March Weather in San Juan, Mexico

Last updated: August 27, 2025

In San Juan, Mexico, the average temperature in March typically hovers around 20°C (68°F). You'll enjoy pleasant conditions, with temperatures ranging from a cool 5°C (41°F) to a warm 33°C (91°F). Precipitation is minimal, averaging just 2 mm (0.1 in) over 0 days, while the average humidity sits comfortably at 61%.

March Temperature in San Juan

In March in San Juan, the average temperature is 20°C (68°F). Maximums can reach 33°C (91°F) and minimums can be as low as 5°C (41°F). Be prepared for a range of temperatures and pack accordingly to enjoy your travels!

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 20°C (68°F), with highs reaching up to 33°C (91°F) and lows dropping to around 5°C (41°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 2 mm (0.1 in) during a span of 0 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 2 mm (0.1 inches) of precipitation spread over approximately 0 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 61%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace, making travel quite comfortable yet slightly sticky, as the air carries a gentle moisture that adds vibrancy to the surroundings.

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 61%, 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 reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, 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 11, 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	17°C (63°F)	11 mm (0.4 inches)	74%	high
February Weather	18°C (65°F)	37 mm (1.5 inches)	66%	very high
March Weather	20°C (68°F)	2 mm (0.1 inches)	61%	extreme
April Weather	22°C (72°F)	1 mm (0.0 inches)	56%	extreme
May Weather	24°C (76°F)	2 mm (0.1 inches)	61%	extreme
June Weather	26°C (78°F)	73 mm (2.9 inches)	73%	extreme
July Weather	24°C (76°F)	217 mm (8.6 inches)	82%	extreme
August Weather	25°C (76°F)	255 mm (10.0 inches)	83%	extreme
September Weather	24°C (75°F)	166 mm (6.5 inches)	83%	extreme
October Weather	23°C (74°F)	68 mm (2.7 inches)	78%	extreme
November Weather	21°C (69°F)	13 mm (0.5 inches)	77%	very high
December Weather	18°C (64°F)	24 mm (0.9 inches)	78%	high