Monthly climate guide
Merlo weather in January
January in Merlo is typically hot, with average daytime highs around 31°C (89°F) and night-time lows near 18°C (65°F). The month usually brings about 100 mm of rain (wet) and is a mix of sun and cloud. Daytime highs are about the same as December and 2°C warmer than February.
What stands out in January
- Afternoons and nights feel like different seasons, roughly 13°C apart.
- January brings mid-summer to Merlo — the seasons are reversed south of the equator.
- Just 30 km apart, but Merlo runs about 4°C warmer than Buenos Aires this month.
January is typically Merlo's warmest month.
Avg high
31°C
89°F
Avg low
18°C
65°F
Rainfall
100 mm
wet
Humidity
64%
relative
Sky
44%
cloud · a mix of sun and cloud
Merlo weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 31°C / 89°F | 18°C / 65°F | 100 mm | 64% | 44% |
| February | 30°C / 86°F | 18°C / 64°F | 114 mm | 68% | 45% |
| March | 27°C / 81°F | 15°C / 59°F | 89 mm | 70% | 40% |
| April | 24°C / 74°F | 12°C / 54°F | 111 mm | 76% | 50% |
| May | 19°C / 66°F | 9°C / 48°F | 81 mm | 82% | 57% |
| June | 16°C / 61°F | 5°C / 42°F | 49 mm | 82% | 54% |
| July | 15°C / 59°F | 5°C / 40°F | 77 mm | 82% | 58% |
| August | 18°C / 64°F | 6°C / 43°F | 78 mm | 79% | 53% |
| September | 20°C / 68°F | 8°C / 46°F | 92 mm | 76% | 51% |
| October | 22°C / 72°F | 11°C / 51°F | 117 mm | 76% | 56% |
| November | 27°C / 80°F | 14°C / 57°F | 110 mm | 69% | 45% |
| December | 30°C / 86°F | 16°C / 62°F | 102 mm | 62% | 42% |
What to pack for January
- Light, breathable clothing (cotton or linen)
- A sun hat and high-SPF sunscreen
- A refillable water bottle
- An extra layer — evenings are noticeably cooler than afternoons
- A compact umbrella or packable rain jacket
- Water-resistant shoes
Is January a good time to visit Merlo?
Compare the months in the chart above to find your ideal window.
Best time to visit Merlo →Other Argentina cities in January
Cite or embed this data
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Merlo weather in January. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/argentina/merlo/january
<a href="https://weathercompare.eu/weather/argentina/merlo/january">Merlo weather in January</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/argentina/merlo" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Merlo weather in January"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/argentina/merlo/january">Merlo weather in January</a> – WeatherCompare</p>
Merlo in January: quick answers
Is January a good time to visit Merlo?
It can be, if you like heat: January highs in Merlo are around 31°C. Good for the beach; plan sightseeing for early morning and evening.
How warm is Merlo in January?
Average highs are about 31°C (89°F) and average lows about 18°C (65°F), based on 10 years of daily data.
Does it rain a lot in Merlo in January?
Merlo typically gets around 100 mm of rain in January — wet.
Figures are long-term averages for the area around Merlo (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.