Last and first frost dates in Gatineau

When is the last frost in Gatineau?

The last frost in Gatineau 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 18 May. The first autumn frost follows around 1 November, about 185 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 Gatineau

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 12 days after the last spring frost and 15 °C 27 days after it.

Frost dates near Gatineau

Of the nearest cities on our list, the last spring frost ends earliest in Burlington (22 April) and latest in Ottawa (30 April).

Seeds, seedlings and markets in Gatineau

Within 15 km of Gatineau OpenStreetMap lists 9 garden centres, 1 farm-supply shop, 7 markets and 1 farm shop (collected 20 October 2026). The nearest garden centre to the city centre is Emery, 6 km away.

• Emery — garden centre
  Boulevard Maloney Est 600, J8P 7M4 Gatineau · Mon–Wed 08:30–20:00; Thu–Fri 08:30–21:00; Sat 08:30–17:00; Sun 08:30–17:00 · 6 km · emerycentrejardin.ca
• La ferme Bee Api — farm supply
  Route du Carrefour 1895, J8N 7T5 Val-des-Monts · 13 km
• Main Street Farmers' Market — market
  May 16–Oct 31 Sat 09:00–14:00 · 8 km · ottawafarmersmarket.ca
• Ritchie Feed & Seed — garden centre
  Windmill Lane 1390, K1B 4V5 · 10 km · ritchiefeed.com
• Lansdowne Farmers' Market — market
  May 3–Oct 25 Sun 09:00–15:00 · 9 km · ottawafarmersmarket.ca
• Budd Gardens — garden centre
  Innes Road 2832 · 12 km

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

Places: © OpenStreetMap contributors, ODbL.

Weather in Gatineau by month

Average weather in Gatineau over 2016–2025: the warmest month is July. Months that average 20 °C or more by day: June–September (21.3–26.4 °C). Nights average below 0 °C in November–April (-12.8–-0.1 °C). About 1135 mm of rain falls in a year, on 145 days; July is the wettest month (119 mm) and September the driest (73 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).