December weather forecast
Santiago, Panama

December, the first month of the winter in Santiago, 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

Welcoming December, Santiago notes an average high-temperature of a tropical 30.3°C (86.5°F), nearly consistent with November's 29.5°C (85.1°F). During December, Santiago records a consistent average nighttime temperature of 21.4°C (70.5°F).

Heat index

December's mean heat index is calculated to be a blistering 40°C (104°F). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', is a composite of temperature and humidity figures to convey how warm it feels. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

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

Rainfall

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

Daylight

December has the shortest days of the year in Santiago, with an average of 11h and 42min of daylight.
On the first day of the month, sunrise is at 06:22 and sunset at 18:03. On the last day of December, sunrise is at 06:37 and sunset at 18:17 EST.

Sunshine

In December, the average sunshine in Santiago, Panama, 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 in Santiago. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A maximum high UV index of 6 in December translates into the following recommendations:
Guard against overexposure. Protection from sun-induced harm is essential. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.