Gualeguaychú Weather in December
December in Gualeguaychú sees daytime temperatures around 30°C (86°F) and lows of 18°C (64°F) at night. With around 130 mm (5.1 in) of rainfall expected, it's worth packing a rain jacket.
Rainfall in Gualeguaychú in December
Based on our climate data of the past 30 years, about 8 days of rain are anticipated, with 130 mm (5.1 in) on average. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.
Temperature in Gualeguaychú in December
In December, expect very high temperatures in Gualeguaychú, with highs of 30°C (86°F) and lows of 18°C (64°F) at night. Indoor breaks or shaded spots can make the warmer part of the day much more comfortable. 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 Gualeguaychú in December
There are approximately 280 hours of sunshine this month, resulting in mostly clear days.Our weather planner can help you find worldwide destinations with pleasant weather during this period. May, August and September typically offer the best weather for Gualeguaychú.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Argentina, check out our Gualeguaychú's climate page.
Gualeguaychú Temperature in December
Min Temperature
18°C (64°F)
Max Temperature
30°C (86°F)
Chance of Rain
27%
Precipitation
130 mm (5.1 in)
Rainy days
8 days
Humidity
63% *
Sunshine
280 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Gualeguaychú typically rise from around 28°C (82°F) at the start of December to approximately 31°C (88°F) by the end. Nights are pleasant, with lows typically ranging from 16°C (61°F) to 19°C (66°F).
Average temperatures in December
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather for Gualeguaychú in December
Browse day-by-day weather records for Gualeguaychú spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Gualeguaychú historical weather extremes in December
Our historical data for Gualeguaychú spans 1976 to 2025, revealing these weather extremes.
- Gualeguaychú recorded its highest December temperature of 41°C (106°F) on December 26, 2013.
- On December 3, 2001, Gualeguaychú saw its coldest December day with temperatures maxing out at 17°C (63°F).
- Gualeguaychú registered its coldest December night on December 7, 2018, with temperatures dropping to 6°C (43°F).
Best Places in Argentina in December
Find out more about the weather in Argentina and which places have the best travel conditions in this month. See all of Argentina in December →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Gualeguaychú in December
Warm but pleasant conditions in Gualeguaychú 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. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Gualeguaychú in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Argentina, check out our Gualeguaychú's climate page.
Temperature Rainfall Sunshine Humidity
See the full Gualeguaychú climate overview or explore weather in Argentina.
