Last and first frost dates in Puerto Montt

When is the last frost in Puerto Montt?

The last frost in Puerto Montt usually comes around 22 August: 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 1 August, while corn waits until 6 November. The first autumn frost follows around 6 June, about 288 days later: harvest or cover frost-tender crops before then.

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 Puerto Montt

The day the top 7 cm of soil first averages each temperature over a week, median of 2016–2025 (ERA5 via Open-Meteo). The soil reaches 10 °C 53 days after the last spring frost and 15 °C 109 days after it.

Frost dates near Puerto Montt

Of the nearest cities on our list, the last spring frost ends earliest in Valdivia (13 August) and latest in Bariloche (27 December).

Seeds, seedlings and markets in Puerto Montt

Within 15 km of Puerto Montt OpenStreetMap lists 4 garden centres, 1 plant nursery and 11 markets (collected 20 October 2026). The nearest garden centre to the city centre is Vivero Las Hortensias, 9 km away.

• Vivero Las Hortensias — garden centre
  Carretera Austral Km. 10, Puerto Montt · 9 km
• Mercado Municipal Presidente Ibáñez — market
  Avenida Presidente Ibáñez 708 · 1 km

• Where to buy seeds and seedlings in Puerto Montt
• Selling your own harvest in Chile

Places: © OpenStreetMap contributors, ODbL.

Weather in Puerto Montt by month

Average weather in Puerto Montt over 2016–2025: the warmest month is February. No month averages 20 °C by day; the warmest, February, reaches 18.7 °C. No month averages below 0 °C at night; the coldest nights, in July, average 4.3 °C. About 1863 mm of rain falls in a year, on 186 days; June is the wettest month (254 mm) and February the driest (60 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).

Planted in autumn

From a month before the first autumn frost, so the roots grow before winter, to the late-planting limit on each crop’s page (about two weeks before the ground freezes, by ten years of weather).