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 | 2,876 | 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 | 44 | 554 | 121 | 18 | 730 | 2 | 0 | 0 | 4 | 0 | 0 | 2 | 0 | 2 | 1 | 0 | 1,190 | 1 | 41 | 35 | 8 | 541 | 11 | 8 | 154 | 33 | 34 |
| May | 27 | 37 | 223 | 38 | 461 | 4 | 1 | 1 | 1 | 0 | 1 | 8 | 0 | 2 | 0 | 0 | 242 | 0 | 161 | 0 | 4 | 307 | 16 | 1 | 11 | 58 | 35 |
| June | — | — | — | 33 | 76 | 1 | 18 | 0 | 0 | 0 | — | 15 | 0 | 2 | 1 | 0 | 79 | 0 | 85 | 1 | — | 25 | 20 | 1 | 4 | 33 | 46 |
| July | — | — | — | 2 | 5 | 0 | 5 | 0 | 0 | 0 | — | 2 | 0 | 1 | 1 | 0 | 10 | 0 | 10 | 0 | — | 1 | 1 | 0 | 3 | 17 | 16 |
| August | — | — | — | 2 | 2 | 0 | 1 | 0 | 0 | 1 | — | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | — | 0 | 1 | 0 | 10 | 5 | 11 |
| September | — | — | — | 0 | 1 | 0 | 1 | 0 | 0 | 2 | — | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | — | 0 | 1 | 0 | 13 | 3 | 1 |
| October | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| November | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| December | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |