December weather forecast
Waterloo, Sierra Leone

Waterloo's weather in December sees the year's lowest rainfall, merely 7mm (0.28"), distinctly contrasting the past high rainfall months. The decrease in cloud coverage allows for more bright, sunny hours despite the slight dip in daylight. The continual drop in wind speed ensures a calm, quiet end to the year. With low rainfall and steady temperatures, the city rounds off the year on a relatively dry note. The weather trends observed in December give a glimpse of what to anticipate in the New Year.

Temperature

Waterloo's shift into December sets the average high-temperature at a still tropical 31°C (87.8°F), a figure that deviates only slightly from November's 30.1°C (86.2°F). An average nighttime temperature of 24.5°C (76.1°F) is recorded during December.

Heat index

For December, the heat index is calculated to be a sweltering 37°C (98.6°F). Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.
Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'real feel' or 'feels like', reflects the feeling of heat when considering both air temperature and humidity. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. An increase in relative humidity disrupts body cooling by slowing the evaporation rate, thereby reducing the rate at which the body cools and amplifying the sense of heat. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.

Humidity

In December, the average relative humidity is 69%.

Rainfall

In December, the rain falls for 4 days. Throughout December, 7mm (0.28") of precipitation is accumulated. In Waterloo, Sierra Leone, during the entire year, the rain falls for 205.9 days and collects up to 1507mm (59.33") of precipitation.

Daylight

The month with the shortest days is December, with an average of 11h and 42min of daylight.
On the first day of the month, sunrise is at 06:51 and sunset at 18:31. On the last day of December, sunrise is at 07:06 and sunset at 18:44 GMT.

Sunshine

In December, the average sunshine in Waterloo, Sierra Leone, is 9.7h.

UV index

January through June, September through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The UV index of 7 in December translates into these instructions:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. During bright days, sunglasses that offer UVA and UVB defense are recommended.