Last and first frost dates in Kitchener

When is the last frost in Kitchener?

The last frost in Kitchener usually comes around 30 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 9 April, while corn waits until 16 May. The first autumn frost follows around 26 October, about 179 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 Kitchener

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 2 days before the last spring frost and 15 °C 22 days after it.

Frost dates near Kitchener

Of the nearest cities on our list, the last spring frost ends earliest in Erie (10 April) and latest in London (Canada) (28 April).

Seeds, seedlings and markets in Kitchener

Within 15 km of Kitchener OpenStreetMap lists 13 garden centres, 1 farm-supply shop, 4 markets and 5 farm shops (collected 20 October 2026). The nearest garden centre to the city centre is Warren Greenhouses, 2 km away.

• Warren Greenhouses — garden centre
  Strange Street 115 · 2 km
• Snyder's Heritage Farm — farm supply
  Maple Bend Road · 12 km
• Kitchener Market — market
  King Street East 300, N2G 2L3 Kitchener · 3 km · kitchenermarket.ca
• Gmach Gardens — farm shop
  Huron Road 1383, N0B 2H0 Wilmot · 7 km · gmach.ca
• L&L Market — garden centre
  Lancaster Street West 101 · Mon–Sat 08:00–19:00; Sun 09:00–18:00 · 4 km
• St. Jacobs Farmers' Market — market
  Weber Street North 878, N2J 4A9 Waterloo · Thu 08:00–15:00; Sat 07:00–15:30 · 10 km · en.wikipedia.org

• Where to buy seeds and seedlings in Kitchener
• Selling your own harvest in Canada

Places: © OpenStreetMap contributors, ODbL.

Weather in Kitchener by month

Average weather in Kitchener over 2016–2025: the warmest month is July. Months that average 20 °C or more by day: June–September (22.1–26.8 °C). Nights average below 0 °C in November–March (-8.6–-0.2 °C). About 952 mm of rain falls in a year, on 147 days; June is the wettest month (97 mm) and November the driest (66 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).