Last and first frost dates in San Rafael

When is the last frost in San Rafael?

The last frost in San Rafael usually comes around 23 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 2 August, while corn waits until 30 August. The first autumn frost follows around 5 June, about 286 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 San Rafael

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 18 days before the last spring frost and 15 °C 19 days after it.

Frost dates near San Rafael

Of the nearest cities on our list, the last spring frost ends earliest in Santiago (9 August) and latest in Curicó (25 August).

Seeds, seedlings and markets in San Rafael

Within 15 km of San Rafael OpenStreetMap lists 1 garden centre, 1 market and 1 farm shop (collected 28 October 2026). The nearest garden centre to the city centre is Vivero Cedro Azul, 2 km away.

• Vivero Cedro Azul — garden centre
  Marcelino Champagnat 435, 5600 · 2 km
• La Lili — market
  Lassa, 5600 · Tue–Sun 09:00–21:00 · 7 km

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

Places: © OpenStreetMap contributors, ODbL.

Weather in San Rafael by month

Average weather in San Rafael over 2016–2025: the warmest month is January. Months that average 20 °C or more by day: September–April (21.4–31.6 °C). Months that average 30 °C or more by day: January (31.6 °C), February (30.4 °C) and December (31 °C). No month averages below 0 °C at night; the coldest nights, in July, average 2.2 °C. About 341 mm of rain falls in a year, on 52 days; January is the wettest month (52 mm) and July the driest (8 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).