Monthly climate guide
Rosario weather in August
August in Rosario is typically mild, with average daytime highs around 19°C (67°F) and night-time lows near 7°C (44°F). The month usually brings about 42 mm of rain (fairly dry) and is a mix of sun and cloud. Daytime highs are 3°C warmer than July and 3°C cooler than September.
What stands out in August
- In Rosario, August is late winter — the seasons are reversed south of the equator.
- Rosario is usually about 2°C warmer than Merlo, 260 km away, in August.
- August is among Rosario's three coolest months.
- Afternoons and nights feel like different seasons, roughly 13°C apart.
Avg high
19°C
67°F
Avg low
7°C
44°F
Rainfall
42 mm
fairly dry
Humidity
74%
relative
Sky
44%
cloud · a mix of sun and cloud
Rosario weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 33°C / 91°F | 19°C / 66°F | 125 mm | 61% | 47% |
| February | 31°C / 88°F | 18°C / 65°F | 143 mm | 67% | 53% |
| March | 28°C / 83°F | 15°C / 59°F | 105 mm | 69% | 42% |
| April | 25°C / 76°F | 13°C / 55°F | 116 mm | 75% | 49% |
| May | 20°C / 68°F | 10°C / 49°F | 67 mm | 81% | 56% |
| June | 17°C / 63°F | 6°C / 42°F | 24 mm | 79% | 49% |
| July | 16°C / 61°F | 5°C / 41°F | 26 mm | 78% | 53% |
| August | 19°C / 67°F | 7°C / 44°F | 42 mm | 74% | 44% |
| September | 22°C / 72°F | 9°C / 48°F | 56 mm | 70% | 46% |
| October | 25°C / 77°F | 12°C / 53°F | 133 mm | 69% | 53% |
| November | 29°C / 84°F | 15°C / 59°F | 119 mm | 64% | 45% |
| December | 32°C / 89°F | 17°C / 63°F | 128 mm | 59% | 46% |
What to pack for August
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- An extra layer — evenings are noticeably cooler than afternoons
- A small travel umbrella, just in case
Is August a good time to visit Rosario?
Compare the months in the chart above to find your ideal window.
Best time to visit Rosario →Other Argentina cities in August
Cite or embed this data
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Rosario weather in August. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/argentina/rosario/august
<a href="https://weathercompare.eu/weather/argentina/rosario/august">Rosario weather in August</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/argentina/rosario" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Rosario weather in August"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/argentina/rosario/august">Rosario weather in August</a> – WeatherCompare</p>
Rosario in August: quick answers
Is August a good time to visit Rosario?
Yes. August is one of the best months for Rosario, with highs around 19°C and about 42 mm of rain.
How warm is Rosario in August?
Average highs are about 19°C (67°F) and average lows about 7°C (44°F), based on 10 years of daily data.
Does it rain a lot in Rosario in August?
Rosario typically gets around 42 mm of rain in August — fairly dry.
Figures are long-term averages for the area around Rosario (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.