GreenlyLuxembourg: frost dates by city
The average last spring frost and first autumn frost in 3 cities of Luxembourg, from ten years of weather. The last spring frost comes earliest in Luxembourg and latest in Ettelbruck.
| City | Last spring frost | First autumn frost | Frost-free days | Soil at 10 °C | Tomato: planting out | Places to buy (OpenStreetMap) |
|---|---|---|---|---|---|---|
| Luxembourg | 15 April | 18 November | 217 days | 16 April | 16 May – 29 July | 32 |
| Esch-sur-Alzette | 16 April | 18 November | 216 days | 16 April | 21 May – 29 July | 26 |
| Ettelbruck | 27 April | 15 November | 202 days | 15 April | 15 May – 26 July | 12 |
The last spring frost comes 12 days later in Ettelbruck (27 April) than in Luxembourg (15 April). The frost-free season lasts 202–217 days. The top 7 cm of soil reaches 10 °C first in Ettelbruck (15 April) and last in Esch-sur-Alzette (16 April).
Places: © OpenStreetMap contributors, ODbL.
Median of 2016–2025 for the 25 km grid cell of the city: the last day at or below 0 °C in spring and the first in autumn (ERA5 reanalysis via Open-Meteo). In a cold year a frost can come a week or two later — Greenly warns 48 hours ahead.
