Rosario Weather in December

December in Rosario brings very high temperatures, with highs of 30°C (86°F) and nights dropping to 18°C (64°F). Rainfall is on the higher side this month, averaging around 110 mm (4.3 in), so keep a rain jacket handy.

Rainfall in Rosario in December

Looking at the last 30 years, the data shows about 9 days with rain, averaging 110 mm (4.3 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in Rosario in December

Daytime temperatures in Rosario reach 30°C (86°F) in December, dropping to 18°C (64°F) at night. The hottest part of the day is usually in the afternoon, so lighter clothing can help you stay comfortable. With overnight lows of 18°C (64°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in Rosario in December

Expect a lot of sunshine this month, with about 279 hours of sun. These sunny conditions add to the overall experience.

Wind Speed in Rosario in December

In December, average wind speeds reach 4 m/s (8 knots), leading to light to moderate breezes. Conditions vary from day to day, with both calm and windier periods.

December in Rosario has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.