December weather forecastRio dos Índios, Brazil

December

Weather in December

The first month of the summer, December, is still a warm month in Rio dos Índios, Brazil, with an average temperature fluctuating between 28.3°C (82.9°F) and 17.5°C (63.5°F).

Temperature

Entering December, the average high-temperature is recorded at a still moderately hot 28.3°C (82.9°F), exhibiting a minimal shift from November's 27.1°C (80.8°F). Rio dos Índios reports an average low-temperature of 17.5°C (63.5°F) during the nights of December.

Heat index

In December, the heat index is estimated at a hot 33°C (91.4°F). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.
Records show heat index calculations are tailored for shaded regions and mild winds. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. 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. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.

Humidity

In Rio dos Índios, the average relative humidity in December is 80%.

Rainfall

In Rio dos Índios, in December, during 21.1 rainfall days, 141mm (5.55") of precipitation is typically accumulated. In Rio dos Índios, Brazil, during the entire year, the rain falls for 208.7 days and collects up to 1557mm (61.3") of precipitation.

Snowfall

In Rio dos Índios, snow does not fall in January through June, September through December.

Daylight

With an average of 13h and 48min of daylight, December has the longest days of the year in Rio dos Índios.
On the first day of December, sunrise is at 05:28 and sunset at 19:12. On the last day of the month, sunrise is at 05:39 and sunset at 19:29 -03.

Sunshine

The average sunshine in December is 8.5h.

UV index

In December, the average daily maximum UV index in Rio dos Índios is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.
Note: The daily high UV index of 5 during December translates into the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.

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

Frequently asked questions

In Rio dos Índios, 28.3°C (82.9°F) is the average high-temperature and 17.5°C (63.5°F) is the average low-temperature during December. In December, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines air temperature and relative humidity, is estimated at 33°C (91.4°F).

In Rio dos Índios, Brazil, the average relative humidity in December is 80%.

In December, the rain falls for 21.1 days. Throughout December, 141mm (5.55") of precipitation is accumulated.

January through June, September through December are months without snowfall in Rio dos Índios.

With an average of 13h and 48min of daylight, December has the longest days of the year.

The average day length in December in Rio dos Índios is 13h and 50min.

On the first day of December in Rio dos Índios, Brazil, sunrise is at 05:28 and sunset at 19:12. On the last day of the month, sunrise is at 05:39 and sunset at 19:29 -03.

In Rio dos Índios, the average sunshine duration in December is 8.5h.

In December, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

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

Nov

December

Jan

Average high temperature

27.1°C

28.3°C

28.4°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

8.9km/h

8.6km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

18.5

21.1

22.9

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

7.8

7.3

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Rio dos Índios, Brazil

Average high temperature in December: 28.3°C

The warmest months (with the highest average high temperature) are January and February (28.4°C).
The month with the lowest average high temperature is June (19.1°C).

Average low temperature in December: 17.5°C

The months with the highest average low temperature are January and February (17.8°C).
The coldest month (with the lowest average low temperature) is July (10.3°C).

Average pressure in December
Rio dos Índios, Brazil

Average pressure in December: 1011mbar

The month with the highest atmospheric pressure is July (1019.6mbar).
The month with the lowest atmospheric pressure is December (1011mbar).

Average wind speed in December
Rio dos Índios, Brazil

Average wind speed in December: 8km/h

The windiest month (with the highest average wind speed) is August (9.3km/h).
The calmest month (with the lowest average wind speed) is March (7.7km/h).

Average humidity in December
Rio dos Índios, Brazil

Average humidity in December: 80%

The month with the highest relative humidity is June (87%).
The month with the lowest relative humidity is September (78%).

Average rainfall in December
Rio dos Índios, Brazil

Average rainfall in December: 141mm

The wettest month (with the highest rainfall) is October (179mm).
The driest month (with the least rainfall) is August (79mm).

Average rainfall days in December
Rio dos Índios, Brazil

Average rainfall days in December: 21.1 days

The month with the highest number of rainy days is January (22.9 days).
The month with the least rainy days is August (12.5 days).

Average snowfall days in December
Rio dos Índios, Brazil

Average snowfall days in December: 0 days

The months with the highest number of snowfall days are July and August (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, September, October, November and December (0 days).

Average daylight in December /
Average sunshine in December
Rio dos Índios, Brazil

Average daylight in December: 13h and 48min

The month with the longest days is December (Average daylight: 13h and 48min).
The month with the shortest days is June (Average daylight: 10h and 24min).

Average sunshine in December: 8h and 30min

The month with the most sunshine is November (Average sunshine: 8h and 42min).
The months with the least sunshine are May and June (Average sunshine: 7h and 24min).

Average sunshine days in December
Rio dos Índios, Brazil

Average sunshine days in December: 7.8 days

The month with the most sunshine days is August (16.7 days).
The month with the least sunshine days is February (5 days).

Average UV index in December
Rio dos Índios, Brazil

Average UV index in December: 5

The months with the highest UV index are January, February and March (UV index 6).
The months with the lowest UV index are May, June and July (UV index 4).