| 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 | 249 (Very high) | 2 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 17 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 46 (Medium) | 0 (Low) | 56 (High) | 1 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 20 (Medium) | 2 | 2 |
| February | 1,013 (Very high) | 0 (Low) | 15 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 16 (Medium) | 12 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 90 (High) | 0 (Low) | 143 (Very high) | 4 (Low) | 422 (Very high) | 1 (Low) | 11 (Low) | 1 (Low) | 4 (Low) | 38 (Medium) | 5 | 6 |
| March | 760 (Very high) | 7,561 (Very high) | 12 (Low) | 14 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 60 (High) | 0 (Low) | 0 (Low) | 2 (Low) | 7 (Low) | 2 (Low) | 2 (Low) | 4 (Low) | 1,523 (Very high) | 53 (High) | 129 (Very high) | 274 (Very high) | 2 (Low) | 42 (Medium) | 2 (Low) | 8 (Low) | 36 (Medium) | 18 | 14 |
| April | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| May | 21 (Low) | 2 (Low) | 285 (Very high) | 94 (High) | 611 (Very high) | 5 (Low) | 0 (Low) | 0 (Low) | 14 (Low) | 0 (Low) | 2 (Low) | 9 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 170 (Very high) | 0 (Low) | 35 (Medium) | 297 (Very high) | 33 (Medium) | 0 (Low) | 63 (High) | 64 | 19 |
| June | 12 (Low) | 1 (Low) | 91 (High) | 13 (Low) | 99 (Medium) | 1 (Low) | 20 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 13 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 66 (High) | 0 (Low) | 6 (Low) | 16 (Medium) | 7 (Low) | 0 (Low) | 35 (Medium) | 27 | 5 |
| July | 7 (Low) | 1 (Low) | 49 (Medium) | 6 (Low) | 4 (Low) | 0 (Low) | 40 (Medium) | 0 (Low) | 0 (Low) | 2 (Low) | 7 (Low) | 9 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 9 (Low) | 17 (Medium) | 1 (Low) | 0 (Low) | 8 (Low) | 12 | 4 |
| August | 20 (Low) | 0 (Low) | 5 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 8 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 10 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 2 | 4 |
| September | 9 (Low) | 1 (Low) | 6 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 22 (Medium) | 4 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 2 | 2 |
| October | 19 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 1 (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) | 0 (Low) | 12 (Low) | 0 (Low) | 5 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 1 | 1 |
| November | 17 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 14 (Low) | 1 | 1 |
| December | 285 (Very high) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 2 | 1 |