| 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 | 102 (High) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 17 (Medium) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 | 1 |
| February | 308 (Very high) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 13 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 67 (High) | 0 (Low) | 50 (High) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 7 (Low) | 0 | 13 |
| March | 279 (Very high) | 2 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 8 (Low) | 0 (Low) | 9 (Low) | 2 (Low) | 43 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 13 (Low) | 3 | 2 |
| April | 22 (Low) | 714 (Very high) | 13 (Low) | 133 (Very high) | 1 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 54 (High) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 191 (Very high) | 5 (Low) | 21 (Medium) | 18 (Medium) | 2 (Low) | 581 (Very high) | 32 (Medium) | 9 (Low) | 39 (Medium) | 16 | 7 |
| May | 9 (Low) | 71 (Medium) | 74 (Medium) | 201 (Very high) | 76 (Medium) | 8 (Low) | 0 (Low) | 0 (Low) | 108 (Very high) | 1 (Low) | 1 (Low) | 7 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 20 (Medium) | 3 (Low) | 77 (High) | 284 (Very high) | 3 (Low) | 1,185 (Very high) | 47 (Medium) | 13 (Low) | 41 (Medium) | 32 | 9 |
| June | 10 (Low) | 6 (Low) | 81 (Medium) | 72 (High) | 374 (High) | 1 (Low) | 1 (Low) | 0 (Low) | 23 (Medium) | 0 (Low) | 10 (Low) | 16 (Medium) | 0 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 159 (Very high) | 0 (Low) | 10 (Low) | 77 (High) | 15 (Medium) | 2 (Low) | 30 (Medium) | 27 | 9 |
| July | 5 (Low) | 3 (Low) | 67 (Medium) | 17 (Low) | 23 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 6 (Low) | 0 (Low) | 14 (Low) | 10 (Low) | 0 (Low) | 3 (Low) | 9 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 32 (Medium) | 0 (Low) | 6 (Low) | 26 (Medium) | 3 (Low) | 0 (Low) | 8 (Low) | 17 | 5 |
| August | 2 (Low) | 7 (Low) | 11 (Low) | 3 (Low) | 11 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 2 (Low) | 6 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 14 (Low) | 18 (Medium) | 2 (Low) | 0 (Low) | 3 (Low) | 16 | 5 |
| September | 8 (Low) | 3 (Low) | 5 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 12 (Low) | 10 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 | 3 |
| October | 49 (Medium) | 2 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 5 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 2 |
| November | 51 (Medium) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 1 |
| December | 88 (Medium) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 | 1 |