December weather forecast
Barra do Garças, Brazil

December, the first month of the summer in Barra do Garças, is still a hot month, with an average temperature varying between 21.5°C (70.7°F) and 30.4°C (86.7°F).

Temperature

Barra do Garças transitions into December recording an average high-temperature of a still hot 30.4°C (86.7°F), closely aligning with the preceding month's temperature. Barra do Garças's average low-temperature in December is measured at an agreeable 21.5°C (70.7°F).

Heat index

The heat index value for December is evaluated at a torrid 39°C (102.2°F). Implement additional preventive actions, heat cramps and heat exhaustion are potential hazards. Heatstroke could follow prolonged activity.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is an aggregate value of air's warmth and moisture to show the human-felt temperature. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. 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. As body temperatures escalate without effective heat release, one might face dehydration threats.

Humidity

In December, the average relative humidity is 81%.

Rainfall

In December, the rain falls for 27.6 days. Throughout December, 143mm (5.63") of precipitation is accumulated. In Barra do Garças, Brazil, during the entire year, the rain falls for 187.5 days and collects up to 873mm (34.37") of precipitation.

Daylight

December has the longest days of the year in Barra do Garças, with an average of 13h and 6min of daylight.
On the first day of the month, sunrise is at 04:48 and sunset at 17:48. On the last day of December, sunrise is at 05:00 and sunset at 18:04 -04.

Sunshine

The average sunshine in December is 8.8h.

UV index

January through July, October through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: A maximum UV index of 6 in December translates into the following recommendations:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Experience reduced UV exposure by about half when donning a wide-brim hat.