| 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 | 148 (High) | 0 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 34 (Medium) | 0 (Low) | 217 (Very high) | 1 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 13 (Low) | 2 | 6 |
| February | 576 (Very high) | 0 (Low) | 19 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 13 (Low) | 0 (Low) | 210 (Very high) | 1 (Low) | 202 (Very high) | 0 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 51 (High) | 0 | 11 |
| March | 81 (Medium) | 175 (High) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 10 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 6 (Low) | 36 (Medium) | 39 (Medium) | 4 (Low) | 40 (Medium) | 0 (Low) | 11 (Low) | 1 (Low) | 4 (Low) | 18 (Medium) | 2 | 11 |
| April | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| May | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| June | 2 (Low) | 2 (Low) | 123 (High) | 4 (Low) | 24 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 12 (Low) | 14 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 25 (Medium) | 0 (Low) | 7 (Low) | 12 (Low) | 7 (Low) | 0 (Low) | 2 (Low) | 12 | 9 |
| July | 6 (Low) | 0 (Low) | 40 (Medium) | 3 (Low) | 15 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 5 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 17 (Medium) | 11 (Low) | 2 (Low) | 0 (Low) | 4 (Low) | 17 | 7 |
| August | 2 (Low) | 0 (Low) | 11 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 3 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 27 (Medium) | 8 (Low) | 2 (Low) | 0 (Low) | 4 (Low) | 2 | 8 |
| September | 2 (Low) | 0 (Low) | 7 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 3 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 23 (Medium) | 5 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 2 | 3 |
| October | 5 (Low) | 0 (Low) | 5 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 7 (Low) | 7 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 1 | 10 |
| November | 35 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 47 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 2 | 3 |
| December | 537 (Very high) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 2 | 4 |