| 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 | 116 (High) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 51 (High) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 13 (Low) | 0 (Low) | 19 (Medium) | 2 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | — | 0 |
| February | 490 (Very high) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 35 (Medium) | 0 (Low) | 188 (Very high) | 1 (Low) | 953 (Very high) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 | 2 |
| March | 497 (Very high) | 14,593 (Very high) | 29 (Low) | 5 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 1 (Low) | 15 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 23 (Medium) | 514 (Very high) | 122 (Very high) | 280 (Very high) | 253 (Very high) | 1 (Low) | 66 (High) | 2 (Low) | 12 (Low) | 14 (Low) | 3 | 4 |
| April | 22 (Low) | 1,073 (Very high) | 24 (Low) | 27 (Medium) | 2 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 21 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 21 (Medium) | 0 (Low) | 1 (Low) | 675 (Very high) | 5 (Low) | 343 (Very high) | 11 (Low) | 1 (Low) | 950 (Very high) | 6 (Low) | 9 (Low) | 32 (Medium) | 25 | 8 |
| May | 12 (Low) | 15 (Low) | 186 (Very high) | 104 (Very high) | 487 (Very high) | 2 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 26 (Medium) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 230 (Very high) | 0 (Low) | 14 (Low) | 558 (Very high) | 15 (Medium) | 18 (Medium) | 35 (Medium) | 18 | 23 |
| June | 26 (Low) | 0 (Low) | 95 (High) | 18 (Low) | 116 (Medium) | 0 (Low) | 5 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 14 (Low) | 5 (Low) | 0 (Low) | 70 (High) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 304 (Very high) | 0 (Low) | 8 (Low) | 211 (Very high) | 7 (Low) | 0 (Low) | 19 (Medium) | 13 | 6 |
| July | 3 (Low) | 0 (Low) | 22 (Low) | 8 (Low) | 3 (Low) | 0 (Low) | 16 (Medium) | 0 (Low) | 0 (Low) | 2 (Low) | 21 (Medium) | 2 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 0 (Low) | 21 (Medium) | 37 (Medium) | 1 (Low) | 0 (Low) | 8 (Low) | 3 | 21 |
| August | 5 (Low) | 0 (Low) | 7 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 9 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 0 (Low) | 29 (Medium) | 25 (Medium) | 0 (Low) | 0 (Low) | 9 (Low) | 6 | 11 |
| September | 24 (Low) | 0 (Low) | 9 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 38 (Medium) | 10 (Low) | 1 (Low) | 0 (Low) | 6 (Low) | 1 | 6 |
| October | 18 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 5 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 | 3 |
| November | 3 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 8 (Low) | 0 (Low) | 5 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 | 2 |
| December | 15 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 1 |