December weather forecastBarra do Jacaré, Brazil

December

Weather in December

December, the first month of the summer in Barra do Jacaré, is also a moderately hot month, with an average temperature fluctuating between 28.7°C (83.7°F) and 18.8°C (65.8°F).

Temperature

Barra do Jacaré notes the warmest temperatures in December, with a high average of 28.7°C (83.7°F) and a low of 18.8°C (65.8°F).

Heat index

The heat index value for December is appraised at a sweltering 35°C (95°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Know that the heat index computations account for shaded terrains and slight winds. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is achieved by amalgamating air temperature with the relative humidity readings. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
As a reaction to high temperatures, the human body begins to perspire, using the evaporation of sweat to lower its temperature. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.

Humidity

The average relative humidity in December is 83%.

Rainfall

In December, the rain falls for 26.1 days. Throughout December, 156mm (6.14") of precipitation is accumulated. Throughout the year, there are 203.9 rainfall days, and 1255mm (49.41") of precipitation is accumulated.

Daylight

With an average of 13h and 30min of daylight, December has the longest days of the year.
On the first day of December in Barra do Jacaré, sunrise is at 05:26 and sunset at 18:53. On the last day of the month, sunrise is at 05:38 and sunset at 19:09 -03.

Sunshine

In December, the average sunshine is 7.6h.

UV index

The average daily maximum UV index in December is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 5 during December translates into these guidelines:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.

Updated: Aug 5, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The warmest temperatures occur during December, when averages reach a peak of 28.7°C (83.7°F) and a low of 18.8°C (65.8°F).

The average high-temperature, in December, in Barra do Jacaré, is 28.7°C (83.7°F), while the average low-temperature is 18.8°C (65.8°F). In December, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which factors the actual air temperature with the relative humidity, is appraised at 35°C (95°F).

The average relative humidity in December is 83%.

In Barra do Jacaré, in December, during 26.1 rainfall days, 156mm (6.14") of precipitation is typically accumulated.

December has the longest days of the year, with an average of 13h and 30min of daylight.

The average day length in December is 13h and 32min.

On the first day of December, sunrise is at 05:26 and sunset at 18:53. On the last day of the month, sunrise is at 05:38 and sunset at 19:09 -03.

The average sunshine duration in December is 7.6h.

In December, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium health risk 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

28.3°C

28.7°C

27.9°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

11km/h

9.3km/h

8.7km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

8.1

2.8

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Barra do Jacaré, Brazil

Average high temperature in December: 28.7°C

The warmest month (with the highest average high temperature) is December (28.7°C).
The month with the lowest average high temperature is June (21.8°C).

Average low temperature in December: 18.8°C

The month with the highest average low temperature is January (19.2°C).
The coldest months (with the lowest average low temperature) are June and July (13.1°C).

Average pressure in December
Barra do Jacaré, Brazil

Average pressure in December: 1011.1mbar

The month with the highest atmospheric pressure is July (1019.3mbar).
The month with the lowest atmospheric pressure is December (1011.1mbar).

Average wind speed in December
Barra do Jacaré, Brazil

Average wind speed in December: 8.5km/h

The windiest month (with the highest average wind speed) is September (10.2km/h).
The calmest month (with the lowest average wind speed) is February (7.7km/h).

Average humidity in December
Barra do Jacaré, Brazil

Average humidity in December: 83%

The months with the highest relative humidity are February and March (87%).
The month with the lowest relative humidity is September (69%).

Average rainfall in December
Barra do Jacaré, Brazil

Average rainfall in December: 156mm

The wettest month (with the highest rainfall) is January (226mm).
The driest month (with the least rainfall) is August (32mm).

Average rainfall days in December
Barra do Jacaré, Brazil

Average rainfall days in December: 26.1 days

The month with the highest number of rainy days is January (27.3 days).
The month with the least rainy days is August (7.2 days).

Average daylight in December /
Average sunshine in December
Barra do Jacaré, Brazil

Average daylight in December: 13h and 30min

The month with the longest days is December (Average daylight: 13h and 30min).
The month with the shortest days is June (Average daylight: 10h and 42min).

Average sunshine in December: 7h and 36min

The month with the most sunshine is August (Average sunshine: 9h and 6min).
The month with the least sunshine is January (Average sunshine: 6h and 54min).

Average sunshine days in December
Barra do Jacaré, Brazil

Average sunshine days in December: 4 days

The month with the most sunshine days is August (22.5 days).
The month with the least sunshine days is February (2.1 days).

Average UV index in December
Barra do Jacaré, Brazil

Average UV index in December: 5

The months with the highest UV index are January, March, October and November (UV index 6).
The month with the lowest UV index is May (UV index 4).

Average cloud cover in December
Barra do Jacaré, Brazil

Average cloud cover in December: 51

The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 23).

Average visibility in December
Barra do Jacaré, Brazil

Average visibility in December: 8km

The months with the highest visibility are July, August, September and October (9km).
The months with the lowest visibility are January, February, March, April and May (7km).