December weather forecast
San José Villanueva, El Salvador

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Weather in December

As the final month of the year, December brings cooler temperatures, reduced rainfall, and higher wind speeds to San José Villanueva. With rains tapering off to a mere 4mm (0.16"), it emerges as the driest month of the year. A perceptible drop in humidity to 70% ushers in comfortable conditions. Despite the shorter days, the city enjoys regular sunshine, adding warmth to the chilly environment. Even with the lower temperatures, the ongoing UV index of 6 indicates sun protection remains a necessity in outdoor activities.

Temperature

San José Villanueva's average high-temperature undergoes a slight change with the dawn of December, equating to the readings of November. Throughout December, San José Villanueva registers a consistent average low-temperature of 19.5°C (67.1°F).

Heat index

For most parts of December, the heat index is estimated at a fiery hot 35°C (95°F). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is a metric representing the sensation of warmth when air temperature and moisture come together. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. Rising body temperatures due to excess heat retention could signify impending heat disorders.

Humidity

In San José Villanueva, the average relative humidity in December is 70%.

Rainfall

In San José Villanueva, in December, it is raining for 2.3 days, with typically 4mm (0.16") of accumulated precipitation. Throughout the year, in San José Villanueva, El Salvador, there are 187 rainfall days, and 1106mm (43.54") of precipitation is accumulated.

Daylight

With an average of 11h and 18min of daylight, December has the shortest days of the year in San José Villanueva.
On the first day of the month, sunrise is at 06:04 and sunset at 17:27. On the last day of December, sunrise is at 06:20 and sunset at 17:40 CST.

Sunshine

The months with the least sunshine are January and December, with an average of 7.7h of sunshine.

UV index

The months with the lowest UV index in San José Villanueva, El 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 hazard from exposure to the Sun's UV radiation for average individuals.
Note: In December, the UV index of 6 transforms into the following advice:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.

Frequently asked questions

How hot is December in San José Villanueva?

The high-temperature in San José Villanueva, El Salvador, during December is 29.9°C (85.8°F) and the low-temperature is 19.5°C (67.1°F). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which represents the influence of relative humidity on air temperature, in December is estimated at 35°C (95°F).

What is the average humidity in December in San José Villanueva?

In December, the average relative humidity in San José Villanueva, El Salvador, is 70%.

How much does it rain in San José Villanueva in December?

In San José Villanueva, in December, it is raining for 2.3 days, with typically 4mm (0.16") of accumulated precipitation.

What is the month with the shortest days in San José Villanueva?

With an average of 11h and 18min of daylight, December has the shortest days of the year.

How many hours of daylight does San José Villanueva have in December?

In December, the average day length is 11h and 20min.

When are sunrise and sunset in December in San José Villanueva?

On the first day of December in San José Villanueva, sunrise is at 06:04 and sunset at 17:27. On the last day of the month, sunrise is at 06:20 and sunset at 17:40 CST.

What are the months with the least sunshine in San José Villanueva?

January and December, with an average of 7.7h of sunshine, are months with the least sunshine in San José Villanueva.

How many hours of sunshine does San José Villanueva have in December?

In December, the average sunshine duration is 7.7h.

What is the month with the lowest UV index in San José Villanueva?

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 December in San José Villanueva?

In December, the average daily maximum UV index in San José Villanueva, El Salvador, is 6. A UV Index value of 6 to 7 symbolizes a high health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in December
San José Villanueva, El Salvador

Average temperature in December - San José Villanueva, 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 José Villanueva, El Salvador

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

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

Average wind speed in December
San José Villanueva, El Salvador

Average wind speed in December - San José Villanueva, 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 José Villanueva, El Salvador

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

The 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 José Villanueva, El Salvador

Average rainfall in December - San José Villanueva, 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 José Villanueva, El Salvador

Average rainfall days in December - San José Villanueva, 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 José Villanueva, El Salvador

Average daylight in December / Average sunshine in December - San José Villanueva, El Salvador
  • Average daylight in December: 11h and 2min

The month with the longest days is June (Average daylight: 12h and 54min).
The month with the shortest days is December (Average daylight: 11h and 18min).

  • Average sunshine in December: 7h and 4min

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).

Average sunshine days in December
San José Villanueva, El Salvador

Average sunshine days in December - San José Villanueva, 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 José Villanueva, El Salvador

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

Average cloud cover in December
San José Villanueva, El Salvador

Average cloud cover in December - San José Villanueva, El Salvador
  • Average cloud cover in December: 14

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).

Average visibility in December
San José Villanueva, El Salvador

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

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).

San José Villanueva, El Salvador

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