Collado Villalba — 1999 Siguiente
| Mes | Cupresáceas/ | Plátano de p | Gramíneas | Plantago | Olivo | Abedul | Aligustre | Aliso | Artemisia | Castaño | Compuestas | Corylus | Ericáceas | Eucalipto | Fresno | Moreras | Olmos | Pinos | Populus | Quenopodiáce | Quercus | Rumex | Sauces | Urticáceas | PNI |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Enero | 1.798 | 0 | 4 | 0 | 0 | 0 | 0 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 228 | 0 | 21 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 |
| Febrero | 2.284 | 0 | 32 | 0 | 0 | 0 | 0 | 5 | 0 | 0 | 0 | 3 | 0 | 0 | 299 | 0 | 10 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Marzo | 577 | 14 | 3 | 0 | 0 | 4 | 0 | 5 | 0 | 0 | 0 | 3 | 0 | 0 | 10 | 0 | 19 | 7 | 64 | 0 | 14 | 14 | 3 | 0 | 0 |
| Abril | 30 | 140 | 38 | 10 | 0 | 48 | 0 | 0 | 0 | 0 | 1 | 0 | 7 | 0 | 0 | 137 | 4 | 58 | 33 | 0 | 363 | 6 | 0 | 7 | 20 |
| Mayo | 35 | 0 | 134 | 45 | 947 | 0 | 1 | 0 | 0 | 3 | 9 | 0 | 7 | 0 | 0 | 25 | 0 | 152 | 0 | 15 | 1.103 | 36 | 0 | 40 | 58 |
| Junio | 43 | 0 | 88 | 23 | 72 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 4 | 0 | 0 | 1 | 0 | 138 | 0 | 13 | 100 | 32 | 0 | 5 | 37 |
| Julio | 6 | 2 | 47 | 3 | 13 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 6 | 0 | 4 | 8 | 10 | 0 | 1 | 16 |
| Agosto | 1 | 0 | 5 | 6 | 2 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 11 | 0 | 0 | 0 | 2 | 0 | 9 | 3 | 2 | 0 | 0 | 7 |
| Septiembre | 0 | 0 | 5 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 1 | 17 | 0 | 1 | 0 | 4 | 0 | 6 | 2 | 0 | 0 | 0 | 5 |
| Octubre | 18 | 0 | 2 | 2 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7 | 0 | 1 | 1 | 1 | 0 | 0 | 2 |
| Noviembre | 8 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7 | 0 | 0 | 3 | 1 | 0 | 6 | 2 |
| Diciembre | 35 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 1 | 3 |