December weather forecast
Uluazapa, El Salvador

The first month of the winter, December, is still a hot month in Uluazapa, El Salvador, with an average temperature fluctuating between 32°C (89.6°F) and 20.1°C (68.2°F).

Temperature

The advent of December brings an average high-temperature of a still tropical 32°C (89.6°F), almost identical to the preceding month. December's average low-temperature reading settles at a pleasant 20.1°C (68.2°F).

Heat index

December's average heat index is computed to be a very hot 39°C (102.2°F). Apply extra caution, heat cramps and heat exhaustion could happen. Heatstroke might occur with long-duration activity.
Bear in mind that the heat index values are determined for shaded areas and light breezes. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', shows a temperature sensation when both heat and moisture conditions are combined. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.

Humidity

In December, the average relative humidity is 65%.

Rainfall

In Uluazapa, during December, the rain falls for 4.1 days and regularly aggregates up to 5mm (0.2") of precipitation. Throughout the year, in Uluazapa, there are 188.2 rainfall days, and 954mm (37.56") of precipitation is accumulated.

Daylight

With an average of 11h and 18min of daylight, December has the shortest days of the year in Uluazapa.
On the first day of the month, sunrise is at 06:00 and sunset at 17:23. On the last day of December, sunrise is at 06:15 and sunset at 17:36 CST.

Sunshine

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

UV index

January through August, November and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: The UV index of 7 during December translates into the following guidance:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.