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Rosario Weather by Month
Average temperatures, rainfall and humidity for Rosario, Argentina, month by month, built from OpenWeather’s historical records. Use it to see what a typical Rosario month looks like before you travel — then check the live Rosario forecast for the days ahead.
Warmest month
January
32°C average high
Coolest month
July
7°C average low
Wettest month
February
116 mm of rain
Driest month
July
17 mm of rain
Average temperature and rainfall in Rosario by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 32°C | 20°C | 10°C / 43°C | 62 mm | 62% | 12 km/h |
| February | 31°C | 19°C | 8°C / 44°C | 116 mm | 66% | 11 km/h |
| March | 28°C | 17°C | 6°C / 42°C | 69 mm | 70% | 11 km/h |
| April | 24°C | 14°C | 2°C / 36°C | 66 mm | 73% | 11 km/h |
| May | 20°C | 11°C | -1°C / 31°C | 38 mm | 74% | 11 km/h |
| June | 17°C | 8°C | -5°C / 28°C | 20 mm | 74% | 10 km/h |
| July | 17°C | 7°C | -8°C / 30°C | 17 mm | 73% | 11 km/h |
| August | 20°C | 8°C | -3°C / 31°C | 24 mm | 66% | 12 km/h |
| September | 22°C | 10°C | -1°C / 40°C | 40 mm | 65% | 13 km/h |
| October | 25°C | 13°C | 2°C / 38°C | 55 mm | 65% | 14 km/h |
| November | 28°C | 16°C | 6°C / 39°C | 76 mm | 61% | 14 km/h |
| December | 31°C | 18°C | 10°C / 44°C | 48 mm | 60% | 12 km/h |
Best time to visit Rosario
The most comfortable time to visit Rosario is generally April and September to October, balancing mild daytime temperatures against the driest stretch of the year. The city has a moderate seasonal swing and rain concentrates around February, totalling about 630 mm a year.
Travellers who prefer heat should aim for January, when highs average 32°C. February is the month to avoid if rain would spoil your plans — it averages 116 mm, roughly 7× the rainfall of the driest month (July).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Rosario forecast for what is happening now.