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May Weather in San Alejo, El Salvador

Last updated: August 23, 2025

In May, the average temperature in San Alejo, El Salvador hovers around 29°C (84°F), with a minimum of 22°C (72°F) and a maximum reaching up to 39°C (102°F). Expect significant precipitation, averaging 241 mm (9.5 in) over 24 days, contributing to an average humidity of 59%. Prepare for a warm, humid month!

May Temperature in San Alejo

In May in San Alejo, the average temperature is 29°C (84°F), with maximums reaching up to 39°C (102°F) and minimums dropping as low as 22°C (72°F). This warm climate makes it an ideal destination for travelers seeking sunshine and outdoor activities.

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

The chart illustrates May temperature patterns in San Alejo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Alejo, May typically has an average temperature of 29°C (84°F), with highs reaching up to 39°C (102°F) and lows dropping to around 22°C (72°F).
JanFebMarAprMayJunJulAugSepOctNovDec828486868482848381808081
Data source: Temperature data for San Alejo 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 Alejo

In San Alejo in May, the precipitation amount is 241 mm (9.5 in) over a span of 24 days.

May Precipitation Trends in San Alejo

The chart displays monthly precipitation patterns in San Alejo, 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 Alejo, May typically receives around 241 mm (9.5 inches) of precipitation spread over approximately 24 days.
JanFebMarAprMayJunJulAugSepOctNovDec1162924127480222248331553
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in San Alejo

In San Alejo in May, humidity is 59%. With an average temperature of 29°C (84°F), this humidity feels like a warm embrace, making outdoor activities enjoyable yet requiring regular hydration and occasional breaks in shaded areas for comfort while exploring.

May Average Humidity in San Alejo

This chart illustrates the average monthly humidity levels in San Alejo, 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 Alejo 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 Alejo

In San Alejo 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 Alejo, you can check here.

Maximum UV Index Levels in San Alejo for May

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

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

This table compares monthly weather conditions in San Alejo, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather28°C (82°F)1 mm (0.0 inches)63%extreme
February Weather29°C (84°F)1 mm (0.0 inches)62%extreme
March Weather30°C (86°F)6 mm (0.2 inches)59%extreme
April Weather30°C (86°F)29 mm (1.1 inches)59%extreme
May Weather29°C (84°F)241 mm (9.5 inches)59%extreme
June Weather28°C (82°F)274 mm (10.8 inches)68%extreme
July Weather29°C (84°F)80 mm (3.1 inches)77%extreme
August Weather28°C (83°F)222 mm (8.7 inches)79%extreme
September Weather27°C (82°F)248 mm (9.8 inches)77%extreme
October Weather27°C (80°F)331 mm (13.0 inches)77%extreme
November Weather27°C (80°F)55 mm (2.2 inches)75%very high
December Weather27°C (81°F)3 mm (0.1 inches)66%very high

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