December weather forecast
Tronadora, Costa Rica

As the year concludes in Tronadora, the weather comes full circle. December sees a return to the dry and sunny days that were common at the start of the year, with the lowest rainfall levels of just 19mm (0.75"). The drastic change from November's showers to minimum rain makes December the driest month. The skies become clearer, offering perfect conditions for enjoying the city's natural scenery. The relief from the rain refreshes the city, making it a great time to partake in end-of-year festivities and recreational activities.

Temperature

Shifting into December, Tronadora records an average high-temperature of a still warm 29.7°C (85.5°F), presenting minor fluctuations compared to the previous month. Tronadora anticipates an average minimum temperature of 22.1°C (71.8°F) in the month of December.

Heat index

December's heat index is appraised at a torrid 35°C (95°F). Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.
Realize that the values for the heat index are set for shaded places and light winds. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

In December, the average relative humidity in Tronadora is 75%.

Rainfall

In Tronadora, in December, during 10.8 rainfall days, 19mm (0.75") of precipitation is typically accumulated. In Tronadora, during the entire year, the rain falls for 218.6 days and collects up to 1456mm (57.32") of precipitation.

Daylight

With an average of 11h and 30min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 05:42 and sunset at 17:15. On the last day of December, in Tronadora, Costa Rica, sunrise is at 05:57 and sunset at 17:28 CST.

Sunshine

In Tronadora, Costa Rica, the average sunshine in December is 9.6h.

UV index

The months with the highest UV index in Tronadora 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 health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 7 in December translates into this advice:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.