Previous Alcalá de Henares — 2026
| Month | Cypress/Yew | London Plane | Grasses | Plantain | Olive | Birch | Privet | Alder | Maple | Mugwort | Chestnut | Composites | Hazel | Heather | Eucalyptus | Ash | Mulberry | Elm | Pine | Poplar | Goosefoot/Am | Oak | Sorrel | Willow | Nettle | Other | Unidentified |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| January | 499 | 0 | 2 | 0 | 0 | 0 | 0 | 19 | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 22 | 1 | 0 | 43 | 0 | 1 | 1 | 1 | 0 | 2 | 0 | 3 |
| February | 3.545 | 0 | 11 | 0 | 0 | 0 | 0 | 9 | 1 | 0 | 0 | 1 | 2 | 1 | 0 | 84 | 0 | 425 | 9 | 436 | 0 | 0 | 1 | 1 | 25 | 1 | 3 |
| March | 1.281 | 975 | 12 | 1 | 0 | 2 | 0 | 1 | 58 | 0 | 0 | 1 | 2 | 1 | 1 | 4 | 3.481 | 24 | 24 | 214 | 1 | 4 | 1 | 5 | 53 | 8 | 8 |
| April | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| May | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| June | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| July | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| August | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| September | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| October | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| November | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| December | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |