| Month | Cypress/Yew | London Plane | Grasses | Plantain | Olive | Birch | Privet | Alder | Maple | Mugwort | Chestnut | Composites | Hazel | Heather | Eucalyptus | Ash | Mulberry | Elm | Pine | Poplar | Goosefoot/Amaranth | Oak | Sorrel | Willow | Nettle | Other | Unidentified |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| January | 15 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 0 |
| February | 221 (Very high) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 26 (Medium) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 39 (Medium) | 35 (Medium) | 0 (Low) | 88 (High) | 1 (Low) | 13 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 | 0 |
| March | 554 (Very high) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 15 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 31 (Medium) | 0 (Low) | 117 (Very high) | 2 (Low) | 80 (High) | 0 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 8 (Low) | 0 | 1 |
| April | 3 (Low) | 3 (Low) | 29 (Low) | 91 (High) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 4 (Low) | 401 (Very high) | 7 (Low) | 2 (Low) | 2 (Low) | 0 | 0 |
| May | 12 (Low) | 0 (Low) | 192 (Very high) | 135 (Very high) | 675 (Very high) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 27 (Medium) | 6 (Low) | 0 (Low) | 16 (Medium) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 365 (Very high) | 0 (Low) | 6 (Low) | 1,880 (Very high) | 34 (Medium) | 1 (Low) | 8 (Low) | 2 | 3 |
| June | 5 (Low) | 1 (Low) | 51 (Medium) | 9 (Low) | 149 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 4 (Low) | 0 (Low) | 39 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 177 (Very high) | 0 (Low) | 3 (Low) | 128 (Very high) | 10 (Low) | 3 (Low) | 8 (Low) | 1 | 0 |
| July | 0 (Low) | 0 (Low) | 10 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 5 (Low) | 14 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 0 |
| August | 2 (Low) | 0 (Low) | 7 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 9 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 | 0 |
| September | 1 (Low) | 1 (Low) | 2 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 6 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 1 |
| October | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| November | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| December | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |