nomadseason

December Weather in Mercedes, Uruguay

Last updated: August 28, 2025

In December, the average temperature in Mercedes, Uruguay hovers around 23°C (74°F). Visitors can expect a range of temperatures, with minimums dipping to 8°C (47°F) and maximums soaring to 38°C (100°F). During this month, precipitation averages 96 mm (3.8 in) across 6 days, contributing to an average humidity of 63%.

December Temperature in Mercedes

In December in Mercedes, the average temperature is 23°C (74°F). Maximum temperatures can reach 38°C (100°F), while minimums can drop as low as 8°C (47°F). Be prepared for a wide range of temperatures and pack accordingly for your travels!

December Weather in Mercedes: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Mercedes, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mercedes, December typically has an average temperature of 23°C (74°F), with highs reaching up to 38°C (100°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec777471665854525559637074
Data source: Temperature data for Mercedes generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Mercedes

In Mercedes, in December, the precipitation amount is 96 mm (3.8 in) occurring over the course of 6 days.

December Precipitation Trends in Mercedes

The chart displays monthly precipitation patterns in Mercedes, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Mercedes, December typically receives around 96 mm (3.8 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec110107103959271698798976196
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Mercedes

In Mercedes in December, humidity is 63%. With an average temperature of 23°C (74°F), this humidity feels like a warm embrace, making it quite comfortable for traveling, yet reminding you to stay hydrated as you explore.

December Average Humidity in Mercedes

This chart illustrates the average monthly humidity levels in Mercedes, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Mercedes is approximately 63%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec54%61%69%79%85%82%69%65%70%63%61%63%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Mercedes

In Mercedes in December, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Mercedes, you can check here.

Maximum UV Index Levels in Mercedes for December

The chart shows the monthly maximum UV Index (UVI) for Mercedes in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Mercedes typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151311854468111314
Data source: Mercedes December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Mercedes Compares to Other Months

Weather in Mercedes varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Mercedes, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Mercedes, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (77°F)110 mm (4.3 inches)54%extreme
February Weather24°C (75°F)107 mm (4.2 inches)61%extreme
March Weather21°C (71°F)103 mm (4.1 inches)69%extreme
April Weather19°C (66°F)95 mm (3.7 inches)79%very high
May Weather15°C (58°F)92 mm (3.6 inches)85%moderate
June Weather12°C (54°F)71 mm (2.8 inches)82%moderate
July Weather11°C (52°F)68 mm (2.7 inches)69%moderate
August Weather13°C (55°F)87 mm (3.4 inches)65%high
September Weather15°C (60°F)98 mm (3.9 inches)70%very high
October Weather17°C (64°F)97 mm (3.8 inches)63%extreme
November Weather21°C (71°F)61 mm (2.4 inches)60%extreme
December Weather23°C (74°F)96 mm (3.8 inches)63%extreme

Compare Mercedes's Climate with Cities Worldwide