Last and first frost dates in Trieste

When is the last frost in Trieste?

The last frost in Trieste usually comes around 19 March: 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 26 February, while corn waits until 21 April. The first autumn frost follows around 28 November, about 254 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 Trieste

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 16 days after the last spring frost and 15 °C 60 days after it.

Frost dates near Trieste

Of the nearest cities on our list, the last spring frost ends earliest in Venice (19 February) and latest in Klagenfurt (21 May).

Seeds, seedlings and markets in Trieste

Within 15 km of Trieste OpenStreetMap lists 19 garden centres, 2 farm-supply shops, 1 plant nursery, 9 markets and 3 farm shops (collected 20 October 2026). The nearest garden centre to the city centre is Agro S.n.c., 1 km away.

• Agro S.n.c. — garden centre
  Via San Giacomo in Monte 15, 34137 Trieste · 1 km
• Trgoargo — farm supply
  Cesta borcev 1a, 6000 Koper · 12 km
• Mercato Comunale Coperto — market
  Mon 08:00–14:00, Tue–Sat 08:00–17:00; public holidays closed · 0 km
• Kmetija Kaprolovi — farm shop
  Štorje 18, 6210 Sežana · 15 km · sadjekras.com
• Biogeste Vivai & Giardini — garden centre
  Via Brandesia 13, 34128 Trieste · Mon–Sat 08:30–19:00; public holidays closed · 2 km
• Piazza Sant'Antonio — market
  Tue–Sat 07:30–14:00 · 1 km

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

Places: © OpenStreetMap contributors, ODbL.

Weather in Trieste by month

Average weather in Trieste over 2016–2025: the warmest month is August. Months that average 20 °C or more by day: June–September (21.7–26.9 °C). No month averages below 0 °C at night; the coldest nights, in January, average 0.1 °C. About 1544 mm of rain falls in a year, on 129 days; September is the wettest month (189 mm) and June the driest (90 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).