Rosario, Argentina Climate by Month
Rosario, Santa Fe, Argentina
Hot summers and mild winters, with rain spread through the year.
The climate in Rosario is one of hot summers and mild winters, with rain spread through the year. Afternoon highs range from 61°F (16°C) in July to 87°F (31°C) in January, and July nights average 42°F (6°C). About 40 in (1013 mm) of rain falls in a typical year, with no clear rainy season.
- Warmest month
- 87°F(31°C)
- Average high, January
- Coldest nights
- 42°F(6°C)
- Average low, July
- Rain per year
- 40 in(1013 mm)
- No clear rainy season
- Humidity
- 71%
- Sunniest: January
Best and worst months in Rosario
Best for weatherApril, September and October are the best time for weather in Rosario: highs near 73°F (23°C) and about 3.5 in (90 mm) of rain a month.
Least pleasantJanuary and June are the least pleasant; January is the hottest, with highs of 87°F (31°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in October.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Rosario weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 87°F(31°C) | 65°F(19°C) | 4.3 in(110 mm) | 64% | 6.7 |
| FebFebruary | 85°F(30°C) | 64°F(18°C) | 4.5 in(114 mm) | 69% | 6.2 |
| MarMarch | 81°F(27°C) | 60°F(16°C) | 5.4 in(138 mm) | 71% | 5.3 |
| AprAprilBest | 74°F(23°C) | 54°F(12°C) | 4.5 in(115 mm) | 74% | 4.0 |
| MayMay | 67°F(20°C) | 49°F(9°C) | 2.4 in(62 mm) | 79% | 2.8 |
| JunJune | 62°F(17°C) | 44°F(7°C) | 1.5 in(38 mm) | 81% | 2.2 |
| JulJuly | 61°F(16°C) | 42°F(6°C) | 1.1 in(27 mm) | 78% | 2.6 |
| AugAugust | 65°F(18°C) | 44°F(7°C) | 1.6 in(40 mm) | 69% | 3.4 |
| SepSeptemberBest | 70°F(21°C) | 48°F(9°C) | 2.2 in(57 mm) | 65% | 4.4 |
| OctOctoberBest | 74°F(24°C) | 54°F(12°C) | 3.8 in(97 mm) | 69% | 5.3 |
| NovNovember | 81°F(27°C) | 59°F(15°C) | 4.1 in(105 mm) | 64% | 6.5 |
| DecDecember | 85°F(30°C) | 63°F(17°C) | 4.3 in(110 mm) | 63% | 6.7 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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