Rosario Weather in December
In December, Rosario averages a high of 31°C (87°F) and a low of 17°C (63°F), based on 54 years of historical weather data from ROSARIO.
31°C
Average high
87°F
17°C
Average low
63°F
41°C
Record high
105°F · 1983
4°C
Record low
39°F · 1971
What to Expect in Rosario in December
Typical December days in Rosario reach 31°C (87°F) during the afternoon and cool to around 17°C (63°F) overnight. On average, measurable rain falls on about 43% of days this month. Over the past 54 years, December temperatures in Rosario have ranged from a record high of 41°C (1983) down to a record low of 4°C (1971).
For a day-by-day look or other months, see the full Rosario weather history.