December weather forecastMasoller, Uruguay

December

Weather in December

The first month of the summer, December, is still a warm month in Masoller, Uruguay, with temperature in the range of an average high of 29.4°C (84.9°F) and an average low of 17°C (62.6°F).

Temperature

December denotes a minimal variation in the average high-temperature to a still warm 29.4°C (84.9°F) from November's 26.9°C (80.4°F). Masoller registers a significant drop in temperature in December, with average nighttime lows of 17°C (62.6°F).

Heat index

In December, the average heat index is computed to be a tropical 33°C (91.4°F). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
One should consider that heat index numbers are for shaded settings and light wind. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is found by incorporating humidity levels into the air temperature measurement. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly relevant to children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.

Humidity

December is the least humid month, with an average relative humidity of 66%.

Rainfall

In Masoller, in December, it is raining for 12.4 days, with typically 84mm (3.31") of accumulated precipitation. In Masoller, during the entire year, the rain falls for 133.2 days and collects up to 920mm (36.22") of precipitation.

Daylight

The month with the longest days is December, with an average of 14h and 6min of daylight.
On the first day of the month, sunrise is at 05:32 and sunset at 19:33. On the last day of December, sunrise is at 05:43 and sunset at 19:51 -03.

Sunshine

December has the most sunshine of the year in Masoller, Uruguay, with an average of 10.2h of sunshine.

UV index

The months with the highest UV index are January through March, November and December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.
Note: In December, the maximum UV index of 6 transforms into these recommendations:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays.

Updated: Jun 4, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

An average high-temperature, in December, in Masoller, is 29.4°C (84.9°F) and the average low-temperature is 17°C (62.6°F). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, in December is computed to be 33°C (91.4°F).

December is the least humid month, with an average relative humidity of 66%.

The average relative humidity in December is 66%.

In Masoller, during December, the rain falls for 12.4 days and regularly aggregates up to 84mm (3.31") of precipitation.

December has the longest days of the year, with an average of 14h and 6min of daylight.

The average day length in December is 14h and 8min.

On the first day of December, sunrise is at 05:32 and sunset at 19:33. On the last day of the month, sunrise is at 05:43 and sunset at 19:51 -03.

The month with the most sunshine is December, with an average of 10.2h of sunshine.

In December, the average sunshine duration is 10.2h.

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

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

26.9°C

29.4°C

30.5°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

15.3km/h

14.4km/h

14.2km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

18.5

17.5

16.6

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Masoller, Uruguay

Average high temperature in December: 29.4°C

The warmest month (with the highest average high temperature) is January (30.5°C).
The month with the lowest average high temperature is July (16.5°C).

Average low temperature in December: 17°C

The month with the highest average low temperature is January (18.5°C).
The coldest month (with the lowest average low temperature) is July (8°C).

Average pressure in December
Masoller, Uruguay

Average pressure in December: 1010.2mbar

The month with the highest atmospheric pressure is July (1019mbar).
The month with the lowest atmospheric pressure is December (1010.2mbar).

Average wind speed in December
Masoller, Uruguay

Average wind speed in December: 13.6km/h

The windiest month (with the highest average wind speed) is September (15.2km/h).
The calmest month (with the lowest average wind speed) is April (12.3km/h).

Average humidity in December
Masoller, Uruguay

Average humidity in December: 66%

The months with the highest relative humidity are May and June (83%).
The month with the lowest relative humidity is December (66%).

Average rainfall in December
Masoller, Uruguay

Average rainfall in December: 84mm

The wettest months (with the highest rainfall) are May and November (98mm).
The driest month (with the least rainfall) is August (57mm).

Average rainfall days in December
Masoller, Uruguay

Average rainfall days in December: 12.4 days

The month with the highest number of rainy days is January (12.6 days).
The month with the least rainy days is August (9.3 days).

Average daylight in December /
Average sunshine in December
Masoller, Uruguay

Average daylight in December: 14h and 6min

The month with the longest days is December (Average daylight: 14h and 6min).
The month with the shortest days is June (Average daylight: 10h and 12min).

Average sunshine in December: 10h and 12min

The month with the most sunshine is December (Average sunshine: 10h and 12min).
The month with the least sunshine is June (Average sunshine: 5h and 18min).

Average sunshine days in December
Masoller, Uruguay

Average sunshine days in December: 17.5 days

The month with the most sunshine days is August (20.3 days).
The month with the least sunshine days is February (15.1 days).

Average UV index in December
Masoller, Uruguay

Average UV index in December: 6

The months with the highest UV index are January, February, March, November and December (UV index 6).
The month with the lowest UV index is May (UV index 3).

Average cloud cover in December
Masoller, Uruguay

Average cloud cover in December: 28

The month with the most cloud cover is May (Cloud cover 43).
The month with the least cloud cover is December (Cloud cover 28).

Average visibility in December
Masoller, Uruguay

Average visibility in December: 9km

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