Rosario weather by month
Warmest month
May
32°C average high
Coolest month
February
22°C average low
Wettest month
July
171 mm of rain
Driest month
February
20 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 | 28°C | 23°C | 19°C / 32°C | 22 mm | 80% | 11 km/h |
| February | 29°C | 22°C | 18°C / 33°C | 20 mm | 77% | 11 km/h |
| March | 30°C | 23°C | 19°C / 35°C | 22 mm | 72% | 11 km/h |
| April | 32°C | 24°C | 19°C / 36°C | 36 mm | 70% | 10 km/h |
| May | 32°C | 25°C | 22°C / 36°C | 52 mm | 77% | 8 km/h |
| June | 32°C | 25°C | 23°C / 39°C | 79 mm | 83% | 7 km/h |
| July | 30°C | 24°C | 22°C / 34°C | 171 mm | 88% | 9 km/h |
| August | 30°C | 24°C | 21°C / 35°C | 104 mm | 87% | 10 km/h |
| September | 30°C | 24°C | 22°C / 34°C | 108 mm | 88% | 8 km/h |
| October | 30°C | 24°C | 21°C / 33°C | 97 mm | 86% | 8 km/h |
| November | 29°C | 24°C | 21°C / 34°C | 58 mm | 84% | 9 km/h |
| December | 28°C | 24°C | 19°C / 33°C | 74 mm | 83% | 10 km/h |
Frost and snow-likely months in Rosario
No month in Rosario averages a night of 2°C or below. The coldest month is February with an average low of 22°C and a record low of 18°C, so frost is rare and snow is very unlikely.
These records carry temperature and precipitation, not snowfall totals.
Best time to visit Rosario
The most comfortable time to visit Rosario is generally January to March, balancing mild daytime temperatures against the driest stretch of the year. Temperatures stay fairly even all year and rain concentrates around July, totalling about 844 mm a year.
Travellers who prefer heat should aim for May, when highs average 32°C. July is the month to avoid if rain would spoil your plans — it averages 171 mm, roughly 8× the rainfall of the driest month (February).
Rosario climate: your questions
Does it snow a lot in Rosario?
No: the coldest month in Rosario is February with an average low of 22°C and a record low of 18°C, so snow is very unlikely. What is falling now: Rosario weather today.
Which months are best for visiting Rosario?
January to March are the most comfortable months in Rosario, with highs near 29°C. May is the warmest month, averaging 32°C by day; July is the wettest, with 171 mm; and February is the coolest, with lows near 22°C. What it is doing today: Rosario weather today.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Rosario forecast for what is happening now.
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