December weather forecast
Calai, Angola

The first month of the summer, December, is also a hot month in Calai, Angola, with an average temperature fluctuating between 31.2°C (88.2°F) and 21.2°C (70.2°F).

Temperature

December's arrival registers an average high-temperature of a still hot 31.2°C (88.2°F), closely aligning with the temperature of the previous month. In December, Calai experiences an average nighttime temperature of 21.2°C (70.2°F).

Heat index

For December, the heat index is evaluated at a fiery hot 35°C (95°F). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.
Given the heat index, its values are aligned with shaded sites and gentle winds. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', arises from combining readings of air temperature and relative moisture content. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. 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 especially vital to children. Juveniles are regularly less conscious of the need to recuperate and rehydrate. Thirst is a tardy symptom of dehydration - hydration, especially during lengthy physical activities, should be maintained.
Sweat evaporation plays a crucial role in cooling the human body, a process enabled by perspiration. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.

Humidity

The average relative humidity in December is 60%.

Rainfall

In Calai, in December, it is raining for 18.6 days, with typically 69mm (2.72") of accumulated precipitation. Throughout the year, there are 89 rainfall days, and 324mm (12.76") of precipitation is accumulated.

Daylight

With an average of 13h and 12min of daylight, December has the longest days of the year.
On the first day of December, sunrise is at 04:56 and sunset at 18:03. On the last day of the month, sunrise is at 05:08 and sunset at 18:19 WAT.

Sunshine

The average sunshine in December is 10.2h.

UV index

The months with the highest UV index are September, October and December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: An average maximum UV index of 7 in December leads to these recommendations:
Take precautions against overexposure. Protection against sun damage is needed. 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 holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.