Last and first frost dates in Aosta

When is the last frost in Aosta?

The last frost in Aosta usually comes around 6 June: 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 16 May, while corn waits until 22 June. The first autumn frost follows around 10 September, about 96 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 Aosta

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 4 days after the last spring frost and 15 °C 28 days after it.

Frost dates near Aosta

Of the nearest cities on our list, the last spring frost ends earliest in Turin (16 March) and latest in Sion (8 May).

Seeds, seedlings and markets in Aosta

Within 15 km of Aosta OpenStreetMap lists 4 garden centres, 2 markets and 2 farm shops (collected 27 October 2026). The nearest garden centre to the city centre is Agricenter, 3 km away.

• Agricenter — garden centre
  Via / Rue de la Croix-Noire 79, 11020 Saint-Christophe · Mon–Sat 08:30–12:30; Mon–Fri 15:00–19:00 · 3 km
• Mercato coperto / Halles d'Aoste — market
  Piazza dei Cavalieri di Vittorio Veneto - Place des Chevaliers de Vittorio Veneto, 11100 Aosta / Aoste · Mon, Tue, Thu, Fri 07:30–14:00; Wed, Sat 07:00–15:00 · 1 km

• Where to buy seeds and seedlings in Aosta
• Selling your own harvest in Italy

Places: © OpenStreetMap contributors, ODbL.

Weather in Aosta by month

Average weather in Aosta over 2016–2025: the warmest month is July. No month averages 20 °C by day; the warmest, July, reaches 18.8 °C. Nights average below 0 °C in November–May (-11.9–-0.7 °C). About 1129 mm of rain falls in a year, on 138 days; May is the wettest month (132 mm) and July the driest (58 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).