight into how humid the weather typically is during this month.

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 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. 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 12, which falls under the extreme exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	24°C (76°F)	68 mm (2.7 inches)	81%	very high
February Weather	26°C (78°F)	24 mm (0.9 inches)	80%	extreme
March Weather	27°C (81°F)	20 mm (0.8 inches)	76%	extreme
April Weather	29°C (84°F)	31 mm (1.2 inches)	74%	extreme
May Weather	30°C (87°F)	45 mm (1.8 inches)	74%	extreme
June Weather	29°C (84°F)	252 mm (9.9 inches)	74%	extreme
July Weather	30°C (85°F)	54 mm (2.1 inches)	79%	extreme
August Weather	29°C (85°F)	108 mm (4.2 inches)	80%	extreme
September Weather	28°C (84°F)	184 mm (7.2 inches)	79%	extreme
October Weather	28°C (82°F)	235 mm (9.3 inches)	81%	extreme
November Weather	26°C (79°F)	138 mm (5.5 inches)	84%	very high
December Weather	25°C (77°F)	54 mm (2.1 inches)	85%	very high