Last and first frost dates in Posadas

When is the last frost in Posadas?

The last frost in Posadas usually comes around 18 July: that is the median of 2016–2025, so in about half of those years the last night at or below 0 °C came later. Hardy crops start before it and frost-tender ones only after it: in the table below arugula can go into open ground from 27 June, while corn waits until 25 July.

When to sow and plant

Planting out: a week after the last frost once the soil is warm enough for the crop; frost-hardy crops three weeks before it; an unheated greenhouse three weeks earlier. Seedlings are sown so they are ready on that day. Each window starts on the Greenly calendar date and ends on the last day that still leaves the crop’s days to harvest (from its card) before the average first autumn frost, plus six weeks of picking for crops harvested over weeks (tomatoes, peppers, aubergines, cucumbers, courgettes, pumpkins, watermelons, beans) — our rule; earlier in the window is safer.

When the soil warms up in Posadas

The day the top 7 cm of soil first averages each temperature over a week, median of 2016–2025 (ERA5 via Open-Meteo).

Frost dates near Posadas

Seeds, seedlings and markets in Posadas

Within 15 km of Posadas OpenStreetMap lists 8 garden centres, 1 farm-supply shop, 3 plant nurseries and 24 markets (collected 27 October 2026). The nearest garden centre to the city centre is Vivero los Arandanos, 1 km away.

• Vivero los Arandanos — garden centre
  Avenida Santa Cruz, 3300 Posadas · 1 km
• Agropecuaria del Paraná SA — farm supply · sells seed
  Avenida Uruguay 4908, N3300MOX Posadas · 2 km
• Vivero El Triunfo — plant nursery
  Florentino Ameghino, 3300 Posadas · 2 km
• Mercado Concentrador — market
  Avenida Aguado 4450, N3300 Posadas · Mon–Sat 07:00–13:00 · 1 km · mercadoconcentrador.gob.ar
• Vivero Fenix — garden centre
  Avenida Quaranta 5373, 3300 Posadas · 2 km
• Vivero Municipal — plant nursery
  Mon–Fri 07:00–17:00 · 3 km

• Where to buy seeds and seedlings in Posadas
• Selling your own harvest in Argentina

Places: © OpenStreetMap contributors, ODbL.

Weather in Posadas by month

Average weather in Posadas over 2016–2025: the warmest month is January. Months that average 20 °C or more by day: January–December (20.5–31.8 °C). Months that average 30 °C or more by day: January (31.8 °C), February (31.4 °C) and December (30.7 °C). No month averages below 0 °C at night; the coldest nights, in July, average 11.8 °C. About 1819 mm of rain falls in a year, on 123 days; May is the wettest month (237 mm) and July the driest (80 mm).

Average of the daily highs and lows, rain per month and days with at least 1 mm (ERA5 via Open-Meteo, the same grid cell as the frost dates).