December weather forecast
Passo, Brazil

December, the first month of the summer in Passo, is a tropical month, with an average temperature ranging between min 19.7°C (67.5°F) and max 31.5°C (88.7°F).

Temperature

Stepping into December, Passo records an average high-temperature of a tropical 31.5°C (88.7°F), almost consistent with November. Passo records an average nighttime low of 19.7°C (67.5°F) in December.

Heat index

The heat index for December is evaluated at a very hot 39°C (102.2°F). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
When assessing, remember that heat index measurements are for light winds and shaded spots. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'feels like', combines both the air temperature and the humidity level to give a perceived human temperature. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values hold particular importance for children. Juveniles are regularly less conscious of the need to recuperate and rehydrate. Thirst is a tardy symptom of dehydration - hydration, especially during lengthy physical activities, should be maintained.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

January and December, with an average relative humidity of 69%, are the least humid months.

Rainfall

In Passo, Brazil, in December, it is raining for 12.9 days, with typically 100mm (3.94") of accumulated precipitation. In Passo, during the entire year, the rain falls for 141.1 days and collects up to 970mm (38.19") of precipitation.

Daylight

With an average of 13h and 54min of daylight, December has the longest days of the year.
On the first day of December, sunrise is at 05:38 and sunset at 19:28. On the last day of the month, sunrise is at 05:49 and sunset at 19:45 -03.

Sunshine

November and December, with an average of 8.9h of sunshine, are months with the most sunshine.

UV index

January and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index of 7 in December converts into the following recommendations:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. 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. A hat with a broad brim is indispensable, filtering out up to half of UV rays.