Last and first frost dates in Colmar

When is the last frost in Colmar?

The last frost in Colmar usually comes around 20 April: 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 30 March, while corn waits until 11 May. The first autumn frost follows around 17 November, about 211 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 Colmar

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 same day the last spring frost and 15 °C 41 days after it.

Frost dates near Colmar

Of the nearest cities on our list, the last spring frost ends earliest in Basel (5 April) and latest in Freiburg im Breisgau (12 April).

Seeds, seedlings and markets in Colmar

Within 15 km of Colmar OpenStreetMap lists 10 garden centres, 6 farm-supply shops, 1 plant nursery, 1 market and 8 farm shops (collected 27 October 2026). The nearest garden centre to the city centre is Trèfle vert, 3 km away.

• Trèfle vert — garden centre
  Mon–Fri 09:00–12:00, 14:00–18:30; Sat 09:00–12:00, 14:00–18:00 · 3 km
• ETS Michel — farm supply
  Mon–Fri 09:00–12:00, 14:00–18:00; Sat 09:00–12:00 · 4 km
• Marché couvert — market
  Rue des Écoles 13, 68000 · Tue, Wed, Thu 08:00–18:00; Fri 08:00–19:00; Sat 08:00–17:00; Sun 10:00–14:00 · 1 km · marche-couvert-colmar.fr
• Casier à légumes et produit locaux — farm shop
  Noehlen-Weg 80, 68000 Colmar · 24/7 · 2 km
• Auxine — garden centre
  Tue–Sat 09:00–18:00 · 4 km
• Apimiels — farm supply
  Rue Louis Blériot 3 · Tue, Thu, Fri 08:30–18:30; Sat 08:00–13:00 · 7 km

• Where to buy seeds and seedlings in Colmar
• Selling your own harvest in France

Places: © OpenStreetMap contributors, ODbL.

Weather in Colmar by month

Average weather in Colmar over 2016–2025: the warmest month is August. Months that average 20 °C or more by day: June (21.8 °C), July (23.1 °C) and August (23.2 °C). Nights average below 0 °C in January (-1.5 °C). About 1079 mm of rain falls in a year, on 163 days; January is the wettest month (124 mm) and September the driest (69 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).