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.
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
| Month | Score | Day high | Night low | Rain | UV |
|---|---|---|---|---|---|
| January | 65 | 33° / 91°F | 19° / 66°F | 123 mm | 11 |
| February | 70 | 31° / 88°F | 18° / 64°F | 139 mm | 10 |
| March | 68 | 28° / 82°F | 15° / 59°F | 148 mm | 8 |
| April | 75 | 24° / 75°F | 12° / 54°F | 111 mm | 5 |
| May | 78 | 19° / 66°F | 9° / 48°F | 52 mm | 3 |
| June | 61 | 16° / 61°F | 5° / 41°F | 22 mm | 2 |
| July | 60 | 16° / 61°F | 4° / 39°F | 26 mm | 2 |
| August | 73 | 18° / 64°F | 6° / 43°F | 38 mm | 4 |
| September | 84 | 22° / 72°F | 8° / 46°F | 58 mm | 5 |
| October | 73 | 25° / 77°F | 12° / 54°F | 122 mm | 8 |
| November | 75 | 29° / 84°F | 15° / 59°F | 109 mm | 10 |
| December | 69 | 32° / 90°F | 17° / 63°F | 142 mm | 11 |
Nearest destinations
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Head-to-head
How Rosario compares month by month: Rosario vs Buenos Aires (Ezeiza) · Rosario vs Cordoba · Rosario vs Montevideo · all comparisons
Rosario: questions and answers
What kind of destination is Rosario?
Rosario is a city break in Argentina with a humid subtropical climate.
How many hours of sunshine does Rosario get a year?
Rosario gets about 2,737 hours of sunshine a year, at its best around September.
When is the best time to visit Rosario?
The sunniest time to visit Rosario is September, when the Sunshine Score peaks at 84/100 (with May and April close behind). Expect daytime highs around 22°C / 72°F.
What is the least sunny month in Rosario?
July is the least sunny month in Rosario, scoring 60/100 with about 26 mm of rain.
How strong is the sun in Rosario?
The typical midday UV index in Rosario peaks around 11 (extreme) in January, easing to about 2 (low) in June. Month-by-month midday UV values are in the UV column of the table on this page.
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