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Last and first frost dates in Bahía Blanca

Argentina

In Bahía Blanca the last spring frost usually comes around 8 August and the first autumn frost around 15 June, which leaves about 311 frost-free days (median of 2016–2025). Tomato seedlings can go into open ground from 23 September to 23 February.

Last spring frostaround 8 August
First autumn frostaround 15 June
Frost-free days311 days

Median of 2016–2025 for the 25 km grid cell of the city: the last day at or below 0 °C in spring and the first in autumn (ERA5 reanalysis via Open-Meteo). In a cold year a frost can come a week or two later — Greenly warns 48 hours ahead.

When is the last frost in Bahía Blanca?

The last frost in Bahía Blanca usually comes around 8 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 18 July, while corn waits until 31 August. The first autumn frost follows around 15 June, about 311 days later: harvest or cover frost-tender crops before then.

When to sow and plant

CropSow for seedlingsPlant out in a greenhouseOpen ground
Achocha15 June – 6 March25 July – 15 April15 August – 15 April
Ageratumfrom 8 July—from 23 September
Arugula——sow 18 July – 10 May
Basil7 September – 12 April15 October – 20 May5 November – 20 May
Beet——sow 18 July – 15 April
Bell Pepper16 August – 25 December15 October – 23 February5 November – 23 February
Black-eyed Susanfrom 24 May—from 15 August
Bok Choy20 June – 23 April25 July – 28 May15 August – 28 May
Borage——sow 15 August – 20 April
Broad bean——sow 18 July – 6 March
Broccoli——sow 18 July – 28 February
Brussels Sprouts13 May – 26 January27 June – 11 March18 July – 11 March
Busy Lizziefrom 23 May—from 15 August
Cabbage——sow 18 July – 5 February
Calendula——sow from 18 July
Carrot——sow 18 July – 22 March
Cauliflower16 May – 28 February27 June – 10 April18 July – 10 April
Celeriac9 May – 26 December25 July – 12 March15 August – 12 March
Celery9 May – 5 January25 July – 22 March15 August – 22 March
Celosiafrom 6 Augustfrom 20 Septemberfrom 11 October
Chamomile——sow 18 July – 10 April
Chayote14 May – 19 December10 August – 16 March31 August – 16 March
Chickpea——sow 18 July – 25 February
Chicory2 June – 21 March—18 July – 15 April
Chili Pepper16 August – 31 January15 October – 31 March5 November – 31 March
China asterfrom 24 Augustfrom 15 Octoberfrom 5 November
Chives——sow 18 July – 1 April
Cilantro——sow 18 July – 11 April
Corn——sow 31 August – 25 February
Corn poppy——sow from 18 July
Cosmosfrom 6 Augustfrom 20 Septemberfrom 11 October
Cucumber17 September – 2 March15 October – 30 March5 November – 30 March
Daikon——sow 18 July – 8 April
Delphiniumfrom 29 April—from 18 July
Dill——sow 18 July – 21 April
Edging lobeliafrom 23 May—from 15 August
Eggplant16 August – 25 December15 October – 23 February5 November – 23 February
Florence fennel10 June – 6 March25 July – 20 April15 August – 20 April
Foxglovefrom 11 April—from 18 July
Garden sorrel——sow 18 July – 9 April
Green Beans——sow 11 October – 4 March
Hollyhock——sow from 18 July
Hyssop——sow 18 July – 2 March
Kale——sow 18 July – 3 April
Kiwano1 August – 9 March2 September – 10 April23 September – 10 April
Kohlrabi——sow 18 July – 13 April
Leek18 April – 17 December27 June – 25 February18 July – 25 February
Lemon balm——sow 18 July – 5 April
Lettuce——sow 18 July – 18 April
Lisianthusfrom 1 Aprilfrom 27 Junefrom 18 July
Lovage——sow from 18 July
Luffa3 September – 2 January15 October – 13 February5 November – 13 February
Marigoldfrom 13 Junefrom 25 Julyfrom 15 August
Marjoram16 August – 21 March—5 November – 20 May
Melon17 September – 18 February15 October – 17 March5 November – 17 March
Microgreens——sow 11 October – 31 May
Moringa24 August – 26 March18 October – 20 May8 November – 20 May
Moss rosefrom 30 May—from 15 August
Mustard greens——sow 18 July – 30 April
Napa cabbage22 June – 31 March25 July – 3 May15 August – 3 May
Nasturtiumfrom 17 Junefrom 25 Julyfrom 15 August
Okra3 September – 14 March15 October – 25 April5 November – 25 April
Oregano28 April – 11 March27 June – 10 May18 July – 10 May
Pansyfrom 2 Mayfrom 27 Junefrom 18 July
Parsley——sow 18 July – 30 March
Parsnip——sow 18 July – 17 February
Peanut8 September – 8 February15 October – 16 March5 November – 16 March
Peas——sow 18 July – 1 April
Petuniafrom 13 Augustfrom 15 Octoberfrom 5 November
Physalis19 July – 5 February2 September – 21 March23 September – 21 March
Pumpkin3 September – 7 January15 October – 18 February5 November – 18 February
Purple coneflowerfrom 26 April—from 18 July
Radish——sow 18 July – 15 May
Sage9 May – 7 March27 June – 25 April18 July – 25 April
Scarlet sagefrom 12 July—from 23 September
Snapdragonfrom 23 Aprilfrom 27 Junefrom 18 July
Soybean——sow 5 November – 26 March
Spinach——sow 18 July – 20 April
Stevia15 July – 27 January2 September – 16 March23 September – 16 March
Stock——sow from 18 July
Sunflower——sow from 11 October
Sweet alyssum——sow from 18 July
Sweet Corn26 July – 21 March17 August – 12 April7 September – 12 April
Sweet peafrom 16 Mayfrom 27 Junefrom 18 July
Sweet William——sow from 18 July
Swiss Chard——sow 18 July – 15 April
Thyme——sow 18 July – 25 February
Tomato12 July – 2 January2 September – 23 February23 September – 23 February
Turnip——sow 18 July – 17 April
Watercress——sow 18 July – 28 April
Watermelon17 September – 6 February15 October – 5 March5 November – 5 March
Zinniafrom 13 Septemberfrom 18 Octoberfrom 8 November
Zucchini24 September – 7 March15 October – 28 March5 November – 28 March

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 Bahía Blanca

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 15 days before the last spring frost and 15 °C 46 days after it.

SoilDateAgainst the last spring frost
5 °Calready in the first week of July—
10 °C24 July15 days earlier
15 °C23 September46 days later
18 °C5 November89 days later

Frost dates near Bahía Blanca

Of the nearest cities on our list, the last spring frost ends earliest in Mar del Plata (15 July) and latest in Neuquén (25 August).

CityDistanceLast spring frostFirst autumn frost
Santa Rosa293 km25 August13 June
Tandil315 km24 August15 June
Mar del Plata418 km15 July—
General Roca461 km25 August1 June
Neuquén502 km25 August9 June

Seeds, seedlings and markets in Bahía Blanca

Within 15 km of Bahía Blanca OpenStreetMap lists 9 garden centres and 4 markets (collected 27 October 2026). The nearest garden centre to the city centre is Vivero Caronti, 1 km away.

Places: © OpenStreetMap contributors, ODbL.

What to grow at home in winter in Bahía Blanca

Frosts in Bahía Blanca usually come from about 15 June to about 8 August. These plants have indoor care in their Greenly cards and are harvested quickly, so they can be sown on a windowsill in winter.

Weather in Bahía Blanca by month

Average weather in Bahía Blanca over 2016–2025: the warmest month is January. Months that average 20 °C or more by day: October–April (21–30.4 °C). Months that average 30 °C or more by day: January (30.4 °C). No month averages below 0 °C at night; the coldest nights, in July, average 4.8 °C. About 593 mm of rain falls in a year, on 72 days; March is the wettest month (80 mm) and July the driest (25 mm).

MonthDay, °CNight, °CRain, mmRainy days
January30.419.1536
February28.618487
March25.715.8807
April2112.3637
May16.28.4466
June13.45.8295
July12.84.8254
August15.56.3254
September18.38.3446
October21.211557
November2514.2717
December28.816.8546

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

CropWhen to plant
Bearded Irisby 16 May
Crocusby 16 May
Daffodilby 16 May
Garlic16 May – end of June
Grape hyacinthby 16 May
Helleboreby 16 May
Hyacinthby 16 May
Lilyby 16 May
Ornamental onionby 16 May
Peonyby 16 May
Saffronby 16 May
Snowdropby 16 May
Tulipby 16 May
Wild garlicby 16 May

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).