December weather forecast
Cuyultitan, El Salvador

The first month of the winter, December, is also a hot month in Cuyultitan, El Salvador, with temperature in the range of an average low of 21.6°C (70.9°F) and an average high of 31.5°C (88.7°F).

Temperature

A negligible change is observed in Cuyultitan's average high-temperature at the start of December, equating it to November's temperature. Cuyultitan throughout December, experiences an average nighttime temperature of 21.6°C (70.9°F).

Heat index

During December, the heat index is calculated to be a very hot 38°C (100.4°F). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.
Heat index's context suggests values are appropriate for shady areas and slight breezes. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. Overheating dangers loom when the body's heat release mechanisms are overshadowed by excessive gain.

Humidity

The average relative humidity in December is 67%.

Rainfall

In Cuyultitan, in December, during 3.7 rainfall days, 5mm (0.2") of precipitation is typically accumulated. In Cuyultitan, during the entire year, the rain falls for 200.6 days and collects up to 971mm (38.23") of precipitation.

Daylight

December has the shortest days of the year, with an average of 11h and 18min of daylight.
On the first day of December, sunrise is at 06:04 and sunset at 17:27. On the last day of the month, sunrise is at 06:19 and sunset at 17:40 CST.

Sunshine

December has the least sunshine of the year, with an average of 7.6h of sunshine.

UV index

January through August, October through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In December, the average maximum UV index of 7 translates into the following recommendations:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. 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. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.