GreenlySpain: frost dates by city
The average last spring frost and first autumn frost in 19 cities of Spain, from ten years of weather. The last spring frost comes earliest in Valencia and latest in Burgos.
| City | Last spring frost | First autumn frost | Frost-free days |
|---|---|---|---|
| Alicante | none in ten years | none in ten years | — |
| Las Palmas | none in ten years | none in ten years | — |
| Málaga | none in ten years | none in ten years | — |
| Palma | none in ten years | none in ten years | — |
| Valencia | 15 January | none in ten years | — |
| Seville | 16 January | none in ten years | — |
| Murcia | 17 January | none in ten years | — |
| A Coruña | 20 January | none in ten years | — |
| Barcelona | 24 January | 12 December | 322 days |
| Zaragoza | 28 January | 20 December | 326 days |
| Toledo | 18 February | 6 December | 291 days |
| Bilbao | 14 March | 26 December | 287 days |
| Pamplona | 21 March | 30 November | 254 days |
| Madrid | 22 March | 27 November | 250 days |
| Granada | 30 March | 26 November | 241 days |
| Oviedo | 31 March | 6 December | 250 days |
| Salamanca | 1 April | 23 November | 236 days |
| Valladolid | 6 April | 27 November | 235 days |
| Burgos | 18 April | 17 November | 213 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.