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March Weather in San Isidro, Puerto Rico

Last updated: August 31, 2025

In March, the average temperature in San Isidro, Puerto Rico is a pleasant 25°C (77°F). Expect a minimum of 21°C (71°F) and a maximum of 30°C (86°F), creating a comfortable climate for outdoor activities. However, prepare for some rain, as 67 mm (2.6 in) of precipitation is expected over 14 days. With an average humidity level of 74%, it's an ideal time to experience the vibrant atmosphere of San Isidro!

March Temperature in San Isidro

In March in San Isidro, the average temperature is 25°C (77°F). Maximum can reach 30°C (86°F) and minimum can be as low as 21°C (71°F). This makes it an ideal time for travelers seeking warm weather and outdoor activities.

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

The chart illustrates March temperature patterns in San Isidro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Isidro, March typically has an average temperature of 25°C (77°F), with highs reaching up to 30°C (86°F) and lows dropping to around 21°C (71°F).
JanFebMarAprMayJunJulAugSepOctNovDec777677788081828282817978
Data source: Temperature data for San Isidro 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 Isidro

In San Isidro in March, the precipitation amount is 67 mm (2.6 in) spread over 14 days.

March Precipitation Trends in San Isidro

The chart displays monthly precipitation patterns in San Isidro, 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 Isidro, March typically receives around 67 mm (2.6 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec394367566468879917314510651
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in San Isidro

In San Isidro in March humidity is 74%. With an average temperature of 25°C (77°F), this humidity feels like a warm, muggy blanket wrapping around you, making travel a bit more challenging as you find yourself sticky and in need of frequent breaks to hydrate and cool down.

March Average Humidity in San Isidro

This chart illustrates the average monthly humidity levels in San Isidro, 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 Isidro is approximately 74%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%75%74%75%75%77%80%80%79%78%78%76%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in San Isidro

In San Isidro 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 Isidro.

Maximum UV Index Levels in San Isidro for March

The chart shows the monthly maximum UV Index (UVI) for San Isidro 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 Isidro typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911131314131213131298
Data source: San Isidro 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 Isidro Compares to Other Months

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

This table compares monthly weather conditions in San Isidro, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (77°F)38 mm (1.5 inches)76%very high
February Weather25°C (77°F)43 mm (1.7 inches)75%extreme
March Weather25°C (77°F)67 mm (2.6 inches)74%extreme
April Weather26°C (78°F)56 mm (2.2 inches)75%extreme
May Weather27°C (80°F)64 mm (2.5 inches)75%extreme
June Weather27°C (81°F)68 mm (2.7 inches)77%extreme
July Weather28°C (82°F)87 mm (3.4 inches)80%extreme
August Weather28°C (82°F)99 mm (3.9 inches)80%extreme
September Weather28°C (82°F)173 mm (6.8 inches)79%extreme
October Weather27°C (81°F)145 mm (5.7 inches)78%extreme
November Weather26°C (80°F)106 mm (4.2 inches)78%very high
December Weather26°C (78°F)51 mm (2.0 inches)76%very high

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