December weather forecast and climate
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
December, the first month of the winter, in San Salvador, is also a moderately hot month, with average temperature ranging between max 29.9°C (85.8°F) and min 19.5°C (67.1°F).

Temperature

In December, the average high-temperature remains equal as in November - a still moderately hot 29.9°C (85.8°F). In December, in San Salvador, El Salvador, the average low-temperature is 19.5°C (67.1°F).

Heat index

In December, the average heat index is appraised at a tropical 34.8°C (94.6°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
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 'felt air temperature', 'real feel', 'feels like', or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional factors like activity, metabolic differences, pregnancy, and differences in body mass, height, and shape affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. 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.

Humidity

In San Salvador, the average relative humidity is 70%.

Rainfall

In December, in San Salvador, the rain falls for 2.3 days. Throughout December, 4mm (0.16") of precipitation is accumulated. In San Salvador, during the entire year, the rain falls for 187 days and collects up to 1106mm (43.54") of precipitation.

Daylight

December has the shortest days of the year, with an average of 11.3h of daylight.

Sunshine

Months with the least sunshine in San Salvador are January and December, with an average of 7.7h of sunshine.

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 of 6 to 7 symbolizes a high threat to health from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: In December, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. 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.

What is the temperature in December in San Salvador?

In December, in San Salvador, the average high-temperature is 29.9°C (85.8°F), and the average low-temperature is 19.5°C (67.1°F). In December, the average heat index (a.k.a. 'feels like', 'real feel'), that combines both air temperature and relative humidity, is estimated at 34.8°C (94.6°F).

What is the average humidity in December in San Salvador?

The average relative humidity in December in San Salvador is 70%.

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

In December, in San Salvador, the rain falls for 2.3 days. Throughout December, 4mm (0.16") of precipitation is accumulated.

What is the month with the shortest days in San Salvador?

December has the shortest days of the year, with an average of 11.3h of daylight.

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

The average length of the day in December in San Salvador, El Salvador, is 11.3h.

What is the month with the least sunshine in San Salvador?

Months with the least sunshine in San Salvador are January and December, with an average of 7.7h of sunshine.

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

In San Salvador, El Salvador, the average sunshine in December is 7.7h.

What is the month with the lowest UV index in San Salvador?

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

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

In December, the average daily maximum UV index in San Salvador, El Salvador, is 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to the UV radiation.
Average temperature in December - San Salvador, El Salvador
  • Average high temperature in December: 29.9°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 December: 19.5°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).

Average pressure in December - San Salvador, El Salvador
  • Average pressure in December: 1013mbar

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

Average wind speed in December - San Salvador, El Salvador
  • Average wind speed in December: 7.9km/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).

Average humidity in December - San Salvador, El Salvador
  • Average humidity in December: 70%

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

Average rainfall in December - San Salvador, El Salvador
  • Average rainfall in December: 4mm

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

Average rainfall days in December - San Salvador, El Salvador
  • Average rainfall days in December: 2.3 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).

Average daylight in December / Average sunshine in December - San Salvador, El Salvador
  • Average daylight in December: 11.3h

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 December: 7.7h

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).

Average sunshine days in December - San Salvador, El Salvador
  • Average sunshine days in December: 28.5 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).

Average UV index in December - San Salvador, El Salvador
  • Average UV index in December: 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).

Average visibility in December - San Salvador, El Salvador
  • Average visibility in December: 10km

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