Last and first frost dates in Namur

When is the last frost in Namur?

The last frost in Namur usually comes around 11 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 21 March, while corn waits until 23 April. The first autumn frost follows around 15 November, about 218 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 Namur

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 7 days before the last spring frost and 15 °C 35 days after it.

Frost dates near Namur

Of the nearest cities on our list, the last spring frost ends earliest in Brussels (10 April) and latest in Hasselt (19 April).

Seeds, seedlings and markets in Namur

Within 15 km of Namur OpenStreetMap lists 14 garden centres, 2 plant nurseries, 3 markets and 11 farm shops (collected 27 October 2026). The nearest garden centre to the city centre is Aveve, 3 km away.

• Aveve — garden centre
  Mon–Sat 09:00–18:00 · 3 km · aveve.be
• Pépinière Chlorophylle — plant nursery
  Rue Arthur Patiny 38, 5150 Floreffe · 9 km
• Marché du Bord de l'eau — market
  Boulevard Frère Orban · Sat 08:30–13:00 · 1 km
• Paysans-Artisans — farm shop
  Rue des Carmes 42, 5000 Namur · Mon 12:00–18:30; Tue–Fri 10:30–18:30; Sat 09:00–18:30 · 1 km · paysans-artisans.be
• Tournesols Cognelée — garden centre
  Chaussée de Louvain 929, 5022 Cognelée · Mon–Sat 09:00–19:00; Sun, public holidays 09:00–18:00 · 5 km · tournesols.com
• Marché bio de la Plante — market
  Tue 15:00–20:00 · 3 km

• Where to buy seeds and seedlings in Namur
• Selling your own harvest in Belgium

Places: © OpenStreetMap contributors, ODbL.

Weather in Namur by month

Average weather in Namur over 2016–2025: the warmest month is August. Months that average 20 °C or more by day: June (21.8 °C), July (22.8 °C) and August (23.1 °C). No month averages below 0 °C at night; the coldest nights, in January, average 0.6 °C. About 834 mm of rain falls in a year, on 150 days; January is the wettest month (86 mm) and April the driest (47 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).