GreenlyMexico: frost dates by city
The average last spring frost and first autumn frost in 5 cities of Mexico, from ten years of weather. The last spring frost comes earliest in Monterrey and latest in Chihuahua.
| City | Last spring frost | First autumn frost | Frost-free days |
|---|---|---|---|
| Guadalajara | none in ten years | none in ten years | — |
| Mexico City | none in ten years | 9 December | — |
| Puebla | none in ten years | none in ten years | — |
| Monterrey | 18 January | 23 December | 339 days |
| Chihuahua | 8 February | 8 December | 303 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.