Last and first frost dates in Petrozavodsk

When is the last frost in Petrozavodsk?

The last frost in Petrozavodsk usually comes around 10 May: 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 19 April, while corn waits until 29 May. The first autumn frost follows around 17 October, about 160 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 Petrozavodsk

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 11 days after the last spring frost and 15 °C 42 days after it.

Frost dates near Petrozavodsk

Of the nearest cities on our list, the last spring frost ends earliest in Saint Petersburg (1 May) and latest in Vologda (13 May).

Seeds, seedlings and markets in Petrozavodsk

Within 15 km of Petrozavodsk OpenStreetMap lists 8 garden centres and 2 farm shops (collected 27 October 2026). The nearest garden centre to the city centre is Клевер, 1 km away.

• Клевер — garden centre
  Mon–Sun 10:00–20:00 · 1 km
• Эссойла — farm shop
  Ключевая улица, Петрозаводск · 5 km
• Клевер — garden centre
  Mon–Fri 10:00–19:00; Sat, Sun 11:00–17:00 · 2 km
• Крокус — garden centre
  Mon–Fri 11:00–20:00; Sat 11:00–18:00; Sun 11:00–17:00 · 2 km
• Клевер — garden centre
  Mon–Sun 10:00–20:00 · 3 km
• Ландшафт — garden centre
  Mon–Fri 09:00–19:00; Sat, Sun 09:00–18:00 · 7 km

• Where to buy seeds and seedlings in Petrozavodsk
• Selling your own harvest in Russia

Places: © OpenStreetMap contributors, ODbL.

Weather in Petrozavodsk by month

Average weather in Petrozavodsk over 2016–2025: the warmest month is July. Months that average 20 °C or more by day: July (20.7 °C). Nights average below 0 °C in November–April (-10.4–-2.5 °C). About 744 mm of rain falls in a year, on 152 days; July is the wettest month (107 mm) and March the driest (39 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).