Rosario weather in December
Temperature, rain and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Good
Best time to visit: February – June, August – December
What is the weather like in Rosario in December?
In December, Rosario is hot: daytime highs average 29 °C, and nights cool down to about 19 °C. With around 9 hours of sunshine a day, there is plenty of sun. Rain falls on about 8 days, adding up to 97 mm. On about 12 days the thermometer climbs to 30 °C or more. All in all, December is a good month for a holiday in Rosario.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 91 | 78 | 71 |
| Day | 27° | 29° | 30° |
| Night | 16° | 19° | 20° |
| Sun | 9 h | 9 h | 10 h |
| Rain days | 8 | 8 | 8 |
More details for December
- Daylight
- 14 h 18 min05:49 – 20:07
- UV index
- 11 · extremeclear sky, noon (estimate)All months
- Muggy days
- 7 daysdew point 18 °C or moreAll months
- Wind
- 17 km/haverage daily peakAll months
- Cloud cover
- 39 %on averageAll months
- Hot days
- 12 days30 °C or moreAll months
- Time zone
- UTC−3America/Argentina/Cordoba
How the score comes together
- Temperatureweight 50 %75 %
- Sunshineweight 20 %100 %
- Few rainy daysweight 30 %69 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in December
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Rain jacket or umbrella
Rosario in December: quick answers
Is Rosario hot in December?
Yes. In December, Rosario is hot: daytime highs average 29 °C and nights stay around 19 °C. On about 12 days the thermometer climbs to 30 °C or more.
Does it rain much in Rosario in December?
Rain falls on about 8 days, adding up to 97 mm.
Rosario month by month
The whole year in RosarioAll destinations: ArgentinaWhere to go in December
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences