Last and first frost dates in León
Mexico
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| Last spring frost | none in ten years |
|---|---|
| First autumn frost | around 15 December |
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.
When the soil warms up in León
The day the top 7 cm of soil first averages each temperature over a week, median of 2016–2025 (ERA5 via Open-Meteo).
| Soil | Date |
|---|---|
| 5 °C | already in the first week of January |
| 10 °C | already in the first week of January |
| 15 °C | already in the first week of January |
| 18 °C | 4 February |
Frost dates near León
Of the nearest cities on our list, the last spring frost ends earliest in Aguascalientes (6 January) and latest in San Luis Potosí (28 February).
| City | Distance | Last spring frost | First autumn frost |
|---|---|---|---|
| Irapuato | 61 km | — | — |
| Aguascalientes | 105 km | 6 January | 12 December |
| Celaya | 112 km | — | — |
| San Luis Potosí | 135 km | 28 February | 15 December |
| Querétaro | 146 km | — | — |
León: weather for the next 7 days
Forecast by Open-Meteo. Nights at or below 0 °C are marked as frost.
Weather in León by month
Average weather in León over 2016–2025: the warmest month is May. Months that average 20 °C or more by day: January–December (23.6–31.9 °C). Months that average 30 °C or more by day: April (31 °C) and May (31.9 °C). No month averages below 0 °C at night; the coldest nights, in January, average 8 °C. About 612 mm of rain falls in a year, on 87 days; July is the wettest month (143 mm) and March the driest (4 mm).
| Month | Day, °C | Night, °C | Rain, mm | Rainy days |
|---|---|---|---|---|
| January | 23.8 | 8 | 6 | 2 |
| February | 26.3 | 9.7 | 8 | 2 |
| March | 29.3 | 11.8 | 4 | 1 |
| April | 31 | 13.9 | 4 | 1 |
| May | 31.9 | 15.8 | 27 | 5 |
| June | 29.4 | 15.9 | 115 | 12 |
| July | 26.5 | 14.6 | 143 | 20 |
| August | 26.5 | 14.6 | 119 | 17 |
| September | 25.9 | 14.1 | 120 | 16 |
| October | 26.2 | 12.7 | 41 | 7 |
| November | 25.5 | 10.5 | 17 | 2 |
| December | 23.6 | 8.5 | 8 | 2 |
Average of the daily highs and lows, rain per month and days with at least 1 mm (ERA5 via Open-Meteo, the same grid cell as the frost dates).
Planted in autumn
| Crop | When to plant |
|---|---|
| Bearded Iris | by 15 November |
| Crocus | by 15 November |
| Daffodil | by 15 November |
| Garlic | by 15 November |
| Grape hyacinth | by 15 November |
| Hellebore | by 15 November |
| Hyacinth | by 15 November |
| Lily | by 15 November |
| Ornamental onion | by 15 November |
| Peony | by 15 November |
| Saffron | by 15 November |
| Snowdrop | by 15 November |
| Tulip | by 15 November |
| Wild garlic | by 15 November |
From a month before the first autumn frost, so the roots grow before winter, to the late-planting limit on each crop’s page (about two weeks before the ground freezes, by ten years of weather).