December weather forecast
Ozatlán, El Salvador

December, the first month of the winter in Ozatlán, is still a tropical month, with an average temperature varying between 31.1°C (88°F) and 20.7°C (69.3°F).

Temperature

As December takes its course, Ozatlán's average high-temperature registers at a still tropical 31.1°C (88°F), closely aligning with the preceding month. Ozatlán, in December, experiences an average temperature of 20.7°C (69.3°F) at night.

Heat index

December's mean heat index is estimated at a very hot 38°C (100.4°F). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.
In the scope of the heat index, its values resonate with shade and light wind conditions. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', gives a temperature feeling by integrating air temperature and humidity. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

In Ozatlán, the average relative humidity in December is 69%.

Rainfall

In December, the rain falls for 4.8 days. Throughout December, 11mm (0.43") of precipitation is accumulated. Throughout the year, there are 206.2 rainfall days, and 1242mm (48.9") of precipitation is accumulated.

Daylight

December has the shortest days of the year in Ozatlán, with an average of 11h and 24min of daylight.
On the first day of December, sunrise is at 06:01 and sunset at 17:25. On the last day of the month, sunrise is at 06:16 and sunset at 17:37 CST.

Sunshine

The month with the least sunshine is December, with an average of 7.6h of sunshine.

UV index

The months with the highest UV index in Ozatlán are January through September and December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A daily maximum UV index of 7 in December translates into the following instructions:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays.