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 hot month in San Salvador, El Salvador, with average temperature ranging between max 30.9°C (87.6°F) and min 22.7°C (72.9°F).

Temperature

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

Heat index

In May, the average heat index is calculated to be a torrid 39.2°C (102.6°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'felt air temperature', 'real feel', or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (differences in body mass, height, and shape, pregnancy, wind). Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In San Salvador, El Salvador, the average relative humidity in May 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 San Salvador is 12.8h.

Sunshine

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

UV index

Months with the lowest UV index in San Salvador are January, May, June, August through December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV rays for the average person.
Note: In May, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in May in San Salvador?

In San Salvador, in May, the average high-temperature is 30.9°C (87.6°F), and the average low-temperature is 22.7°C (72.9°F). In May, the average heat index (a.k.a. 'feels like', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, is calculated to be 39.2°C (102.6°F).

What is the average humidity in May in San Salvador?

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

What is the wettest month in San Salvador?

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

What is the average length of the day in May in San Salvador?

In San Salvador, the average length of the day in May is 12.8h.

How long on average sun shines in May in San Salvador?

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

When is the lowest UV index in San Salvador?

Months with the lowest UV index in San Salvador are January, May, June, August through December, with an average maximum UV index of 6.

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

In May, the average daily maximum UV index in San Salvador, El Salvador, is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from the exposure to the Sun's 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).
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%

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: 12.8h

The month with the longest days is June (Average daylight: 12.9h).
The month with the shortest days is December (Average daylight: 11.3h).

  • Average sunshine in May: 10.8h

The month with the most sunshine is April (Average sunshine: 11.4h).
Months with the least sunshine are January and December (Average sunshine: 7.7).

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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

Months with the highest UV index are February, March, April and July (UV index 7).
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

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

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

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