December weather forecastMorretes, Brazil

December

Weather in December

December, the first month of the summer in Morretes, is still a warm month, with an average temperature varying between 20.2°C (68.4°F) and 28.5°C (83.3°F).

Temperature

With the start of December, Morretes measures an average high-temperature of a still warm 28.5°C (83.3°F), not significantly differing from November's 26.2°C (79.2°F). Morretes records an average nighttime low of 20.2°C (68.4°F) in December.

Heat index

In December, the heat index is computed to be a hot 34°C (93.2°F). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.
It is emphasized that the heat index's values are meant for shaded zones with mild winds. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', integrates the air's temperature and its humidity to showcase the felt temperature by people. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.

Humidity

January, February and December, with an average relative humidity of 82%, are the least humid months.

Rainfall

In Morretes, during December, the rain falls for 21.6 days and regularly aggregates up to 107mm (4.21") of precipitation. Throughout the year, there are 204.4 rainfall days, and 1031mm (40.59") of precipitation is accumulated.

Daylight

With an average of 13h and 42min of daylight, December has the longest days of the year in Morretes, Brazil.
On the first day of the month, sunrise is at 05:16 and sunset at 18:53. On the last day of December, in Morretes, sunrise is at 05:27 and sunset at 19:09 -03.

Sunshine

In December, the average sunshine in Morretes is 6.6h.

UV index

January through March, November and December, with an average maximum UV index of 6, are months with the highest UV index in Morretes. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: The UV index of 6 in December translates into these instructions:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. 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. To cut down UV radiation exposure by about half, sport a wide-brim hat.

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

Frequently asked questions

The high-temperature, in December, in Morretes, is 28.5°C (83.3°F), while the low-temperature averages to 20.2°C (68.4°F). The average heat index (a.k.a. 'real feel', 'feels like'), which combines relative humidity and air temperature, in December is computed to be 34°C (93.2°F).

January, February and December, with an average relative humidity of 82%, are the least humid months in Morretes, Brazil.

In December, the average relative humidity is 82%.

In Morretes, Brazil, in December, during 21.6 rainfall days, 107mm (4.21") of precipitation is typically accumulated.

With an average of 13h and 42min of daylight, December has the longest days of the year in Morretes, Brazil.

The average day length in December in Morretes is 13h and 42min.

On the first day of December in Morretes, Brazil, sunrise is at 05:16 and sunset at 18:53. On the last day of the month, sunrise is at 05:27 and sunset at 19:09 -03.

In Morretes, the average sunshine duration in December is 6.6h.

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

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

26.2°C

28.5°C

29.4°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

7.9km/h

7.7km/h

7.8km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

8.9

6.9

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Morretes, Brazil

Average high temperature in December: 28.5°C

The warmest month (with the highest average high temperature) is January (29.4°C).
The month with the lowest average high temperature is July (21.3°C).

Average low temperature in December: 20.2°C

The month with the highest average low temperature is January (21.3°C).
The coldest month (with the lowest average low temperature) is July (14.1°C).

Average pressure in December
Morretes, Brazil

Average pressure in December: 1011.9mbar

The month with the highest atmospheric pressure is July (1020.2mbar).
The month with the lowest atmospheric pressure is December (1011.9mbar).

Average wind speed in December
Morretes, Brazil

Average wind speed in December: 6.7km/h

The windiest month (with the highest average wind speed) is November (7km/h).
The calmest months (with the lowest average wind speed) are June, July and August (5.9km/h).

Average humidity in December
Morretes, Brazil

Average humidity in December: 82%

The months with the highest relative humidity are May, June and July (85%).
The months with the lowest relative humidity are January, February and December (82%).

Average rainfall in December
Morretes, Brazil

Average rainfall in December: 107mm

The wettest month (with the highest rainfall) is February (141mm).
The driest months (with the least rainfall) are April and August (56mm).

Average rainfall days in December
Morretes, Brazil

Average rainfall days in December: 21.6 days

The month with the highest number of rainy days is January (23.3 days).
The month with the least rainy days is August (11.6 days).

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

Average daylight in December: 13h and 42min

The month with the longest days is December (Average daylight: 13h and 42min).
The month with the shortest days is June (Average daylight: 10h and 36min).

Average sunshine in December: 6h and 36min

The months with the most sunshine are January, April and August (Average sunshine: 6h and 54min).
The months with the least sunshine are October and November (Average sunshine: 6h and 6min).

Average sunshine days in December
Morretes, Brazil

Average sunshine days in December: 6.9 days

The month with the most sunshine days is July (17.3 days).
The month with the least sunshine days is January (5 days).

Average UV index in December
Morretes, Brazil

Average UV index in December: 6

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

Average cloud cover in December
Morretes, Brazil

Average cloud cover in December: 58

The months with the most cloud cover are October and November (Cloud cover 62).
The months with the least cloud cover are July and August (Cloud cover 49).

Average visibility in December
Morretes, Brazil

Average visibility in December: 8km

The months with the highest visibility are January, February, March, April, May, June, August, September and December (8km).
The months with the lowest visibility are July, October and November (7km).