December weather forecast
Passage Fort, Jamaica

December, the first month of the winter in Passage Fort, is also a moderately hot month, with temperature in the range of an average high of 28.9°C (84°F) and an average low of 21.5°C (70.7°F).

Temperature

As December takes its course, Passage Fort's average high-temperature registers at a still moderately hot 28.9°C (84°F), closely aligning with the preceding month. Passage Fort, during the month of December, experiences an average low-temperature of 21.5°C (70.7°F).

Heat index

December's mean heat index is calculated to be a sweltering 35°C (95°F). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
Heat index evaluations are typically in the context of light winds and shaded environments. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. Rising body temperatures due to excess heat retention could signify impending heat disorders.

Humidity

The months with the highest humidity in Passage Fort are October through December, with an average relative humidity of 81%.

Rainfall

In December, the rain falls for 19.9 days. Throughout December, 42mm (1.65") of precipitation is accumulated. In Passage Fort, during the entire year, the rain falls for 265.1 days and collects up to 806mm (31.73") of precipitation.

Daylight

With an average of 11h and 6min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 06:22 and sunset at 17:30. On the last day of December, in Passage Fort, Jamaica, sunrise is at 06:38 and sunset at 17:43 EST.

Sunshine

With an average of 6.7h of sunshine, December has the least sunshine of the year.

UV index

The months with the lowest UV index in Passage Fort are January through April, September, November and December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: In December, a regular UV index of 6 translates into these guidelines:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays.