May weather forecast
San Salvador, El Salvador

The sunlit San Salvador city in El Salvador set on the beautiful slopes of the mountain
The sunlit San Salvador city in El Salvador set on the beautiful slopes of the mountain

Weather in May

The last month of the spring, May, is another tropical month in San Salvador, El Salvador, with an average temperature ranging between min 22.7°C (72.9°F) and max 30.9°C (87.6°F).

Temperature

In San Salvador, the average high-temperature in May is relatively the same as in April - a still tropical 30.9°C (87.6°F). The average low-temperature, in San Salvador, is 22.7°C (72.9°F).

Heat index

The average heat index in May is evaluated at a very hot 39.2°C (102.6°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'apparent temperature', 'real feel', or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like pregnancy, wind, metabolic differences, and activity influence one's weather impression. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In May, the average relative humidity is 76%.

Rainfall

The month with the most rainfall is May, when the rain falls for 25.5 days and typically aggregates up to 234mm (9.21") of precipitation.

Daylight

The average length of the day in May in San Salvador is 12h and 46min.
On the first day of the month, sunrise is at 05:35 and sunset at 18:12. On the last day of May, in San Salvador, El Salvador, sunrise is at 05:28 and sunset at 18:20 CST.

Sunshine

In San Salvador, the average sunshine in May is 10.8h.

UV index

January, May, June, August through December, with an average maximum UV index of 6, are months with the lowest UV index in San Salvador, El Salvador. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The daily maximum UV index of 6 in May interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in May in San Salvador?

The average high-temperature, in May, in San Salvador, is 30.9°C (87.6°F), while the average low-temperature is 22.7°C (72.9°F). In May, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which represents the influence of relative humidity on air temperature, is evaluated at 39.2°C (102.6°F).

What is the average humidity in May in San Salvador?

In San Salvador, El Salvador, the average relative humidity in May is 76%.

What is the rainiest month in San Salvador?

The month with the most rainfall in San Salvador is May, when the rain falls for 25.5 days and typically aggregates up to 234mm (9.21") of precipitation.

How many days does it rain in May in San Salvador?

In San Salvador, in May, during 25.5 rainfall days, 234mm (9.21") of precipitation is typically accumulated.

How many hours of daylight does San Salvador have in May?

The average day length in May in San Salvador, El Salvador, is 12h and 46min.

When are sunrise and sunset in May in San Salvador?

In May, on the first day of the month, sunrise is at 05:35 and sunset at 18:12. On the last day of the month, in San Salvador, sunrise is at 05:28 and sunset at 18:20 CST.

How many hours of sunshine does San Salvador have in May?

In San Salvador, El Salvador, the average sunshine duration in May is 10.8h.

When is the lowest UV index in San Salvador?

January, May, June, August through December, with an average maximum UV index of 6, are months with the lowest UV index.

What is the UV index intensity in May in San Salvador?

In San Salvador, the average daily maximum UV index in May is 6. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to UV radiation.

Average temperature in May
San Salvador, El Salvador

Average temperature in May - San Salvador, El Salvador
  • Average high temperature in May: 30.9°C

The warmest month (with the highest average high temperature) is March (32.6°C).
The month with the lowest average high temperature is October (29°C).

  • Average low temperature in May: 22.7°C

The month with the highest average low temperature is April (22.8°C).
The coldest month (with the lowest average low temperature) is January (19.4°C).

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Average pressure in May
San Salvador, El Salvador

Average pressure in May - San Salvador, El Salvador
  • Average pressure in May: 1011.3mbar

The month with the highest atmospheric pressure is January (1013.5mbar).
The months with the lowest atmospheric pressure are May and October (1011.3mbar).

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Average wind speed in May
San Salvador, El Salvador

Average wind speed in May - San Salvador, El Salvador
  • Average wind speed in May: 5.1km/h

The windiest month (with the highest average wind speed) is January (8.5km/h).
The calmest month (with the lowest average wind speed) is June (4.8km/h).

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Average humidity in May
San Salvador, El Salvador

Average humidity in May - San Salvador, El Salvador
  • Average humidity in May: 76%

The months with the highest relative humidity are September and October (82%).
The month with the lowest relative humidity is March (62%).

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Average rainfall in May
San Salvador, El Salvador

Average rainfall in May - San Salvador, El Salvador
  • Average rainfall in May: 234mm

The wettest month (with the highest rainfall) is May (234mm).
The driest month (with the least rainfall) is January (1mm).

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Average rainfall days in May
San Salvador, El Salvador

Average rainfall days in May - San Salvador, El Salvador
  • Average rainfall days in May: 25.5 days

The month with the highest number of rainy days is September (26.3 days).
The month with the least rainy days is January (1.9 days).

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Average daylight in May /
Average sunshine in May
San Salvador, El Salvador

Average daylight in May / Average sunshine in May - San Salvador, El Salvador
  • Average daylight in May: 12h and 46min

The month with the longest days is June (Average daylight: 12h and 55min).
The month with the shortest days is December (Average daylight: 11h and 20min).

  • Average sunshine in May: 10h and 48min

The month with the most sunshine is April (Average sunshine: 11h and 24min).
The months with the least sunshine are January and December (Average sunshine: 7h and 42min).

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Average sunshine days in May
San Salvador, El Salvador

Average sunshine days in May - San Salvador, El Salvador
  • Average sunshine days in May: 4.5 days

The month with the most sunshine days is January (28.7 days).
The month with the least sunshine days is September (3.2 days).

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Average UV index in May
San Salvador, El Salvador

Average UV index in May - San Salvador, El Salvador
  • Average UV index in May: 6

The months with the highest UV index are February, March, April and July (UV index 7).
The months with the lowest UV index are January, May, June, August, September, October, November and December (UV index 6).

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Average cloud cover in May
San Salvador, El Salvador

Average cloud cover in May - San Salvador, El Salvador
  • Average cloud cover in May: 36

The months with the most cloud cover are June, September and October (Cloud cover 38).
The month with the least cloud cover is January (Cloud cover 13).

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Average visibility in May
San Salvador, El Salvador

Average visibility in May - San Salvador, El Salvador
  • Average visibility in May: 9km

The months with the highest visibility are January, February, March, April, November and December (10km).
The months with the lowest visibility are September and October (8km).

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