December weather forecast
Mattru, Sierra Leone

The first month of the winter, December, is still a tropical month in Mattru, Sierra Leone, with an average temperature fluctuating between 31.3°C (88.3°F) and 24.1°C (75.4°F).

Temperature

The transition into December shows a subtle variation to a still tropical 31.3°C (88.3°F) from November's 30.2°C (86.4°F) in the average high-temperature. Mattru records a steady low-temperature average of 24.1°C (75.4°F) during December.

Heat index

In December, the average heat index is estimated at a blistering 40°C (104°F). Preventive measures are required to mitigate the risk of heat cramps and heat exhaustion. Continuous activity may precipitate heatstroke.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', marries air temperature and humidity to produce a value illustrating perceived warmth. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

In Mattru, the average relative humidity in December is 74%.

Rainfall

In December, in Mattru, the rain falls for 11 days. Throughout December, 21mm (0.83") of precipitation is accumulated. In Mattru, during the entire year, the rain falls for 238.8 days and collects up to 1773mm (69.8") of precipitation.

Daylight

With an average of 11h and 42min of daylight, December has the shortest days of the year in Mattru.
On the first day of December in Mattru, sunrise is at 06:45 and sunset at 18:29. On the last day of the month, sunrise is at 07:00 and sunset at 18:43 GMT.

Sunshine

The average sunshine in December in Mattru is 9h.

UV index

The months with the highest UV index in Mattru are January through June, September through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: During December, 7 as the daily maximum UV index converts into the following advice:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.