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May Weather in La Union, El Salvador

Last updated: August 23, 2025

In May, the average temperature in La Union, El Salvador reaches a warm 28°C (83°F). Expect minimum temperatures around 25°C (77°F) and highs peaking at 32°C (90°F). With 275 mm (10.8 in) of precipitation spread over 23 days, this month's charm is accompanied by an average humidity of 59%.

May Temperature in La Union

In May in La Union, the average temperature is 28°C (83°F). Maximum temperatures can reach 32°C (90°F), while minimums may drop to 25°C (77°F). This warm climate makes La Union an ideal destination for travelers seeking sun and pleasant weather during this time.

May Weather in La Union: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in La Union, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In La Union, May typically has an average temperature of 28°C (83°F), with highs reaching up to 32°C (90°F) and lows dropping to around 25°C (77°F).
JanFebMarAprMayJunJulAugSepOctNovDec828283838282848382818282
Data source: Temperature data for La Union 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 La Union

In La Union in May, the total precipitation amount is 275 mm (10.8 in) distributed over a period of 23 days.

May Precipitation Trends in La Union

The chart displays monthly precipitation patterns in La Union, 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 La Union, May typically receives around 275 mm (10.8 inches) of precipitation spread over approximately 23 days.
JanFebMarAprMayJunJulAugSepOctNovDec2343727633576259314431593
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in La Union

In La Union in May humidity is 59%. With an average temperature of 28°C (83°F), this humidity feels like a warm embrace, making traveling a little sticky but overall comfortable as long as you stay hydrated and take breaks in the shade.

May Average Humidity in La Union

This chart illustrates the average monthly humidity levels in La Union, 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 La Union 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 La Union

In La Union 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 La Union, you can check here.

Maximum UV Index Levels in La Union for May

The chart shows the monthly maximum UV Index (UVI) for La Union 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 La Union typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec10121414141413131313109
Data source: La Union 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 La Union Compares to Other Months

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

This table compares monthly weather conditions in La Union, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather28°C (82°F)2 mm (0.1 inches)63%very high
February Weather28°C (82°F)3 mm (0.1 inches)62%extreme
March Weather28°C (83°F)4 mm (0.2 inches)59%extreme
April Weather28°C (83°F)37 mm (1.5 inches)59%extreme
May Weather28°C (83°F)275 mm (10.8 inches)59%extreme
June Weather28°C (83°F)335 mm (13.2 inches)68%extreme
July Weather29°C (85°F)76 mm (3.0 inches)77%extreme
August Weather28°C (83°F)259 mm (10.2 inches)79%extreme
September Weather28°C (82°F)314 mm (12.3 inches)77%extreme
October Weather27°C (81°F)431 mm (17.0 inches)77%extreme
November Weather28°C (83°F)59 mm (2.3 inches)75%very high
December Weather28°C (82°F)3 mm (0.1 inches)66%very high

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