Monthly climate guide
Mar del Plata weather in September
September in Mar del Plata is typically cool, with average daytime highs around 14°C (56°F) and night-time lows near 8°C (46°F). The month usually brings about 79 mm of rain (some rain) and is often cloudy. Daytime highs are about the same as August and 2°C cooler than October.
What stands out in September
- September brings early spring to Mar del Plata — the seasons are reversed south of the equator.
- There's little difference between day and night (around 6°C).
- Just 340 km apart, but Mar del Plata runs about 5°C cooler than La Plata this month.
Avg high
14°C
56°F
Avg low
8°C
46°F
Rainfall
79 mm
some rain
Humidity
82%
relative
Sky
58%
cloud · often cloudy
Mar del Plata weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 24°C / 76°F | 17°C / 62°F | 137 mm | 72% | 47% |
| February | 24°C / 76°F | 17°C / 63°F | 126 mm | 74% | 50% |
| March | 22°C / 72°F | 16°C / 60°F | 104 mm | 76% | 51% |
| April | 19°C / 66°F | 13°C / 56°F | 126 mm | 79% | 58% |
| May | 15°C / 60°F | 11°C / 51°F | 89 mm | 83% | 63% |
| June | 12°C / 54°F | 7°C / 45°F | 68 mm | 84% | 61% |
| July | 11°C / 52°F | 6°C / 43°F | 70 mm | 85% | 63% |
| August | 12°C / 54°F | 7°C / 44°F | 83 mm | 85% | 59% |
| September | 14°C / 56°F | 8°C / 46°F | 79 mm | 82% | 58% |
| October | 16°C / 60°F | 9°C / 49°F | 104 mm | 82% | 60% |
| November | 20°C / 67°F | 12°C / 54°F | 107 mm | 77% | 50% |
| December | 23°C / 74°F | 15°C / 59°F | 131 mm | 72% | 45% |
What to pack for September
- A warm sweater or fleece for layering
- A mid-weight jacket
- A compact umbrella or packable rain jacket
- Water-resistant shoes
Is September a good time to visit Mar del Plata?
Compare the months in the chart above to find your ideal window.
Best time to visit Mar del Plata →Other Argentina cities in September
Cite or embed this data
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Mar del Plata weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/argentina/mar-del-plata/september
<a href="https://weathercompare.eu/weather/argentina/mar-del-plata/september">Mar del Plata weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/argentina/mar-del-plata" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Mar del Plata weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/argentina/mar-del-plata/september">Mar del Plata weather in September</a> – WeatherCompare</p>
Mar del Plata in September: quick answers
Is September a good time to visit Mar del Plata?
September is a reasonable time for Mar del Plata: highs around 14°C and about 79 mm of rain, though not one of the three best months.
How warm is Mar del Plata in September?
Average highs are about 14°C (56°F) and average lows about 8°C (46°F), based on 10 years of daily data.
Does it rain a lot in Mar del Plata in September?
Mar del Plata typically gets around 79 mm of rain in September — some rain.
Figures are long-term averages for the area around Mar del Plata (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.