GreenlyItaly: frost dates by city
The average last spring frost and first autumn frost in 3 cities of Italy, from ten years of weather. The last spring frost comes earliest in Rome and latest in Milan.
| City | Last spring frost | First autumn frost | Frost-free days |
|---|---|---|---|
| Naples | none in ten years | none in ten years | — |
| Rome | 27 January | 10 December | 317 days |
| Milan | 28 February | 30 November | 275 days |
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.