December weather forecastMendonça, Brazil

December

Weather in December

December, the first month of the summer in Mendonça, is also a moderately hot month, with an average temperature ranging between min 21.2°C (70.2°F) and max 29.8°C (85.6°F).

Temperature

The arrival of December coincides with an average high-temperature of a moderately hot 29.8°C (85.6°F), indicating a minimal shift from November's 30°C (86°F). Throughout the month of December, the nighttime temperature dips to an average of 21.2°C (70.2°F).

Heat index

Throughout December, the heat index is evaluated at a fiery hot 37°C (98.6°F). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.
Heat index's context suggests values are appropriate for shady areas and slight breezes. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', embodies the combination of air temperature and moisture content to illustrate perceived heat. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
The natural method the human body uses to remove excess heat is by perspiring and letting sweat evaporate. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.

Humidity

The average relative humidity in December is 81%.

Rainfall

In Mendonça, in December, it is raining for 28.5 days, with typically 201mm (7.91") of accumulated precipitation. In Mendonça, during the entire year, the rain falls for 208.9 days and collects up to 1257mm (49.49") of precipitation.

Daylight

The month with the longest days is December, with an average of 13h and 24min of daylight.
On the first day of December, sunrise is at 05:27 and sunset at 18:47. On the last day of the month, sunrise is at 05:39 and sunset at 19:03 -03.

Sunshine

The average sunshine in December is 7.6h.

UV index

January, March through December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: A daily maximum UV index of 6 in December translates into the following instructions:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.

Updated: Aug 31, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

An average high-temperature, in December, in Mendonça, is 29.8°C (85.6°F) and the average low-temperature is 21.2°C (70.2°F). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in December is evaluated at 37°C (98.6°F).

In Mendonça, the average relative humidity in December is 81%.

In Mendonça, in December, it is raining for 28.5 days, with typically 201mm (7.91") of accumulated precipitation.

The month with the longest days is December, with an average of 13h and 24min of daylight.

The average day length in December is 13h and 24min.

In December, on the first day of the month, sunrise is at 05:27 and sunset at 18:47. On the last day of the month, sunrise is at 05:39 and sunset at 19:03 -03.

In Mendonça, the average sunshine duration in December is 7.6h.

The months with the highest UV index are January, March through December, with an average maximum UV index of 6.

In December, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health threat 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

30°C

29.8°C

29°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

9.6km/h

8.7km/h

8.2km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

4.5

1.6

1.1

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Mendonça, Brazil

Average high temperature in December: 29.8°C

The warmest month (with the highest average high temperature) is September (32.2°C).
The month with the lowest average high temperature is June (25.3°C).

Average low temperature in December: 21.2°C

The month with the highest average low temperature is December (21.2°C).
The coldest month (with the lowest average low temperature) is June (15.5°C).

Average pressure in December
Mendonça, Brazil

Average pressure in December: 1010mbar

The month with the highest atmospheric pressure is July (1017.9mbar).
The months with the lowest atmospheric pressure are November and December (1010mbar).

Average wind speed in December
Mendonça, Brazil

Average wind speed in December: 7.8km/h

The windiest months (with the highest average wind speed) are August and September (10km/h).
The calmest month (with the lowest average wind speed) is February (6.9km/h).

Average humidity in December
Mendonça, Brazil

Average humidity in December: 81%

The month with the highest relative humidity is March (86%).
The months with the lowest relative humidity are August and September (52%).

Average rainfall in December
Mendonça, Brazil

Average rainfall in December: 201mm

The wettest month (with the highest rainfall) is January (224mm).
The driest month (with the least rainfall) is August (9mm).

Average rainfall days in December
Mendonça, Brazil

Average rainfall days in December: 28.5 days

The month with the highest number of rainy days is January (29.6 days).
The month with the least rainy days is August (3.3 days).

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

Average daylight in December: 13h and 24min

The month with the longest days is December (Average daylight: 13h and 24min).
The month with the shortest days is June (Average daylight: 10h and 54min).

Average sunshine in December: 7h and 36min

The month with the most sunshine is August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 7h and 0min).

Average sunshine days in December
Mendonça, Brazil

Average sunshine days in December: 1.6 days

The month with the most sunshine days is August (26.9 days).
The month with the least sunshine days is January (1.1 days).

Average UV index in December
Mendonça, Brazil

Average UV index in December: 6

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