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May Weather in Usulutan, El Salvador

Last updated: August 23, 2025

In May, the average temperature in Usulutan, El Salvador is a warm 28°C (83°F). You can expect a minimum of 24°C (76°F) and a maximum that can reach up to 35°C (95°F). Be prepared for some rain, as 230 mm (9.1 in) of precipitation usually falls over 23 days. The average humidity sits at around 59%, making the air feel pleasantly tropical.

May Temperature in Usulutan

In May in Usulutan, the average temperature is 28°C (83°F). Maximums can reach 35°C (95°F), and minimums can be as low as 24°C (76°F). This makes it an ideal time for travelers seeking warm weather and plenty of sunshine.

May Weather in Usulutan: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Usulutan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Usulutan, May typically has an average temperature of 28°C (83°F), with highs reaching up to 35°C (95°F) and lows dropping to around 24°C (76°F).
JanFebMarAprMayJunJulAugSepOctNovDec818284848382838281818181
Data source: Temperature data for Usulutan 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 Usulutan

In Usulutan in May, the precipitation amount is 230 mm (9.1 in) over the course of 23 days.

May Precipitation Trends in Usulutan

The chart displays monthly precipitation patterns in Usulutan, 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 Usulutan, May typically receives around 230 mm (9.1 inches) of precipitation spread over approximately 23 days.
JanFebMarAprMayJunJulAugSepOctNovDec13725230353141275280409814
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Usulutan

In Usulutan 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 Usulutan

This chart illustrates the average monthly humidity levels in Usulutan, 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 Usulutan 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 Usulutan

In Usulutan 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 Usulutan, you can check here.

Maximum UV Index Levels in Usulutan for May

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

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

This table compares monthly weather conditions in Usulutan, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (82°F)1 mm (0.1 inches)63%extreme
February Weather28°C (83°F)3 mm (0.1 inches)62%extreme
March Weather29°C (84°F)7 mm (0.3 inches)59%extreme
April Weather29°C (84°F)25 mm (1.0 inches)59%extreme
May Weather28°C (83°F)230 mm (9.1 inches)59%extreme
June Weather28°C (82°F)353 mm (13.9 inches)68%extreme
July Weather29°C (84°F)141 mm (5.5 inches)77%extreme
August Weather28°C (82°F)275 mm (10.8 inches)79%extreme
September Weather27°C (81°F)280 mm (11.0 inches)77%extreme
October Weather27°C (81°F)409 mm (16.1 inches)77%extreme
November Weather27°C (81°F)80 mm (3.2 inches)75%very high
December Weather27°C (81°F)4 mm (0.2 inches)66%very high

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