Last and first frost dates in Fredericton

When is the last frost in Fredericton?

The last frost in Fredericton 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 26 May. The first autumn frost follows around 28 October, about 181 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 Fredericton

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 18 days after the last spring frost and 15 °C 36 days after it.

Frost dates near Fredericton

Of the nearest cities on our list, the last spring frost ends earliest in Augusta (23 April) and latest in Charlottetown (10 May).

Seeds, seedlings and markets in Fredericton

Within 15 km of Fredericton OpenStreetMap lists 4 garden centres, 1 farm-supply shop, 2 plant nurseries, 2 markets and 6 farm shops (collected 20 October 2026). The nearest farm supply to the city centre is Shur-Gain Feeds 'n' Needs, 2 km away.

• Shur-Gain Feeds 'n' Needs — farm supply
  Saunders Street 50, Fredericton · 2 km
• Ferguson's Christmas Trees — plant nursery
  Carlisle Road 16 · 6 km
• The Cultural Market — market
  Saunders Street 28, Fredericton · 2 km
• Boyce Farmers Market — market
  Sat 06:00–13:00 · 3 km

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

Places: © OpenStreetMap contributors, ODbL.

Weather in Fredericton by month

Average weather in Fredericton over 2016–2025: the warmest month is July. Months that average 20 °C or more by day: June–September (20.5–25.6 °C). Nights average below 0 °C in November–April (-12–-0.4 °C). About 1278 mm of rain falls in a year, on 134 days; December is the wettest month (126 mm) and February the driest (89 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).