| 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 | 124 (High) | 3 (Low) | 18 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 20 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 88 (High) | 0 (Low) | 25 (Medium) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 16 (Medium) | 3 | 1 |
| February | 379 (Very high) | 2 (Low) | 16 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 18 (Medium) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 128 (Very high) | 0 (Low) | 186 (Very high) | 4 (Low) | 39 (Medium) | 0 (Low) | 15 (Medium) | 1 (Low) | 11 (Low) | 56 (High) | 5 | 6 |
| March | 37 (Medium) | 3,053 (Very high) | 18 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 34 (Medium) | 0 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 6 (Low) | 13 (Low) | 23 (Medium) | 267 (Very high) | 1 (Low) | 5 (Low) | 3 (Low) | 13 (Low) | 36 (Medium) | 16 | 2 |
| April | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| May | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| June | 4 (Low) | 6 (Low) | 75 (Medium) | 11 (Low) | 6 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 9 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 17 (Medium) | 0 (Low) | 9 (Low) | 10 (Low) | 4 (Low) | 0 (Low) | 9 (Low) | 15 | 8 |
| July | 2 (Low) | 4 (Low) | 53 (Medium) | 10 (Low) | 7 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 29 (Medium) | 12 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 9 (Low) | 0 (Low) | 10 (Low) | 9 (Low) | 3 (Low) | 0 (Low) | 8 (Low) | 58 | 11 |
| August | 3 (Low) | 27 (Low) | 6 (Low) | 3 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 17 (Medium) | 4 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 111 | 2 |
| September | 32 (Medium) | 6 (Low) | 5 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 20 (Medium) | 2 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 16 | 4 |
| October | 163 (High) | 8 (Low) | 2 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 23 (Medium) | 0 (Low) | 3 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 3 | 1 |
| November | 73 (Medium) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 15 (Medium) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 15 (Medium) | 3 | 2 |
| December | 531 (Very high) | 1 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 9 (Low) | 3 | 2 |