December weather forecast
Liberia, Costa Rica

December in Liberia marks the end of the rainy season and the onset of promising dry months. Weather at this time is characterized by significantly reduced rainfall, a mere 9mm (0.35") compared to November's 79mm (3.11"). The number of rainy days correspondingly decline, bringing an end to consistent rain showers. This change results in enhanced visibility of up to 10km (6.2mi), similar to the early months of the year. As temperatures continue to be warm, winds escalate to their annual peak speed of 17.4km/h (10.8mph).

Temperature

Entering December, Liberia's average high-temperature reads a still moderately hot 29.5°C (85.1°F), indicating a close resemblance to the previous month's climate. During December, Liberia sees a mean low-temperature of 22.2°C (72°F).

Heat index

For December, the heat index is estimated at a very hot 36°C (96.8°F). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
Observations indicate that the heat index values are for shady locations with light wind. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', measures the perceived warmth when incorporating the humidity present in the air. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. In conditions of both high temperature and humidity (a high heat index), sweating is limited and the perception of heat is enhanced. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.

Humidity

The average relative humidity in December in Liberia is 78%.

Rainfall

In Liberia, in December, during 5.7 rainfall days, 9mm (0.35") of precipitation is typically accumulated. In Liberia, during the entire year, the rain falls for 188.5 days and collects up to 1202mm (47.32") of precipitation.

Daylight

December has the shortest days of the year, with an average of 11h and 30min of daylight.
On the first day of December in Liberia, sunrise is at 05:44 and sunset at 17:17. On the last day of the month, sunrise is at 05:59 and sunset at 17:30 CST.

Sunshine

The average sunshine in December is 9.6h.

UV index

The months with the highest UV index are January through October and December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: In December, the maximum UV index of 7 suggests this advice:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. 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. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.