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May Weather in San Salvador, Peru

Last updated: August 27, 2025

In San Salvador, Peru, the average temperature in May hovers around 8°C (46°F). Expect a minimum chill of -3°C (28°F) at night, while daytime highs can reach up to 17°C (62°F). With 73 mm (2.9 in) of precipitation spread over 19 days, be prepared for frequent showers. The air is fairly humid, averaging around 88%, creating a cozy yet damp atmosphere.

May Temperature in San Salvador

In May in San Salvador, the average temperature is 8°C (46°F). The maximum can reach 17°C (62°F), while the minimum can be as low as -3°C (28°F). Be prepared for a mix of chilly and mild weather, making it essential to pack layers for your travels.

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

The chart illustrates May temperature patterns in San Salvador, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Salvador, May typically has an average temperature of 8°C (46°F), with highs reaching up to 17°C (62°F) and lows dropping to around -3°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec484848474645444546484949
Data source: Temperature data for San Salvador 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 Salvador

In San Salvador in May, the total precipitation amount is 73 mm (2.9 in) spread over 19 days.

May Precipitation Trends in San Salvador

The chart displays monthly precipitation patterns in San Salvador, 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 Salvador, May typically receives around 73 mm (2.9 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec1902662031307363506590127156254
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in San Salvador

In San Salvador in May, humidity is 88%. With an average temperature of 8°C (46°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration feel much more uncomfortable than the temperature alone would suggest.

May Average Humidity in San Salvador

This chart illustrates the average monthly humidity levels in San Salvador, 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 Salvador is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec94%92%92%90%88%77%55%44%51%64%84%93%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in San Salvador

In San Salvador 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 Salvador, you can check here.

Maximum UV Index Levels in San Salvador for May

The chart shows the monthly maximum UV Index (UVI) for San Salvador 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 Salvador typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec221919171411131417182220
Data source: San Salvador 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 Salvador Compares to Other Months

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

This table compares monthly weather conditions in San Salvador, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (48°F)189 mm (7.5 inches)94%extreme
February Weather9°C (48°F)266 mm (10.5 inches)92%extreme
March Weather9°C (48°F)203 mm (8.0 inches)92%extreme
April Weather8°C (47°F)129 mm (5.1 inches)90%extreme
May Weather8°C (46°F)73 mm (2.9 inches)88%extreme
June Weather7°C (45°F)63 mm (2.5 inches)77%extreme
July Weather7°C (44°F)50 mm (2.0 inches)55%extreme
August Weather7°C (45°F)65 mm (2.6 inches)44%extreme
September Weather8°C (46°F)90 mm (3.5 inches)51%extreme
October Weather9°C (48°F)127 mm (5.0 inches)64%extreme
November Weather10°C (49°F)156 mm (6.1 inches)84%extreme
December Weather9°C (49°F)254 mm (10.0 inches)93%extreme

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