December weather forecast
Charlestown, Guyana

The first month of the winter, December, is also a moderately hot month in Charlestown, Guyana, with an average temperature varying between 29.9°C (85.8°F) and 22.4°C (72.3°F).

Temperature

In December, Charlestown experiences a minor shift in meteorological conditions with average high-temperatures marked at a moderately hot 29.9°C (85.8°F), closely mirroring the climate in November. December nights are marked by an average temperature drop to a pleasant 22.4°C (72.3°F).

Heat index

The heat index in December is evaluated at a sweltering 39°C (102.2°F). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.
One should consider that heat index numbers are for shaded settings and light wind. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
Sweat evaporation plays a crucial role in cooling the human body, a process enabled by perspiration. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

The average relative humidity in December in Charlestown is 84%.

Rainfall

In December, the rain falls for 29.1 days. Throughout December, 138mm (5.43") of precipitation is accumulated. Throughout the year, in Charlestown, there are 312.9 rainfall days, and 1254mm (49.37") of precipitation is accumulated.

Daylight

The month with the shortest days in Charlestown is December, with an average of 11h and 42min of daylight.
On the first day of the month, sunrise is at 05:49 and sunset at 17:34. On the last day of December, sunrise is at 06:03 and sunset at 17:48 -04.

Sunshine

In Charlestown, Guyana, the average sunshine in December is 6.7h.

UV index

The months with the lowest UV index in Charlestown are January, February, May, June and December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: The UV index of 6 during December translates into the following guidance:
Resist overexposure. Safeguarding from solar damage is indispensable. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.