December weather - Summer 2024

Weather in December
Frequently asked questions
Average temperature in December
Average pressure in December
Average wind speed in December
Average humidity in December
Average rainfall in December
Average rainfall days in December
Average daylight in December
Average sunshine in December
Average sunshine days in December
Average UV index in December
Average cloud cover in December
Average visibility in December

A road network in Brasília, Brazil with an extension of the entire city layout

Weather in December

In December, rainfall eases slightly from November's high to 181mm (7.13") in Brasília, Brazil. December still maintains substantial rain but is relatively drier than November. The end of the year sees a slight decrease in cloud coverage, despite remaining one of the wetter months. Unlike the persistent pattern of increasing rain, the wind gusts marginally increase from November. Even though December marks the end of the calendar year, the weather patterns continue their course into the next year.

Temperature

The transition into December in Brasília marks the average high-temperature at a still warm 25.8°C (78.4°F), differing minimally from November's 26.3°C (79.3°F). During the month of December, Brasília anticipates a mean low-temperature of 18.7°C (65.7°F).

Humidity

In Brasília, the average relative humidity in December is 84%.

Rainfall

In Brasília, in December, it is raining for 27.5 days, with typically 181mm (7.13") of accumulated precipitation. In Brasília, during the entire year, the rain falls for 191.9 days and collects up to 1159mm (45.63") of precipitation.

Daylight

With an average of 13h and 6min of daylight, December has the longest days of the year.
On the first day of the month, sunrise is at 05:30 and sunset at 18:30. On the last day of December, sunrise is at 05:43 and sunset at 18:46 -03.

Sunshine

November and December, with an average of 7.5h of sunshine, are months with the least sunshine.

UV index

February, April through July and December, with an average maximum UV index of 5, are months with the lowest UV index. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum UV index, 5 during December, leads to the following recommendations:
Take precautions - Protection against sunburn is recommended. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.

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Frequently asked questions

What is the usual temperature for Brasília in December?

In Brasília, in December, the average high-temperature is 25.8°C (78.4°F), and the average low-temperature is 18.7°C (65.7°F). The average heat index (a.k.a. 'real feel', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in October is estimated at 32°C (89.6°F).

What is the average humidity in December in Brasília?

In December, the average relative humidity in Brasília is 84%.

How many days does it rain in December in Brasília?

In Brasília, Brazil, in December, during 27.5 rainfall days, 181mm (7.13") of precipitation is typically accumulated.

When are the longest days in Brasília?

December has the longest days of the year in Brasília, Brazil, with an average of 13h and 6min of daylight.

What is the average length of the day in December in Brasília?

In December, the average day length is 13h and 3min.

When is the sunrise / sunset in December in Brasília?

In December, on the first day of the month, sunrise is at 05:30 and sunset at 18:30. On the last day of the month, sunrise is at 05:43 and sunset at 18:46 -03.

What is the month with the least sunshine in Brasília?

November and December, with an average of 7.5h of sunshine, are months with the least sunshine in Brasília.

How long on average sun shines in December in Brasília?

In Brasília, Brazil, the average sunshine duration in December is 7.5h.

What is the month with the lowest UV index in Brasília?

February, April through July and December, with an average maximum UV index of 5, are months with the lowest UV index in Brasília.

How high is the UV index in December in Brasília?

The average daily maximum UV index in December is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from 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

26.3°C 79.3°F

25.8°C 78.4°F

25.9°C 78.6°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

8.4km/h 5.2mph

8.5km/h 5.3mph

8.4km/h 5.2mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

2.6

4.9

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Brasília, Brazil

Average high temperature in December: 25.8°C

The warmest month (with the highest average high temperature) is September (30.4°C).
The month with the lowest average high temperature is June (24.6°C).

Average low temperature in December: 18.7°C

The month with the highest average low temperature is October (19.5°C).
The coldest month (with the lowest average low temperature) is July (14.6°C).

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Average pressure in December
Brasília, Brazil

Average pressure in December: 1011.9mbar

The month with the highest atmospheric pressure is July (1018.3mbar).
The month with the lowest atmospheric pressure is November (1011.6mbar).

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Average wind speed in December
Brasília, Brazil

Average wind speed in December: 7.7km/h

The windiest month (with the highest average wind speed) is August (10.3km/h).
The calmest month (with the lowest average wind speed) is March (7km/h).

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Average humidity in December
Brasília, Brazil

Average humidity in December: 84%

The month with the highest relative humidity is March (87%).
The month with the lowest relative humidity is September (45%).

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Average rainfall in December
Brasília, Brazil

Average rainfall in December: 181mm

The wettest month (with the highest rainfall) is November (254mm).
The driest month (with the least rainfall) is July (1mm).

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Average rainfall days in December
Brasília, Brazil

Average rainfall days in December: 27.5 days

The month with the highest number of rainy days is December (27.5 days).
The month with the least rainy days is July (1.8 days).

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

Average daylight in December: 13h and 1min

The month with the longest days is December (Average daylight: 13h and 6min).
The month with the shortest days is June (Average daylight: 11h and 12min).

Average sunshine in December: 7h and 3min

The month with the most sunshine is August (Average sunshine: 9h and 54min).
The months with the least sunshine are November and December (Average sunshine: 7h and 30min).

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Average sunshine days in December
Brasília, Brazil

Average sunshine days in December: 2.6 days

The month with the most sunshine days is July (29.2 days).
The month with the least sunshine days is November (2 days).

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Average UV index in December
Brasília, Brazil

Average UV index in December: 5

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

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Average cloud cover in December
Brasília, Brazil

Average cloud cover in December: 53

The month with the most cloud cover is March (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 12).

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Average visibility in December
Brasília, Brazil

Average visibility in December: 8km

The months with the highest visibility are July, August and September (10km).
The months with the lowest visibility are January, February, March and April (7km).

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December weather forecast
Brasília, Brazil

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