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Last and first frost dates in Bayonne

France

In Bayonne the last spring frost usually comes around 26 January and the first autumn frost around 17 December, which leaves about 325 frost-free days (median of 2016–2025). Tomato seedlings can go into open ground from 19 April to 27 August.

Last spring frostaround 26 January
First autumn frostaround 17 December
Frost-free days325 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 Bayonne?

The last frost in Bayonne usually comes around 26 January: 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 5 January, while corn waits until 8 March. The first autumn frost follows around 17 December, about 325 days later: harvest or cover frost-tender crops before then.

When to sow and plant

CropSow for seedlingsPlant out in a greenhouseOpen ground
Achocha3 December – 8 September12 January – 18 October2 February – 18 October
Ageratumfrom 1 February—from 19 April
Arugula——sow 5 January – 12 November
Basil30 March – 15 October7 May – 22 November28 May – 22 November
Beet——sow 5 January – 18 October
Bell Pepper8 March – 28 June7 May – 27 August28 May – 27 August
Black-eyed Susanfrom 11 November—from 2 February
Bok Choy8 December – 26 October12 January – 30 November2 February – 30 November
Borage——sow 2 February – 23 October
Broad bean——sow 5 January – 8 September
Broccoli——sow 5 January – 1 September
Brussels Sprouts31 October – 30 July15 December – 13 September5 January – 13 September
Busy Lizziefrom 10 November—from 2 February
Cabbage——sow 5 January – 9 August
Calendula——sow from 5 January
Carrot——sow 5 January – 24 September
Cauliflower3 November – 1 September15 December – 13 October5 January – 13 October
Celeriac27 October – 29 June12 January – 14 September2 February – 14 September
Celery27 October – 9 July12 January – 24 September2 February – 24 September
Celosiafrom 23 Februaryfrom 9 Aprilfrom 30 April
Chamomile——sow 5 January – 13 October
Chayote19 November – 22 June15 February – 18 September8 March – 18 September
Chickpea——sow 5 January – 29 August
Chicory20 November – 23 September—5 January – 18 October
Chili Pepper8 March – 4 August7 May – 3 October28 May – 3 October
China asterfrom 16 Marchfrom 7 Mayfrom 28 May
Chives——sow 5 January – 4 October
Cilantro——sow 5 January – 14 October
Corn——sow 8 March – 29 August
Corn poppy——sow from 5 January
Cosmosfrom 23 Februaryfrom 9 Aprilfrom 30 April
Cucumber9 April – 4 September7 May – 2 October28 May – 2 October
Daikon——sow 5 January – 11 October
Delphiniumfrom 17 October—from 5 January
Dill——sow 5 January – 24 October
Edging lobeliafrom 10 November—from 2 February
Eggplant8 March – 28 June7 May – 27 August28 May – 27 August
Florence fennel28 November – 8 September12 January – 23 October2 February – 23 October
Foxglovefrom 29 September—from 5 January
Garden sorrel——sow 5 January – 12 October
Green Beans——sow 30 April – 6 September
Hollyhock——sow from 5 January
Hyssop——sow 5 January – 4 September
Kale——sow 5 January – 6 October
Kiwano25 February – 11 September29 March – 13 October19 April – 13 October
Kohlrabi——sow 5 January – 16 October
Leek6 October – 20 June15 December – 29 August5 January – 29 August
Lemon balm——sow 5 January – 8 October
Lettuce——sow 5 January – 21 October
Lisianthusfrom 19 Septemberfrom 15 Decemberfrom 5 January
Lovage——sow from 5 January
Luffa26 March – 6 July7 May – 17 August28 May – 17 August
Marigoldfrom 1 Decemberfrom 12 Januaryfrom 2 February
Marjoram8 March – 23 September—28 May – 22 November
Melon9 April – 22 August7 May – 19 September28 May – 19 September
Microgreens——sow 30 April – 3 December
Moringa23 March – 28 September17 May – 22 November7 June – 22 November
Moss rosefrom 17 November—from 2 February
Mustard greens——sow 5 January – 2 November
Napa cabbage10 December – 3 October12 January – 5 November2 February – 5 November
Nasturtiumfrom 5 Decemberfrom 12 Januaryfrom 2 February
Okra26 March – 16 September7 May – 28 October28 May – 28 October
Oregano16 October – 13 September15 December – 12 November5 January – 12 November
Pansyfrom 20 Octoberfrom 15 Decemberfrom 5 January
Parsley——sow 5 January – 2 October
Parsnip——sow 5 January – 21 August
Peanut31 March – 12 August7 May – 18 September28 May – 18 September
Peas——sow 5 January – 4 October
Petuniafrom 5 Marchfrom 7 Mayfrom 28 May
Physalis12 February – 9 August29 March – 23 September19 April – 23 September
Pumpkin26 March – 11 July7 May – 22 August28 May – 22 August
Purple coneflowerfrom 14 October—from 5 January
Radish——sow 5 January – 17 November
Sage27 October – 9 September15 December – 28 October5 January – 28 October
Scarlet sagefrom 5 February—from 19 April
Snapdragonfrom 11 Octoberfrom 15 Decemberfrom 5 January
Soybean——sow 28 May – 28 September
Spinach——sow 5 January – 23 October
Stevia8 February – 31 July29 March – 18 September19 April – 18 September
Stock——sow from 5 January
Sunflower——sow from 30 April
Sweet alyssum——sow from 5 January
Sweet Corn7 February – 23 September1 March – 15 October22 March – 15 October
Sweet peafrom 3 Novemberfrom 15 Decemberfrom 5 January
Sweet William——sow from 5 January
Swiss Chard——sow 5 January – 18 October
Thyme——sow 5 January – 29 August
Tomato5 February – 6 July29 March – 27 August19 April – 27 August
Turnip——sow 5 January – 20 October
Watercress——sow 5 January – 31 October
Watermelon9 April – 10 August7 May – 7 September28 May – 7 September
Zinniafrom 12 Aprilfrom 17 Mayfrom 7 June
Zucchini16 April – 9 September7 May – 30 September28 May – 30 September

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 Bayonne

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 12 days before the last spring frost and 15 °C 83 days after it.

SoilDateAgainst the last spring frost
5 °Calready in the first week of January—
10 °C14 January12 days earlier
15 °C19 April83 days later
18 °C28 May122 days later

Frost dates near Bayonne

Of the nearest cities on our list, the last spring frost ends earliest in San Sebastián (22 January) and latest in Vitoria-Gasteiz (6 April).

CityDistanceLast spring frostFirst autumn frost
San Sebastián45 km22 January3 December
Pamplona77 km21 March30 November
Pau92 km12 March4 December
Vitoria-Gasteiz121 km6 April24 November
Bilbao121 km14 March26 December

Seeds, seedlings and markets in Bayonne

Within 15 km of Bayonne OpenStreetMap lists 13 garden centres, 1 farm-supply shop, 20 markets and 34 farm shops (collected 27 October 2026). The nearest garden centre to the city centre is Maÿ, 1 km away.

Places: © OpenStreetMap contributors, ODbL.

What to grow at home in winter in Bayonne

Frosts in Bayonne usually come from about 17 December to about 26 January. 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 Bayonne by month

Average weather in Bayonne over 2016–2025: the warmest month is August. Months that average 20 °C or more by day: June–October (20.8–25.3 °C). No month averages below 0 °C at night; the coldest nights, in January, average 5.1 °C. About 1501 mm of rain falls in a year, on 162 days; November is the wettest month (218 mm) and July the driest (63 mm).

MonthDay, °CNight, °CRain, mmRainy days
January11.85.115315
February14611813
March15.37.413116
April17.39.311614
May19.612.211015
June22.915.811313
July24.417.56310
August25.317.87110
September23.415.512113
October20.812.911513
November15.78.721816
December13.5717214

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 17 November
Crocusby 17 November
Daffodilby 17 November
Garlic17 November – end of December
Grape hyacinthby 17 November
Helleboreby 17 November
Hyacinthby 17 November
Lilyby 17 November
Ornamental onionby 17 November
Peonyby 17 November
Saffronby 17 November
Snowdropby 17 November
Tulipby 17 November
Wild garlicby 17 November

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).