December weather forecast
Salto, Uruguay

Capping off the year in Salto, December defines the height of summer with its warm and humid conditions. Weather extremes mark the season, with temperatures soaring to a high of 30.2°C (86.4°F) and registering a peak UV index of 12, signaling the zenith of climatic conditions. Notably, the increased daylight, staying for as long as 14.2 hours a day, demonstrates the summer solstice's impact. Vivacity fills the December air, accompanied by longer sunny days. While the month represents the year-end festivities, it also reminds residents to ready themselves for the cooler months ahead.

Temperature

As November transitions into December, Salto notices a gentle rise in the average high-temperature, transitioning from a moderately hot 26.9°C (80.4°F) to a tropical 30.2°C (86.4°F). Salto sees a large disparity in day to night temperatures in December, with the night temperature dropping to an average of 17.1°C (62.8°F).

Heat index

December's average heat index is estimated at a tropical 34°C (93.2°F). Implement additional safety measures to avoid heat cramps and heat exhaustion. Persistent activity might trigger heatstroke.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is found by incorporating humidity levels into the air temperature measurement. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In December, the average relative humidity in Salto is 64%.

Rainfall

In Salto, during December, the rain falls for 5 days and regularly aggregates up to 120mm (4.72") of precipitation. In Salto, during the entire year, the rain falls for 60 days and collects up to 1324mm (52.13") of precipitation.

Daylight

December has the longest days of the year in Salto, with an average of 14h and 12min of daylight.
On the first day of December in Salto, sunrise is at 05:39 and sunset at 19:42. On the last day of the month, sunrise is at 05:50 and sunset at 19:59 -03.

Sunshine

December has the most sunshine of the year in Salto, with an average of 9.3h of sunshine.

UV index

January, February and December, with an average maximum UV index of 12, are months with the highest UV index. A UV Index estimate of 11, and higher, represents an ultimate health vulnerability from unsafe exposure to UV radiation for the average person.
Note: In December, a daily maximum UV index of 12 leads to the following instructions:
Take every essential safety procedure. Individuals with fair skin could sustain burns in less than 5 minutes. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Apply generously and frequently reapply a sunscreen with SPF 30 or more even on cloudy days, particularly after a swim or outdoor exercise.