January weather forecast
Kingston, Jamaica

January, the same as December, in Kingston, Jamaica, is another tropical winter month, with an average temperature fluctuating between 21.1°C (70°F) and 30.3°C (86.5°F).
The ideal sea water temperature of 27.1°C (80.8°F) and only 5 rainfall days, with 18mm (0.71") of accumulated rainfall, makes January the best time for swimming and other water activities.

Temperature

In Kingston, the average high-temperature in January is relatively the same as in December - a still tropical 30.3°C (86.5°F). The average low-temperature, is 21.1°C (70°F).

Heat index

The average heat index in January is evaluated at a sweltering 37°C (98.6°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. 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', 'feels like', 'real feel', or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (wind, metabolic differences, clothing). 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.
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 January, the average relative humidity is 74%.

Rainfall

January is the month with the least rainfall in Kingston. Rain falls for 5 days and accumulates 18mm (0.71") of precipitation.

Sea temperature

In January, the average sea temperature is 27.1°C (80.8°F).
Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

In Kingston, the average length of the day in January is 11h and 11min.
On the first day of the month, sunrise is at 06:38 and sunset at 17:43. On the last day of January, in Kingston, sunrise is at 06:40 and sunset at 18:01 EST.

Sunshine

In Kingston, the average sunshine in January is 8.3h.

UV index

January and December, with an average maximum UV index of 8, are months with the lowest UV index in Kingston. A UV Index value of 8 to 10 symbolizes a very high health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 8 in January interpret into the following advice:
Take special precautions, as unprotected eyes and skin can be burned and damaged quickly. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.