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March Weather in San Marcos, El Salvador

Last updated: August 23, 2025

In March, the average temperature in San Marcos, El Salvador is a warm 27°C (81°F), with minimums dropping to 17°C (64°F) and maximums soaring to 37°C (99°F). Expect a light precipitation of about 5 mm (0.2 in) over the course of just 1 day, while the average humidity rests comfortably at 59%. Enjoy the balmy weather!

March Temperature in San Marcos

In March in San Marcos, the average temperature is 27°C (81°F), with maximums reaching up to 37°C (99°F) and minimums falling as low as 17°C (64°F). This makes it an ideal time for travelers seeking warm weather and plenty of outdoor activities.

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 27°C (81°F), with highs reaching up to 37°C (99°F) and lows dropping to around 17°C (64°F).
JanFebMarAprMayJunJulAugSepOctNovDec777981818078808078787877
Data source: Temperature data for San Marcos 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 Marcos

In San Marcos in March, the precipitation amount is 5 mm (0.2 in) over a duration of 1 day.

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 5 mm (0.2 inches) of precipitation spread over approximately 1 days.
JanFebMarAprMayJunJulAugSepOctNovDec34559269292157252301272587
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in San Marcos

In San Marcos in March humidity is 59%. With an average temperature of 27°C (81°F), this humidity feels like a warm, tropical embrace, making it perfect for leisurely strolls but a bit sticky for extended outdoor activities.

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 59%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec63%62%59%59%59%68%78%79%77%77%75%67%
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 is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in San Marcos, you can check here.

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 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec11121414141413131313109
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.
 TemperaturePrecipitationHumidityUV
January Weather25°C (78°F)3 mm (0.1 inches)63%extreme
February Weather26°C (79°F)4 mm (0.2 inches)62%extreme
March Weather27°C (81°F)5 mm (0.2 inches)59%extreme
April Weather27°C (81°F)59 mm (2.3 inches)59%extreme
May Weather27°C (80°F)269 mm (10.6 inches)59%extreme
June Weather26°C (79°F)292 mm (11.5 inches)68%extreme
July Weather27°C (80°F)157 mm (6.2 inches)77%extreme
August Weather26°C (80°F)252 mm (9.9 inches)79%extreme
September Weather26°C (79°F)301 mm (11.9 inches)77%extreme
October Weather25°C (78°F)272 mm (10.7 inches)77%extreme
November Weather25°C (78°F)58 mm (2.3 inches)75%very high
December Weather25°C (78°F)7 mm (0.3 inches)66%very high

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