Last and first frost dates in Sendai

When is the last frost in Sendai?

The last frost in Sendai usually comes around 31 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 10 March, while corn waits until 24 April. The first autumn frost follows around 23 November, about 237 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 Sendai

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 43 days after it.

Frost dates near Sendai

Of the nearest cities on our list, the last spring frost ends earliest in Hamamatsu (24 February) and latest in Sapporo (9 May).

Seeds, seedlings and markets in Sendai

Within 15 km of Sendai OpenStreetMap lists 2 garden centres, 1 farm-supply shop, 4 markets and 2 farm shops (collected 28 October 2026). The nearest garden centre to the city centre is Greenhouse Miyama, 12 km away.

• Greenhouse Miyama — garden centre
  Mon–Sun 09:00–17:30 · 12 km
• Yuriage Minato Asaichi — market
  Mon–Sun 06:00–13:00 · 13 km · yuriageasaichi.jp
• marché lien — farm shop
  Mon–Sat 10:00–18:00; Sun, public holidays 09:00–18:00 · 12 km

• Where to buy seeds and seedlings in Sendai

Places: © OpenStreetMap contributors, ODbL.

Weather in Sendai by month

Average weather in Sendai over 2016–2025: the warmest month is August. Months that average 20 °C or more by day: May–September (20.1–27.9 °C). Nights average below 0 °C in January (-2.7 °C), February (-2.2 °C) and December (-0.2 °C). About 1604 mm of rain falls in a year, on 169 days; August is the wettest month (241 mm) and November the driest (61 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).