GreenlyUnited Kingdom: frost dates by city
The average last spring frost and first autumn frost in 9 cities of United Kingdom, from ten years of weather. The last spring frost comes earliest in Cardiff and latest in Glasgow.
| City | Last spring frost | First autumn frost | Frost-free days |
|---|---|---|---|
| Cardiff | 25 March | 22 November | 242 days |
| London | 4 April | 23 November | 233 days |
| Bristol | 11 April | 22 November | 225 days |
| Belfast | 18 April | 19 November | 215 days |
| Leeds | 18 April | 23 November | 219 days |
| Manchester | 22 April | 14 November | 206 days |
| Birmingham | 26 April | 19 November | 207 days |
| Edinburgh | 28 April | 9 November | 195 days |
| Glasgow | 28 April | 11 November | 197 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.