When to plant watermelons in Clermont-Ferrand: 27 June – 3 August

In Clermont-Ferrand, watermelon: sow for seedlings from 9 May to 6 July; plant into a greenhouse from 6 June to 3 August; plant out into open ground from 27 June to 3 August.

Watermelon in Clermont-Ferrand: soil, season and weather

In Clermont-Ferrand the soil, not frost, sets the date: the last frost is over around 15 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 27 June, 73 days later.

Last spring frost	15 April
Top 7 cm of soil at 18 °C	27 June, 73 days after the last frost
Into an unheated greenhouse	6 June – 3 August; June outside: 11.2 °C at night, 19.9 °C by day; card 18–35 °C
First autumn frost	12 November, 138 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	25 August – 1 October
Days left for picking	79
Daylight	15:25 on 30 May, 15:42 on 27 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, July, has 10 rainy days

The same dates in Clermont-Ferrand hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Pumpkin.

Watermelon in Clermont-Ferrand: care after planting

Planted on 27 June: in the first weeks water every 5 days.

Feeding, by the card’s schedule from that day:

27 June — feed: balanced (NPK)

Pests and diseases of watermelon to watch for:

Dates count from the first planting day of the window above; a later planting moves them by as many days.

Weather in Clermont-Ferrand during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, August, averages 22.5 °C. Months that stay below 18 °C even by day on average: October (14.4 °C) and November (8.3 °C). Nights average below 18 °C in every month of the season, from 2.1 °C to 12.8 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	19.9	11.2	129	15	15:42
July	22.1	12.6	58	10	15:23
August	22.5	12.8	60	10	14:10
September	18.4	9.5	70	11	12:36
October	14.4	6.6	74	11	11:00
November	8.3	2.1	81	14	9:30

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Clermont-Ferrand, Lyon is 31 days earlier and Grenoble 1 day later.

City	Distance	Date	Difference
Saint-Étienne	109 km	14 June – 8 August	13 days earlier
Lyon	137 km	27 May – 16 August	31 days earlier
Limoges	141 km	6 June – 18 August	21 days earlier
Valence	171 km	29 May – 12 August	29 days earlier
Grenoble	216 km	28 June – 16 July	1 day later
Chambéry	222 km	3 June – 11 August	24 days earlier

Where to buy watermelon plants and seeds near Clermont-Ferrand

Buy plants ready to set out from 27 June to 3 August (from 6 June to 3 August for an unheated greenhouse); seed for raising your own is sown from 9 May to 6 July. Within 15 km of Clermont-Ferrand OpenStreetMap lists 13 garden centres, 7 farm-supply shops, 13 markets and 8 farm shops (collected 20 October 2026).

Les Serres Fleuries — garden centre
10 km
Activert — garden centre
11 km
Geneform — farm supply
7 km · geneform.fr
Agroservices2000 — farm supply
10 km · agroservice2000.com

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.

Questions