| 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 | 188 (High) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 | 0 |
| February | 572 (Very high) | 2 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 19 (Medium) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 92 (High) | 2 (Low) | 28 (Medium) | 2 (Low) | 13 (Low) | 1 (Low) | 7 (Low) | 0 (Low) | 3 (Low) | 11 (Low) | 0 | 0 |
| March | 133 (High) | 547 (Very high) | 22 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 11 (Low) | 1 (Low) | 19 (Medium) | 14 (Low) | 257 (Very high) | 0 (Low) | 38 (Medium) | 3 (Low) | 5 (Low) | 42 (Medium) | 1 | 0 |
| April | 19 (Low) | 1,406 (Very high) | 8 (Low) | 10 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 10 (Low) | 59 (High) | 1 (Low) | 10 (Low) | 84 (High) | 0 (Low) | 112 (Very high) | 13 (Low) | 2 (Low) | 37 (Medium) | 1 | 0 |
| May | 2 (Low) | 3 (Low) | 384 (Very high) | 47 (Medium) | 194 (Medium) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 19 (Medium) | 13 (Low) | 0 (Low) | 8 (Low) | 4 (Low) | 0 (Low) | 30 (Medium) | 0 (Low) | 44 (Medium) | 0 (Low) | 13 (Low) | 193 (Very high) | 39 (Medium) | 10 (Low) | 8 (Low) | 1 | 0 |
| June | 10 (Low) | 4 (Low) | 349 (Very high) | 26 (Medium) | 500 (Very high) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 13 (Low) | 9 (Low) | 1 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 409 (Very high) | 0 (Low) | 6 (Low) | 720 (Very high) | 73 (High) | 1 (Low) | 18 (Medium) | 9 | 7 |
| July | 1 (Low) | 1 (Low) | 77 (Medium) | 2 (Low) | 5 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 17 (Medium) | 0 (Low) | 6 (Low) | 10 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 5 | 0 |
| August | 1 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 6 (Low) | 12 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 3 | 0 |
| September | 2 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 3 (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) | 0 (Low) | 2 (Low) | 0 (Low) | 5 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 0 |
| October | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| November | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| December | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 0 |