March Weather in San Marcos, Mexico

Last updated: August 27, 2025

In San Marcos, Mexico, the average temperature in March is a comfortable 20°C (68°F). During this time, temperatures can fluctuate, with minimums as low as 5°C (41°F) and maximums reaching up to 34°C (93°F). With only 3 mm (0.1 in) of precipitation spread across 0 days, you can expect a dry climate. The average humidity sits at a pleasant 46%, making it an ideal month to enjoy the outdoors.

March Temperature in San Marcos

In March in San Marcos, the average temperature is 20°C (68°F). Maximums can reach 34°C (93°F) and minimums can be as low as 5°C (41°F). Travelers should be prepared for warm days and cool nights, making layering essentials for this time of year.

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

The chart illustrates March temperature patterns in San Marcos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Marcos, March typically has an average temperature of 20°C (68°F), with highs reaching up to 34°C (93°F) and lows dropping to around 5°C (41°F).

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

March Precipitation in San Marcos

In San Marcos in March, the precipitation amount is 3 mm (0.1 in) during a total of 0 days.

March Precipitation Trends in San Marcos

The chart displays monthly precipitation patterns in San Marcos, 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 Marcos, March typically receives around 3 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 Marcos

In San Marcos in March, humidity is 46%. With an average temperature of 20°C (68°F), this humidity feels like a comfortable embrace, making it perfect for exploring the sights without feeling overly sticky or weighed down.

March Average Humidity in San Marcos

This chart illustrates the average monthly humidity levels in San Marcos, 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 Marcos is approximately 46%, 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 Marcos

In San Marcos 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 Marcos.

Maximum UV Index Levels in San Marcos for March

The chart shows the monthly maximum UV Index (UVI) for San Marcos 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 Marcos typically reaches 13, which falls under the extreme exposure category.

Data source: San Marcos 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 Marcos Compares to Other Months

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

This table compares monthly weather conditions in San Marcos, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	16°C (62°F)	13 mm (0.5 inches)	64%	very high
February Weather	17°C (64°F)	21 mm (0.8 inches)	57%	extreme
March Weather	20°C (68°F)	3 mm (0.1 inches)	46%	extreme
April Weather	21°C (70°F)	1 mm (0.0 inches)	42%	extreme
May Weather	23°C (73°F)	14 mm (0.5 inches)	51%	extreme
June Weather	23°C (73°F)	113 mm (4.4 inches)	74%	extreme
July Weather	21°C (70°F)	252 mm (9.9 inches)	79%	extreme
August Weather	21°C (71°F)	248 mm (9.8 inches)	81%	extreme
September Weather	21°C (70°F)	267 mm (10.5 inches)	84%	extreme
October Weather	21°C (70°F)	99 mm (3.9 inches)	75%	extreme
November Weather	19°C (66°F)	19 mm (0.7 inches)	71%	very high
December Weather	16°C (62°F)	15 mm (0.6 inches)	74%	very high