December weather forecast
Mahajanga, Madagascar

December, the first month of the summer in Mahajanga, is still a tropical month, with an average temperature ranging between min 25.8°C (78.4°F) and max 31.3°C (88.3°F).

Temperature

In Mahajanga, Madagascar, the average high-temperature in December is practically the same as in November - a still tropical 31.3°C (88.3°F). In Mahajanga, in December, the average low-temperature is 25.8°C (78.4°F).

Heat index

In December, the average heat index is appraised at a very hot 39°C (102.2°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'feels like', 'felt air temperature', or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like pregnancy, clothing, differences in body mass, height, and shape, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial 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.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In December, the average relative humidity in Mahajanga is 71%.

Rainfall

In Mahajanga, it is raining for 23.5 days, with typically 117mm (4.61") of accumulated precipitation. In Mahajanga, during the entire year, the rain falls for 161.5 days and collects up to 817mm (32.17") of precipitation.

Sea temperature

In Mahajanga, the average seawater temperature in December is 29.3°C (84.7°F).
Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

December has the longest days of the year in Mahajanga, with an average of 13h and 2min of daylight.
On the first day of December, sunrise is at 05:13 and sunset at 18:13. On the last day of the month, sunrise is at 05:26 and sunset at 18:28 EAT.

Sunshine

The average sunshine in December is 11.2h.

UV index

January through May, August through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: In December, the average maximum UV index of 7 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.