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Collado Villalba — 2026
| Month | Cypress/Yew | London Plane | Grasses | Plantain | Olive |
|---|---|---|---|---|---|
| January | 526 (Very high) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) |
| February | 457 (Very high) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) |
| March | 500 (Very high) | 32 (Medium) | 14 (Low) | 1 (Low) | 0 (Low) |
| April | 11 (Low) | 229 (High) | 9 (Low) | 4 (Low) | 6 (Low) |
| May | 5 (Low) | 0 (Low) | 65 (Medium) | 31 (Medium) | 63 (Medium) |
| June | — | — | — | 15 (Low) | 18 (Low) |
| July | — | — | — | 2 (Low) | 3 (Low) |
| August | — | — | — | 2 (Low) | 3 (Low) |
| September | — | — | — | 1 (Low) | 2 (Low) |
| October | — | — | — | 0 (Low) | 1 (Low) |
| November | — | — | — | — | — |
| December | — | — | — | — | — |