December weather forecast
Bacabal, Brazil

December, the first month of the summer in Bacabal, is still a hot month, with an average temperature fluctuating between 32.7°C (90.9°F) and 23°C (73.4°F).

Temperature

The onset of December manifests an average high-temperature of a still hot 32.7°C (90.9°F), demonstrating a minor variation from the preceding month. Bacabal's temperature lowers to a mean of 23°C (73.4°F) during the nights in December.

Heat index

In December, the average heat index is evaluated at a blazing hot 46°C (114.8°F). Take caution: Heat exhaustion and heat cramps are probable. Heatstroke may be imminent with ongoing effort.
Remember that heat index calculations are made for conditions in the shade with light wind. 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' or 'feels like', comes about by integrating the temperature readings with the humidity levels. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.

Humidity

The average relative humidity in December is 77%.

Rainfall

In Bacabal, in December, during 26.2 rainfall days, 144mm (5.67") of precipitation is typically accumulated. Throughout the year, there are 252.6 rainfall days, and 1329mm (52.32") of precipitation is accumulated.

Daylight

December has the longest days of the year, with an average of 12h and 24min of daylight.
On the first day of December in Bacabal, sunrise is at 05:37 and sunset at 17:58. On the last day of the month, sunrise is at 05:51 and sunset at 18:13 -03.

Sunshine

In Bacabal, Brazil, the average sunshine in December is 7.9h.

UV index

The months with the lowest UV index are January through April, June and December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum UV index of 6 during December leads to these instructions:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.