Last and first frost dates in Caxias do Sul

When is the last frost in Caxias do Sul?

The last frost in Caxias do Sul usually comes around 13 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 22 June, while corn waits until 20 July. The first autumn frost follows around 17 June, about 339 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 Caxias do Sul

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 Caxias do Sul

Of the nearest cities on our list, the last spring frost ends earliest in Santa Maria (16 July) and latest in Lages (14 August).

Weather in Caxias do Sul by month

Average weather in Caxias do Sul over 2016–2025: the warmest month is January. Months that average 20 °C or more by day: September–April (21.5–27.1 °C). No month averages below 0 °C at night; the coldest nights, in July, average 9.5 °C. About 1838 mm of rain falls in a year, on 173 days; May is the wettest month (199 mm) and August the driest (112 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).