December weather forecastCortês, Brazil

December

Weather in December

December, the first month of the summer in Cortês, is also a moderately hot month, with an average temperature varying between 21.2°C (70.2°F) and 29.9°C (85.8°F).

Temperature

Transitioning into December, Cortês experiences an average high-temperature of a still moderately hot 29.9°C (85.8°F), marking a minor shift from the preceding month. Throughout the nights in December, Cortês experiences an average low-temperature of 21.2°C (70.2°F).

Heat index

For December, the heat index is computed to be a torrid 37°C (98.6°F). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
For clarity, heat index numbers account for light winds and areas under shade. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', embodies the combination of air temperature and moisture content to illustrate perceived heat. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.

Humidity

With an average relative humidity of 77%, December is the least humid month.

Rainfall

November and December are months with the least rain in Cortês when the rain falls for 11.3 days and typically aggregates up to 13mm (0.51") of rain.

Daylight

The month with the longest days is December, with an average of 12h and 36min of daylight.
On the first day of the month, sunrise is at 04:53 and sunset at 17:28. On the last day of December, sunrise is at 05:07 and sunset at 17:43 -03.

Sunshine

The average sunshine in December is 7.1h.

UV index

January through May, September through December, with an average maximum UV index of 6, are months with the highest UV index in Cortês. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: The UV index of 6 during December leads to these advisories:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.

Updated: Feb 2, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The high-temperature, in December, in Cortês, is 29.9°C (85.8°F), while the low-temperature averages to 21.2°C (70.2°F). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in December is computed to be 37°C (98.6°F).

December is the least humid month in Cortês, Brazil, with an average relative humidity of 77%.

The average relative humidity in December in Cortês is 77%.

November and December are months with the least rain in Cortês when the rain falls for 11.3 days and typically aggregates up to 13mm (0.51") of rain.

In Cortês, in December, during 11.3 rainfall days, 13mm (0.51") of precipitation is typically accumulated.

December has the longest days of the year in Cortês, with an average of 12h and 36min of daylight.

The average day length in December is 12h and 37min.

In December, on the first day of the month, sunrise is at 04:53 and sunset at 17:28. On the last day of the month, in Cortês, Brazil, sunrise is at 05:07 and sunset at 17:43 -03.

The average sunshine duration in December in Cortês is 7.1h.

The months with the highest UV index in Cortês, Brazil, are January through May, September through December, with an average maximum UV index of 6.

In December, the average daily maximum UV index in Cortês is 6. A UV Index of 6 to 7 symbolizes a high health threat from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

29.3°C

29.9°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

11.9km/h

10.7km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

12.7

16.7

15.6

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Cortês, Brazil

Average high temperature in December: 29.9°C

The warmest month (with the highest average high temperature) is March (31°C).
The month with the lowest average high temperature is July (25.3°C).

Average low temperature in December: 21.2°C

The month with the highest average low temperature is March (21.8°C).
The coldest month (with the lowest average low temperature) is August (18.6°C).

Average pressure in December
Cortês, Brazil

Average pressure in December: 1012.5mbar

The month with the highest atmospheric pressure is August (1016.9mbar).
The months with the lowest atmospheric pressure are February and March (1012.2mbar).

Average wind speed in December
Cortês, Brazil

Average wind speed in December: 10.2km/h

The windiest month (with the highest average wind speed) is October (10.4km/h).
The calmest month (with the lowest average wind speed) is April (7.7km/h).

Average humidity in December
Cortês, Brazil

Average humidity in December: 77%

The month with the highest relative humidity is July (90%).
The month with the lowest relative humidity is December (77%).

Average rainfall in December
Cortês, Brazil

Average rainfall in December: 13mm

The wettest month (with the highest rainfall) is July (84mm).
The driest months (with the least rainfall) are November and December (13mm).

Average rainfall days in December
Cortês, Brazil

Average rainfall days in December: 11.3 days

The month with the highest number of rainy days is July (26.2 days).
The month with the least rainy days is March (11 days).

Average daylight in December /
Average sunshine in December
Cortês, Brazil

Average daylight in December: 12h and 36min

The month with the longest days is December (Average daylight: 12h and 36min).
The month with the shortest days is June (Average daylight: 11h and 36min).

Average sunshine in December: 7h and 6min

The month with the most sunshine is March (Average sunshine: 7h and 18min).
The month with the least sunshine is July (Average sunshine: 5h and 12min).

Average sunshine days in December
Cortês, Brazil

Average sunshine days in December: 16.7 days

The month with the most sunshine days is March (19.1 days).
The month with the least sunshine days is August (2 days).

Average UV index in December
Cortês, Brazil

Average UV index in December: 6

The months with the highest UV index are January, February, March, April, May, September, October, November and December (UV index 6).
The months with the lowest UV index are June, July and August (UV index 5).

Average cloud cover in December
Cortês, Brazil

Average cloud cover in December: 50

The month with the most cloud cover is July (Cloud cover 68).
The months with the least cloud cover are March, November and December (Cloud cover 50).