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March Weather in Santiago, Costa Rica

Last updated: August 23, 2025

In Santiago, Costa Rica, the average temperature in March is a comfortable 22°C (72°F). You'll experience a pleasant range, with minimums dipping to 16°C (61°F) and maximums reaching up to 28°C (83°F). However, be prepared for occasional rain, as 74 mm (2.9 in) of precipitation can be expected over 17 days. With the average humidity hovering around 66%, it's the perfect time to enjoy the warm and slightly humid weather!

March Temperature in Santiago

In March in Santiago, the average temperature is 22°C (72°F). It can peak at 28°C (83°F) and dip to as low as 16°C (61°F). This pleasant climate makes it an ideal time for outdoor adventures and sightseeing.

March Weather in Santiago: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Santiago, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santiago, March typically has an average temperature of 22°C (72°F), with highs reaching up to 28°C (83°F) and lows dropping to around 16°C (61°F).
JanFebMarAprMayJunJulAugSepOctNovDec707172727272717171707070
Data source: Temperature data for Santiago 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 Santiago

In Santiago in March, the precipitation amount is 74 mm (2.9 in) distributed over 17 days.

March Precipitation Trends in Santiago

The chart displays monthly precipitation patterns in Santiago, 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 Santiago, March typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec1166574253706651683762853873503253
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in Santiago

In Santiago in March, humidity is 66%. With an average temperature of 22°C (72°F), this humidity feels like walking through a warm, enveloping blanket, making it essential to stay hydrated while exploring the sights and taking regular breaks in shaded areas.

March Average Humidity in Santiago

This chart illustrates the average monthly humidity levels in Santiago, 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 Santiago is approximately 66%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec68%68%66%67%69%84%85%82%81%80%80%73%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Santiago

In Santiago 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 Santiago, you can check here.

Maximum UV Index Levels in Santiago for March

The chart shows the monthly maximum UV Index (UVI) for Santiago 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 Santiago typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec111314141514141313131110
Data source: Santiago 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 Santiago Compares to Other Months

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

This table compares monthly weather conditions in Santiago, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather21°C (71°F)116 mm (4.6 inches)68%extreme
February Weather22°C (71°F)65 mm (2.5 inches)68%extreme
March Weather22°C (72°F)74 mm (2.9 inches)66%extreme
April Weather22°C (72°F)253 mm (10.0 inches)67%extreme
May Weather22°C (72°F)706 mm (27.8 inches)69%extreme
June Weather22°C (72°F)651 mm (25.6 inches)84%extreme
July Weather22°C (72°F)682 mm (26.9 inches)85%extreme
August Weather22°C (71°F)762 mm (30.0 inches)82%extreme
September Weather21°C (71°F)853 mm (33.6 inches)81%extreme
October Weather21°C (70°F)873 mm (34.4 inches)80%extreme
November Weather21°C (71°F)503 mm (19.8 inches)80%extreme
December Weather21°C (71°F)253 mm (10.0 inches)72%very high

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