| 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 | 231 (Very high) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 21 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 42 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 | 2 |
| February | 716 (Very high) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 17 (Medium) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 48 (Medium) | 0 (Low) | 233 (Very high) | 2 (Low) | 36 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 3 |
| March | 203 (Very high) | 469 (Very high) | 11 (Low) | 1 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 20 (Medium) | 43 (Medium) | 1 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 23 (Medium) | 228 (Very high) | 108 (Very high) | 66 (High) | 252 (Very high) | 1 (Low) | 1 (Low) | 1 (Low) | 27 (Medium) | 9 (Low) | 4 | 1 |
| April | 11 (Low) | 563 (Very high) | 7 (Low) | 12 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 1 (Low) | 273 (Very high) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 3 (Low) | 762 (Very high) | 6 (Low) | 58 (High) | 16 (Medium) | 1 (Low) | 72 (High) | 3 (Low) | 6 (Low) | 1 (Low) | 4 | 2 |
| May | 33 (Medium) | 7 (Low) | 206 (Very high) | 63 (High) | 208 (High) | 9 (Low) | 3 (Low) | 0 (Low) | 584 (Very high) | 0 (Low) | 2 (Low) | 13 (Low) | 0 (Low) | 25 (Medium) | 1 (Low) | 0 (Low) | 77 (High) | 1 (Low) | 123 (Very high) | 1 (Low) | 13 (Low) | 403 (Very high) | 28 (Medium) | 1 (Low) | 5 (Low) | 20 | 3 |
| June | 19 (Low) | 1 (Low) | 73 (Medium) | 12 (Low) | 169 (Medium) | 1 (Low) | 2 (Low) | 0 (Low) | 96 (High) | 0 (Low) | 11 (Low) | 6 (Low) | 0 (Low) | 3 (Low) | 3 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 146 (Very high) | 2 (Low) | 7 (Low) | 269 (Very high) | 10 (Low) | 1 (Low) | 11 (Low) | 10 | 5 |
| July | 1 (Low) | 1 (Low) | 21 (Low) | 2 (Low) | 4 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 15 (Medium) | 5 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 9 (Low) | 0 (Low) | 8 (Low) | 36 (Medium) | 1 (Low) | 0 (Low) | 9 (Low) | 9 | 12 |
| August | 2 (Low) | 0 (Low) | 5 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 8 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 14 (Low) | 11 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 34 | 11 |
| September | 1 (Low) | 1 (Low) | 6 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 35 (Medium) | 12 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 4 | 6 |
| October | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| November | 27 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 0 | 1 |
| December | 104 (High) | 1 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 | 1 |