December weather forecast
Portobelillo, Panama

December, the first month of the winter in Portobelillo, is a tropical month, with an average temperature ranging between max 30.3°C (86.5°F) and min 21.4°C (70.5°F).

Temperature

December's arrival brings an average high-temperature of a tropical 30.3°C (86.5°F), demonstrating subtle variation from the preceding month. Portobelillo experiences an average temperature drop to a pleasant 21.4°C (70.5°F) during December nights.

Heat index

December's heat index is computed to be a blistering 40°C (104°F). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.
The metrics for the heat index are tailored for both shady environments and light winds. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is the outcome of merging air's temperature and its humidity metrics. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.

Humidity

In Portobelillo, the average relative humidity in December is 83%.

Rainfall

In Portobelillo, in December, during 20.6 rainfall days, 121mm (4.76") of precipitation is typically accumulated. In Portobelillo, during the entire year, the rain falls for 269.3 days and collects up to 2235mm (87.99") of precipitation.

Daylight

With an average of 11h and 42min of daylight, December has the shortest days of the year in Portobelillo.
On the first day of December, sunrise is at 06:20 and sunset at 18:02. On the last day of the month, sunrise is at 06:35 and sunset at 18:15 EST.

Sunshine

The average sunshine in December in Portobelillo is 8.8h.

UV index

July, August, October through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the average person.
Note: A maximum UV index of 6 in December translates into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.