| 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 | 1,198 (Very high) | 0 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 16 (Medium) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 16 (Medium) | 0 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 23 (Medium) | 1 (Low) | 0 (Low) | 2 (Low) | — | 1 |
| February | 2,337 (Very high) | 8 (Low) | 36 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 6 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 239 (Very high) | 0 (Low) | 168 (Very high) | 1 (Low) | 526 (Very high) | 0 (Low) | 2 (Low) | 6 (Low) | 8 (Low) | 2 (Low) | 0 | 5 |
| March | 1,293 (Very high) | 55 (Medium) | 16 (Low) | 1 (Low) | 0 (Low) | 34 (Medium) | 0 (Low) | 2 (Low) | 50 (High) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 137 (Very high) | 4 (Low) | 74 (High) | 104 (Very high) | 415 (Very high) | 1 (Low) | 12 (Low) | 16 (Medium) | 11 (Low) | 5 (Low) | 3 | 23 |
| April | 23 (Low) | 138 (High) | 15 (Low) | 5 (Low) | 1 (Low) | 24 (Medium) | 0 (Low) | 1 (Low) | 494 (Very high) | 0 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 11 (Low) | 286 (Very high) | 1 (Low) | 90 (High) | 8 (Low) | 1 (Low) | 186 (Very high) | 6 (Low) | 14 (Low) | 10 (Low) | 14 | 6 |
| May | 12 (Low) | 4 (Low) | 70 (Medium) | 28 (Medium) | 324 (High) | 1 (Low) | 5 (Low) | 0 (Low) | 35 (Medium) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 2 (Low) | 48 (Medium) | 0 (Low) | 455 (Very high) | 1 (Low) | 5 (Low) | 765 (Very high) | 39 (Medium) | 3 (Low) | 37 (Medium) | 7 | 7 |
| June | 28 (Low) | 1 (Low) | 58 (Medium) | 9 (Low) | 28 (Low) | 1 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 22 (Medium) | 3 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 297 (Very high) | 0 (Low) | 2 (Low) | 60 (High) | 10 (Low) | 0 (Low) | 6 (Low) | 8 | 3 |
| July | 2 (Low) | 0 (Low) | 17 (Low) | 2 (Low) | 7 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 5 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 3 (Low) | 11 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 3 | 3 |
| August | 1 (Low) | 0 (Low) | 6 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 5 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 | 1 |
| September | 4 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 6 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 0 |
| October | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 | 1 |
| November | 2 (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) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 | 0 |
| December | 4 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 | 0 |