Rosario weather in January
Temperature, rain and sunshine in January: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in January
Good
Best time to visit: February – June, August – December
What is the weather like in Rosario in January?
In January, Rosario is hot: daytime highs average 30 °C, and even at night it stays warm at around 20 °C. With around 10 hours of sunshine a day, there is plenty of sun. Rain falls on about 8 days, adding up to 96 mm. On about 17 days the thermometer climbs to 30 °C or more. All in all, January is a good month for a holiday in Rosario.
January compared
How the weather changes from December to February. Tap a month to open it.
| DecemberDec | JanuaryJan | FebruaryFeb | |
|---|---|---|---|
| Score | 78 | 71 | 78 |
| Day | 29° | 30° | 29° |
| Night | 19° | 20° | 19° |
| Sun | 9 h | 10 h | 9 h |
| Rain days | 8 | 8 | 9 |
More details for January
- Daylight
- 14 h 6 min06:08 – 20:14
- UV index
- 11 · extremeclear sky, noon (estimate)All months
- Muggy days
- 14 daysdew point 18 °C or moreAll months
- Wind
- 16 km/haverage daily peakAll months
- Cloud cover
- 37 %on averageAll months
- Hot days
- 17 days30 °C or moreAll months
- Time zone
- UTC−3America/Argentina/Cordoba
How the score comes together
- Temperatureweight 50 %59 %
- Sunshineweight 20 %100 %
- Few rainy daysweight 30 %71 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in January
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Rain jacket or umbrella
Rosario in January: quick answers
Is Rosario hot in January?
Yes. In January, Rosario is hot: daytime highs average 30 °C and nights stay around 20 °C. On about 17 days the thermometer climbs to 30 °C or more.
Does it rain much in Rosario in January?
Rain falls on about 8 days, adding up to 96 mm.
Rosario month by month
The whole year in RosarioAll destinations: ArgentinaWhere to go in January
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