Last and first frost dates in Colonia del Sacramento

When is the last frost in Colonia del Sacramento?

The last frost in Colonia del Sacramento usually comes around 9 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 18 June, while corn waits until 16 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 Colonia del Sacramento

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 Colonia del Sacramento

Of the nearest cities on our list, the last spring frost ends earliest in Las Piedras (11 July) and latest in La Plata (30 July).

Weather in Colonia del Sacramento by month

Average weather in Colonia del Sacramento over 2016–2025: the warmest month is January. Months that average 20 °C or more by day: October–April (21.3–28.9 °C). No month averages below 0 °C at night; the coldest nights, in July, average 8 °C. About 1082 mm of rain falls in a year, on 100 days; March is the wettest month (142 mm) and June the driest (63 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).