ClimavisoWhere in Spain are fog warnings most frequent?
AEMET data up to 26 October 2026. Averages for 2019–2025. Updated 26 October 2026.
Short answer
In the Depresión central de Lleida zone: 12 fog-warning days a year on average from 2019 to 2025, against 1.2 in an average Spanish zone. 105 of the 180 zones had none.
| Zone | Province | Fog warning days a year | |
|---|---|---|---|
| 1 | Depresión central de Lleida | Lleida | 12 |
| 2 | Meseta de Valladolid | Valladolid | 12 |
| 3 | Meseta de Zamora | Zamora | 12 |
| 4 | Sur de Huesca | Huesca | 11 |
| 5 | Meseta de Palencia | Palencia | 9.4 |
| 6 | Meseta de Salamanca | Salamanca | 9.4 |
| 7 | Meseta de León | León | 8.1 |
| 8 | Ribera del Ebro de Zaragoza | Zaragoza | 7.4 |
| 9 | Vegas del Guadiana | Badajoz | 6.9 |
| 10 | Centro de Huesca | Huesca | 6.6 |
| 11 | Meseta de Burgos | Burgos | 6.4 |
| 12 | Meseta de Ávila | Ávila | 5.7 |
| 13 | Ribera del Ebro de Navarra | Navarra | 5.3 |
| 14 | Centro de Lugo | Lugo | 5.1 |
| 15 | Depresión central de Tarragona | Tarragona | 5.0 |
| 16 | Meseta de Segovia | Segovia | 5.0 |
| 17 | Valle del Guadiana | Ciudad Real | 4.6 |
| 18 | Bajo Aragón de Teruel | Teruel | 4.3 |
| 19 | La Mancha de Ciudad Real | Ciudad Real | 4.3 |
| 20 | Cinco Villas de Zaragoza | Zaragoza | 4.1 |
How it is counted
A warning day is a day on which AEMET had at least one yellow, orange or red warning in the zone; it counts once, at its highest level. Spain has 182 warning zones and every town gets the warnings of its own. Averages use the complete years 2019–2025; provinces and regions are the average of their zones. A warning is a forecast that a threshold will be crossed, not damage, and each zone has its own thresholds: these figures measure how often AEMET warns, not the climate or the risk to a building.
Related questions
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How to cite
Climaviso (https://climaviso.com/en/questions/where-are-fog-warnings-most-frequent-in-spain/), from AEMET warning data. Authorised use of the information and its reproduction citing AEMET as its author.