When to plant watermelons in Chambéry: 3 June – 11 August

In Chambéry, watermelon: sow for seedlings from 15 April to 14 July; plant into a greenhouse from 13 May to 11 August; plant out into open ground from 3 June to 11 August.

Watermelon in Chambéry: soil, season and weather

In Chambéry the soil, not frost, sets the date: the last frost is over around 5 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 3 June, 59 days later.

Last spring frost	5 April
Top 7 cm of soil at 18 °C	3 June, 59 days after the last frost
Into an unheated greenhouse	13 May – 11 August; May outside: 10.1 °C at night, 19.8 °C by day; card 18–35 °C
First autumn frost	20 November, 170 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	1 August – 9 October
Days left for picking	111
Daylight	14:31 on 6 May, 15:29 on 3 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, August, has 10 rainy days

The same dates in Chambéry hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Pumpkin.

Watermelon in Chambéry: care after planting

Planted on 3 June: in the first weeks water every 5 days.

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

3 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 Chambéry during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, August, averages 27.4 °C. Months that stay below 18 °C even by day on average: November (11.5 °C). Nights average below 18 °C in every month of the season, from 3.8 °C to 16.7 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	25.1	15.1	146	16	15:40
July	27.2	16.7	113	12	15:22
August	27.4	16.6	94	10	14:09
September	22.5	12.9	117	12	12:35
October	18.4	9.1	137	12	11:00
November	11.5	3.8	153	13	9:32

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Chambéry, Lyon is 7 days earlier and Aosta 28 days later.

City	Distance	Date	Difference
Annecy	41 km	19 June – 5 August	16 days later
Grenoble	45 km	28 June – 16 July	25 days later
Geneva	72 km	8 June – 8 August	5 days later
Lyon	87 km	27 May – 16 August	7 days earlier
Valence	106 km	29 May – 12 August	5 days earlier
Aosta	110 km	1 July – 13 July	28 days later

Where to buy watermelon plants and seeds near Chambéry

Buy plants ready to set out from 3 June to 11 August (from 13 May to 11 August for an unheated greenhouse); seed for raising your own is sown from 15 April to 14 July. Within 15 km of Chambéry OpenStreetMap lists 12 garden centres, 1 farm-supply shop, 3 plant nurseries, 5 markets and 18 farm shops (collected 27 October 2026).

Irri'Jardin — garden centre
4 km
Indoor Gardens — garden centre
3 km
Pépinières Millet — garden centre
10 km
Cholat Pépinières — plant nursery
2 km

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