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Rosario Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Rosario.
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Climate overview of Rosario
Rosario, Colonia, Uruguay, sees big temperature differences between seasons, with January peaking at 30°C (86°F) and July dropping to 16°C (61°F).
The city has a wet climate, receiving around 1141 mm (45 in) of rainfall per year. Despite the high annual total, it has very warm summers and mild winters. February is the wettest month.
Rosario Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Rosario - and find the best time to visit.
Monthly Temperature in Rosario
Visitors to Rosario can expect significant temperature changes throughout the year. On average, daytime temperatures range from a very warm 30°C (86°F) in January to a moderate 16°C (61°F) in July.
Nighttime temperatures range from 19°C (66°F) in January to 7°C (45°F) in July.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Rosario
Rosario is known for its substantial rainfall, with annual precipitation reaching 1141 mm (45 in). The wettest period in Rosario occurs in February, which receives around 123 mm (4.8 in) of precipitation. During the driest month, July, Rosario experiences moderate rainfall, totaling 76 mm (3 in). The consistent precipitation levels throughout the year contribute to a relatively stable climate. For more details, please visit our Rosario Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Rosario
For comfortable weather, consider visiting Rosario in May, September and December. Conditions are usually least favourable in January, June and July.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
good
Feb
very good
Mar
very good
Apr
very good
May
excellent
Jun
good
Jul
good
Aug
very good
Sep
excellent
Oct
very good
Nov
very good
Dec
excellent
- Best overall: May, September and December
- Warmest weather: January, February and December
- Seasonal pattern: Very warm summers and mild winters
Frequently asked questions about the climate in Rosario
What is the best time to visit Rosario?
May, September and December typically offer the most optimal weather in Rosario. In contrast, January, June and July tend to have less optimal conditions. Rosario has very warm summers and mild winters.
What temperatures can I expect in Rosario?
Daytime highs range from 16°C (61°F) in July to 30°C (86°F) in January. Nighttime lows range from 7°C (45°F) to 19°C (66°F). Temperatures vary considerably through the year.
How much rain does Rosario get?
Annual rainfall is around 1141 mm (45 in). February is the wettest month with 123 mm (4.8 in), while July is the driest with 76 mm (3 in).
Rosario 3-Day Forecast
Rosario on the map
Rosario is highlighted - select any city to see its climate.
Popular in October
Where to go in October - average daytime high across popular destinations.
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