, like December
, in Juba
, South Sudan
, is a very hot winter month, with average temperature fluctuating between 36.8°C (98.2°F) and 20.1°C (68.2°F).
In Juba, the average high-temperature in January is relatively the same as in December - a still torrid 36.8°C (98.2°F). In Juba, South Sudan, in January, the average low-temperature is 20.1°C (68.2°F).
The average heat index is evaluated at a scorching 42.4°C (108.3°F). Beware
: Heat cramps and heat exhaustion are very likely. Heatstroke is imminent with prolonged activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.Note
: The heat index, also known as 'apparent temperature', 'real feel', 'felt air temperature', or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Additional factors like metabolic differences, pregnancy, 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 particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. 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.
In January, the average relative humidity is 44%.
January is the month with the least rainfall in Juba. Rain falls for 1.4 days and accumulates 5.1mm (0.2") of precipitation.
In January, the average length of the day in Juba, South Sudan, is 11.9h.
With an average of 9h of sunshine, January has the most sunshine of the year.
January through May
, with an average maximum UV index of 12, are months with the highest UV index in Juba. A UV Index of 11, and more, symbolizes an extreme threat to health from the exposure to the Sun's UV radiation for average individuals.Note
: In January, the average maximum UV index of 12 translate into the following recommendations:
Practice all essential precautions. Protection against sun damage is crucial. 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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim.