December weather forecastMarilac, Brazil

December

Weather in December

December, the first month of the summer in Marilac, is also a moderately hot month, with temperature in the range of an average high of 28.8°C (83.8°F) and an average low of 20.5°C (68.9°F).

Temperature

The onset of December is marked with a high temperature of a still moderately hot 28.8°C (83.8°F), reflecting the same conditions as November. In December, the temperature drops to an average of 20.5°C (68.9°F) at night.

Heat index

During December, the heat index is estimated at a sweltering 35°C (95°F). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.
In reference to the heat index, it's for places in shade and with a slight wind. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', measures the perceived warmth when incorporating the humidity present in the air. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

The most humid month is December, with an average relative humidity of 85%.

Rainfall

December is the month with the most rainfall. Rain falls for 23.4 days and accumulates 185mm (7.28") of precipitation.

Daylight

With an average of 13h and 12min of daylight, December has the longest days of the year.
On the first day of the month, sunrise is at 05:02 and sunset at 18:12. On the last day of December, sunrise is at 05:14 and sunset at 18:28 -03.

Sunshine

The average sunshine in December is 7.1h.

UV index

January through May, August through December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: In December, an average UV index of 6 transforms into the following instructions:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.

Updated: Jul 29, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The high-temperature, in December, in Marilac, is 28.8°C (83.8°F), while the low-temperature averages to 20.5°C (68.9°F). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines air temperature and relative humidity, in December is estimated at 35°C (95°F).

With an average relative humidity of 85%, December is the most humid month in Marilac.

In December, the average relative humidity is 85%.

The month with the most rainfall is December, when the rain falls for 23.4 days and typically aggregates up to 185mm (7.28") of precipitation.

In Marilac, during December, the rain falls for 23.4 days and regularly aggregates up to 185mm (7.28") of precipitation.

December has the longest days of the year, with an average of 13h and 12min of daylight.

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

On the first day of December, sunrise is at 05:02 and sunset at 18:12. On the last day of the month, sunrise is at 05:14 and sunset at 18:28 -03.

In December, the average sunshine duration is 7.1h.

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

In Marilac, the average daily maximum UV index in December is 6. A UV Index reading of 6 to 7 represents a high health threat from unprotected exposure to 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

28.8°C

29.8°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

7.7km/h

6.7km/h

6.6km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

6.4

8.7

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Marilac, Brazil

Average high temperature in December: 28.8°C

The warmest month (with the highest average high temperature) is October (30°C).
The month with the lowest average high temperature is June (25.8°C).

Average low temperature in December: 20.5°C

The month with the highest average low temperature is December (20.5°C).
The coldest month (with the lowest average low temperature) is July (15.8°C).

Average pressure in December
Marilac, Brazil

Average pressure in December: 1013mbar

The month with the highest atmospheric pressure is July (1021mbar).
The month with the lowest atmospheric pressure is December (1013mbar).

Average wind speed in December
Marilac, Brazil

Average wind speed in December: 6km/h

The windiest month (with the highest average wind speed) is October (7.8km/h).
The calmest month (with the lowest average wind speed) is May (4.4km/h).

Average humidity in December
Marilac, Brazil

Average humidity in December: 85%

The month with the highest relative humidity is December (85%).
The month with the lowest relative humidity is September (66%).

Average rainfall in December
Marilac, Brazil

Average rainfall in December: 185mm

The wettest month (with the highest rainfall) is December (185mm).
The driest month (with the least rainfall) is July (6mm).

Average rainfall days in December
Marilac, Brazil

Average rainfall days in December: 23.4 days

The month with the highest number of rainy days is December (23.4 days).
The month with the least rainy days is August (6.7 days).

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

Average daylight in December: 13h and 12min

The month with the longest days is December (Average daylight: 13h and 12min).
The month with the shortest days is June (Average daylight: 11h and 0min).

Average sunshine in December: 7h and 6min

The month with the most sunshine is September (Average sunshine: 8h and 6min).
The month with the least sunshine is November (Average sunshine: 6h and 30min).

Average sunshine days in December
Marilac, Brazil

Average sunshine days in December: 5 days

The month with the most sunshine days is August (21.3 days).
The month with the least sunshine days is December (5 days).

Average UV index in December
Marilac, Brazil

Average UV index in December: 6

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

Average cloud cover in December
Marilac, Brazil

Average cloud cover in December: 56

The month with the most cloud cover is November (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 37).

Average visibility in December
Marilac, Brazil

Average visibility in December: 7km

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