Mercedes Weather in December

December in Mercedes typically sees daytime highs of 31°C (88°F) and nighttime lows of 18°C (64°F). Rainfall is also possible this month, so it's worth packing an umbrella.

Rainfall in Mercedes in December

Historically, December sees about of rain, with a monthly average of 139 mm (5.5 in).

Temperature in Mercedes in December

Expect highs of 31°C (88°F) in Mercedes in December, with nights dropping to around 18°C (64°F). For most visitors, the main thing to prepare for is the heat during the day. Nights drop to around 18°C (64°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in Mercedes in December

The city usually sees around 291 hours of sunlight, indicating many sunny days — a great month for sightseeing.

If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit Mercedes. Our weather planner can help you explore destinations with more pleasant weather conditions.

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For a detailed overview over the year and the best time to visit Argentina, check out our Mercedes's climate page.

Mercedes Temperature in December

Min Temperature 18°C (64°F)  

Max Temperature 31°C (88°F)  

Precipitation 139 mm (5.5 in)  

Humidity 62%  

Sunshine 291 hours  

Percentage Sunshine  

Historical weather for Mercedes in December

Browse day-by-day weather records for Mercedes spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

‹ 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 ›

‹ January February March April May June July August September October November December ›

Mercedes historical weather extremes in December

Based on 19 years of weather observations (2006-2025), these are the most extreme conditions recorded in Mercedes.

• On December 9, 2022, temperatures climbed to 40°C (104°F), marking the warmest December day on record.
• Mercedes experienced its chilliest December day on December 12, 2010, reaching only 20°C (68°F).
• The coldest night in December in Mercedes was on December 3, 2018, with a minimum of 11°C (52°F).

What to Wear in Mercedes in December

Warm but pleasant conditions in Mercedes in December. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Expect heavy rainfall, so bring good rain protection and waterproof bags. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Mercedes in December

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Argentina, check out our Mercedes's climate page.

More climate data for Mercedes

Temperature Rainfall Sunshine Humidity

See the full Mercedes climate overview or explore weather in Argentina.