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May Weather in San Martin, El Salvador

Last updated: August 23, 2025

In May, the average temperature in San Martin, El Salvador reaches a warm 27°C (81°F), with minimums dipping to 20°C (69°F) and maximums soaring to 36°C (97°F). Expect a fair amount of precipitation at 279 mm (11.0 in) over 26 days, and enjoy the tropical feel with an average humidity of 59%.

May Temperature in San Martin

In May in San Martin, the average temperature is 27°C (81°F), with maximums reaching 36°C (97°F) and minimums dropping as low as 20°C (69°F). This warm climate makes it an ideal destination for travelers seeking sunny weather and outdoor adventures.

May Weather in San Martin: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in San Martin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Martin, May typically has an average temperature of 27°C (81°F), with highs reaching up to 36°C (97°F) and lows dropping to around 20°C (69°F).
JanFebMarAprMayJunJulAugSepOctNovDec788081828079818079787878
Data source: Temperature data for San Martin 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.

May Precipitation in San Martin

In San Martin in May, the precipitation amount is 279 mm (11.0 in) spread over 26 days, indicating a significant amount of rainfall during that period.

May Precipitation Trends in San Martin

The chart displays monthly precipitation patterns in San Martin, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In San Martin, May typically receives around 279 mm (11.0 inches) of precipitation spread over approximately 26 days.
JanFebMarAprMayJunJulAugSepOctNovDec35551280313138232291286657
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in San Martin

In San Martin in May 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.

May Average Humidity in San Martin

This chart illustrates the average monthly humidity levels in San Martin, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in San Martin 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 May generated using information from the Copernicus Climate Change Service.

May UV Index in San Martin

In San Martin in May, 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 Martin, you can check here.

Maximum UV Index Levels in San Martin for May

The chart shows the monthly maximum UV Index (UVI) for San Martin in May, 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 May, the maximum UV index in San Martin typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec11121414141413131313109
Data source: San Martin May 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 May Weather in San Martin Compares to Other Months

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

This table compares monthly weather conditions in San Martin, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (78°F)3 mm (0.1 inches)63%extreme
February Weather26°C (80°F)5 mm (0.2 inches)62%extreme
March Weather27°C (82°F)5 mm (0.2 inches)59%extreme
April Weather28°C (82°F)51 mm (2.0 inches)59%extreme
May Weather27°C (81°F)279 mm (11.0 inches)59%extreme
June Weather26°C (79°F)313 mm (12.3 inches)68%extreme
July Weather27°C (81°F)138 mm (5.4 inches)77%extreme
August Weather27°C (80°F)232 mm (9.1 inches)79%extreme
September Weather26°C (79°F)291 mm (11.5 inches)77%extreme
October Weather25°C (78°F)286 mm (11.3 inches)77%extreme
November Weather26°C (78°F)65 mm (2.5 inches)75%very high
December Weather25°C (78°F)7 mm (0.3 inches)66%very high

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