December weather forecastCajueiro, Brazil

Weather in December

December, the first month of the summer in Cajueiro, is still a tropical month, with an average temperature varying between 21.9°C (71.4°F) and 31.2°C (88.2°F).

Temperature

December's climate shows a minor adjustment in average high-temperatures to a still tropical 31.2°C (88.2°F) from November's 30.6°C (87.1°F). During December, the temperature in Cajueiro tends to dip to an average of 21.9°C (71.4°F) at night.

Heat index

December's average heat index is computed to be a sweltering 39°C (102.2°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.
Note that heat index values are valued for light wind and location in the shade. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', determines the feeling of heat when you account for the relative humidity. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.

Humidity

With an average relative humidity of 73%, December is the least humid month in Cajueiro.

Rainfall

In Cajueiro, in December, it is raining for 9.9 days, with typically 13mm (0.51") of accumulated precipitation. Throughout the year, there are 189 rainfall days, and 375mm (14.76") of precipitation is accumulated.

Daylight

The month with the longest days is December, with an average of 12h and 42min of daylight.
On the first day of the month, sunrise is at 04:54 and sunset at 17:32. On the last day of December, in Cajueiro, sunrise is at 05:07 and sunset at 17:47 -03.

Sunshine

December has the most sunshine of the year, with an average of 8.2h of sunshine.

UV index

January through March, November and December, with an average maximum UV index of 7, are months with the highest UV index in Cajueiro. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the average person.
Note: The UV index of 7 during December translates into the following guidance:
Guard oneself from overexposure. Defence against sun injury is vital. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.