Rosario weather by month & the best time to visit

🇦🇷 Argentina · city break · humid subtropical climate

The best time to visit Rosario is September — its sunniest month (Sunshine Score 84/100), with May and April close behind. Rosario averages about 2,737 hours of sunshine a year. Daytime highs around 22°C / 72°F and roughly 58 mm of rain in September.

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Sun hours / year

2,737

Sunniest month

September

Peak score

84/100

Rain / year

1,090 mm

Midday UV at peak

11 (extreme)

Population

1.2M

Elevation

25 m

When is the best time to visit Rosario?

For sunshine, the best time to visit Rosario is September, then May and April. The dullest month is July (60/100, 26 mm of rain). The full month-by-month picture is in the table below.

How sunny is Rosario?

Rosario gets a lot of sun: around 2,737 hours a year. September (84/100) is noticeably better than July (60). It ranks #22 of 41 destinations in Argentina for annual sunshine, below the national median of 2,741 hours. The year's 1,090 mm of rain spreads fairly evenly across the months, with no pronounced dry season.

Sunshine Score by month

See Rosario on the interactive sunshine globe →

Nearby places for sunshine

• Buenos Aires (Ezeiza) Argentina · 298 km · best in Dec · 2,741 h sun/yr
• Cordoba Argentina · 368 km · best in Aug · 2,919 h sun/yr
• Montevideo Uruguay · 489 km · best in Dec · 2,791 h sun/yr
• Mendoza Argentina · 748 km · best in Sep · 3,504 h sun/yr
• Asunción Paraguay · 909 km · best in Aug · 2,552 h sun/yr
• Santiago Chile · 932 km · best in Mar · 3,263 h sun/yr

Nearest destinations

• Parana Argentina · 127 km · 2,782 h sun/yr · best in Sep
• Uruguaiana Brazil · 497 km · 2,625 h sun/yr · best in Aug
• San Luis Argentina · 521 km · 3,223 h sun/yr · best in Sep

Head-to-head

How Rosario compares month by month: Rosario vs Buenos Aires (Ezeiza) · Rosario vs Cordoba · Rosario vs Montevideo · all comparisons