December weather forecast
Rivera, Uruguay

December in Rivera is a gateway to the hot season. The mercury touches a high of 29.4°C (84.9°F), intensifying the summer conditions. Despite the heat, Rivera is blessed with about 14.1 hours of daylight making days longer. December ushers in the Christmas celebrations under the glaring Uruguayan sun. The weather bidding adieu to the year sets an anticipated prelude to another cycle of Rivera's dynamic weather pattern commencing from January.

Temperature

Rivera's weather, upon December's arrival, documents an average high-temperature of a still warm 29.4°C (84.9°F), nearly identical to the prior month. Rivera anticipates a pronounced temperature drop from daily highs during the nights of December, with an average low of 17°C (62.6°F).

Heat index

December's heat index is computed to be a tropical 33°C (91.4°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Be informed that the heat index values are oriented around shady conditions and gentle 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 'real feel', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.

Humidity

With an average relative humidity of 66%, December is the least humid month in Rivera.

Rainfall

In December, in Rivera, the rain falls for 12.4 days. Throughout December, 84mm (3.31") of precipitation is accumulated. Throughout the year, in Rivera, there are 133.2 rainfall days, and 920mm (36.22") of precipitation is accumulated.

Daylight

December has the longest days of the year in Rivera, Uruguay, with an average of 14h and 6min of daylight.
On the first day of the month, sunrise is at 05:31 and sunset at 19:31. On the last day of December, sunrise is at 05:42 and sunset at 19:48 -03.

Sunshine

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

UV index

January through March, November and December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: The maximum UV index, 6 during December, leads to the following recommendations:
Deflect overexposure. Sun protection is a necessity. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Opt for tightly woven and loose clothing to enhance protection from the Sun.