December weather forecast
San Francisco Morazán, El Salvador

The first month of the winter, December, is still a hot month in San Francisco Morazán, El Salvador, with an average temperature varying between 30.8°C (87.4°F) and 18.6°C (65.5°F).

Temperature

The onset of December brings an average high-temperature of a still hot 30.8°C (87.4°F), nearly matching the November temperature. During December, San Francisco Morazán detects a significant contrast from its daytime temperatures, with nights averaging at an enjoyable 18.6°C (65.5°F).

Heat index

Throughout December, the heat index is appraised at a fiery hot 37°C (98.6°F). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.
Note that heat index values are valued for light wind and location in the shade. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'real feel' or 'feels like', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.

Humidity

In December, the average relative humidity in San Francisco Morazán is 69%.

Rainfall

In San Francisco Morazán, during December, the rain falls for 3.3 days and regularly aggregates up to 5mm (0.2") of precipitation. Throughout the year, there are 192.2 rainfall days, and 1062mm (41.81") of precipitation is accumulated.

Daylight

December has the shortest days of the year, with an average of 11h and 18min of daylight.
On the first day of the month, sunrise is at 06:05 and sunset at 17:25. On the last day of December, in San Francisco Morazán, sunrise is at 06:20 and sunset at 17:38 CST.

Sunshine

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

UV index

The months with the lowest UV index are January, June through December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the average person.
Note: In December, an average UV index of 6 transforms into the following instructions:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.